904 jobs found

We're looking for a Senior-level Software Engineer with strong JavaScript/TypeScript skills and experience across modern web stacks. You'll be instrumental in our transition away from Drupal as we modernise and scale our platform. Tech Stack: At least 6-8 years commercial experience with Node, JavaScript or TypeScript Exposure of Laravel and/or Python (Django or Flask a plus) Familiarity with Drupal and some knowledge of modern front-end frameworks (React, Vue, etc.) What You'll Do: Build scalable applications using modern frameworks and clean architecture Contribute to backend services and APIs (Python or Laravel-based) Help re-platform and migrate to a modern stack Collaborate cross-functionally with UX, Product, and DevOps What We Offer: A supportive environment that encourages professional growth and continuous learning. An inclusive, collaborative culture within one of the UK's leading business services providers. A competitive salary and benefits package. 49904MSR1 INDLON The Portfolio Group are acting on behalf of our client in recruiting for this position.

Lead PHP Developer - PHP Laravel/Symfony/CodeIgniter; HTML, CSS, SQL/MySQL, AWS inc AI Search; Javascript Vue.js, React.js; Full Stack/Full Lice Cycle, Professional Services/Finance Systems. Permanent, London (Hybrid 2/3), £130k - £150k (On Experience) +Benefits Lead PHP Developer/Senior Web Developer/Team Lead required by global professional services company. Working on both internal systems integrating with 3rd party systems as well as customer facing web-based systems built in PHP and associated frameworks, you will lead development initiatives within the full life cycle. Working with an internationally dispersed team the Lead PHP Developer/Senior Web Developer will: Work with both Project Managers and Data Scientists to define, manage and deliver projects Play a lead role in the architecture and design of web-based systems Develop code within the full life cycle: >>>DevelopmentTestingDeploymentRefactor Develop integrations with internal and external system via APIs Undertake code reviews across PHP, Laravel, Symfony, CodeIgniter, Go/Golang (to a lesser degree), SQL/MySQL, HTML, CSS and Javascript (inc React.js and Vue.js) Architect, build, and deploy scalable, cloud-native, AI-powered data-driven products in AWS Drive the integration of AI, automation, agents, and modern tooling (including model context protocol capabilities) to enhance developer productivity and delivery pipelines Lead and develop team members across software, data, platform, and AI We are open to applications from across industry and varying levels of experience in terms of leadership and project delivery; any experience working within Agile/Scrum would be beneficial. You will however: Possess Senior level, hands-on PHP development experience with both raw OOPHP and at least one main contemporary framework such as Laravel/Symfony, CodeIgniter etc Work within the full stack of web development inc PHP, Javascript, HTML, CSS Be confident in use of various Javascript Frameworks inc Vue.js, React.js (or others) Possess strong database design skills for web-based systems utilising SQL/MySQL Be comfortable deploying enterprise applications within the AWS environment Apply microservices architecture, database design, and rigorous security standards Possess experience working with internal AI platforms as well as (ideally) AWS AI Search Demonstrate experience working within the full life cycle from design to delivery Be capable of leading diverse teams across development, DevOps, AI, Data Science This is an excellent opportunity to join a business at an exciting time of international development and play a key role in the future of its core business systems. Excellent benefits and flexible Hybrid (2 days in office) working conditions offered.

Lead Full Stack Developer (React | TypeScript | Java | Spring) | Leeds City Centre, 4 days p/week in office | £60,000 - £75,000 I'm currently partnered with a global software provider delivering data-driven, high-performance web applications. They're looking for a Lead Web Developer to take ownership of a major Front End modernisation project and help guide the next phase of their product development. This is an exciting opportunity for an experienced developer who thrives in a technical leadership role - someone who enjoys setting architectural direction, mentoring engineers, and remaining hands-on with code. The role: Lead the design and development of full stack web applications using React and TypeScript on the Front End, and Java/Spring on the Back End. Drive a key Front End migration project to deliver a cleaner, faster, and more scalable user experience. Define and uphold best engineering practices, performing code reviews and ensuring high-quality, maintainable code. Mentor and support junior and mid-level developers, fostering collaboration and growth across the team. Ensure performance, scalability, and security across all deployed applications. About you: 7+ years' commercial full stack development experience 2+ years in a senior or technical leadership capacity Strong experience with React, TypeScript, Java, Spring, and Hibernate Knowledge of RESTful APIs, SQL, and Front End tooling (Redux, React Query, testing frameworks) A passion for clean architecture, reusable code, and exceptional user experience Why join: You'll be joining an established technology business operating on a global scale, working with a highly skilled engineering team who value collaboration, innovation, and technical excellence. This is a great opportunity to make a real impact - owning architecture, guiding modernisation, and shaping product direction. Benefits include: 27 days annual leave plus bank holidays Hybrid and flexible working options Private health insurance and life cover Enhanced maternity/paternity leave Sick pay Ongoing training and development support If you're a hands-on developer with a passion for modern web technologies and technical leadership, APPLY NOW! Lead Full Stack Developer (React | TypeScript | Java | Spring) | Leeds City Centre, 4 days p/week in office |£60,000 - £75,000 Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy. To understand more about what we do with your data please review our privacy policy in the privacy section of the Oscar website.

Senior Support Engineer About Our Client Our client is a young, design-led healthcare technology company helping over 2,000 private doctors across the UK run their practices more effectively and efficiently, with their web and mobile platform, and hundreds of thousands of their patients. For too long, medical software has been clunky, user-hostile and complicated, and they are changing that. Several customers have independently described them as the Apple of practice management software . They are a bootstrapped, profitable and remote-first company of 25 people with 6 Full Stack Engineers including the company s founder. Having been remote from day one, they fully believe in its benefits. They do have a lovely office in London by the river for in-person collaboration when required, but this is not mandatory as they know some like in-person working and some prefer fully remote. About You Our client is looking for a Senior Support Engineer who thrives on solving real customer problems through hands-on technical work. You ll sit at the intersection of their support, engineering, and data migration teams a true technical generalist who enjoys variety. This is a great fit for a strong Developer who wants to take full ownership of debugging, fixing, and enhancing real-world product issues that impact doctors and patients. You ll work on: Investigating and resolving bugs or issues raised by our client s team of Customer Support Specialists. Making small-to-medium feature tweaks (e.g. modifying exports, adjusting logic). Writing Ruby scripts and jobs for post-migration data cleanup or updates. Collaborating with Developers and support staff to triage, prioritise, and resolve issues. Delivering small fixes to production regularly and reliably. What they are looking for: Strong experience with Ruby on Rails (Rails 7, Ruby 3.4). Proficiency with React, TypeScript / JavaScript, and PostgreSQL. Comfort working in a Linux-based environment (AWS ECS, command line). Great debugging and troubleshooting skills you enjoy getting to the root of problems. Fluent, friendly communication especially with non-technical users. A proactive, independent mindset you get things done without handholding. You must be located within GMT / BST 3 time zones and available during UK working hours (typically 9am 5:30pm). Nice to have: Sysadmin experience. Experience supporting SaaS products or working closely with support teams. Why join our client? Fully remote with flexible working, based around UK hours. Meaningful product used by thousands of doctors and patients every day. Calm, supportive, and highly autonomous culture. Direct involvement in product decisions and fixes that impact real people. Competitive salary.

Senior Software Tester / QA Engineer - Up to £44,000 PA Southampton - Hybrid Working We are working with a well-established technology organisation to recruit an experienced Senior Software Tester / QA Engineer to play a key role in the delivery of customer-facing systems and core software products. This position sits within a professional services environment and involves testing both standard solutions and complex, customer-specific implementations. You will work closely with developers, project managers and technical stakeholders, taking ownership of testing activities and ensuring systems meet defined quality standards prior to release and go-live. As a Senior Software Tester, you will be responsible for driving software quality through effective manual and automated testing practices. You will contribute to the ongoing improvement of testing processes, support customer UAT, and act as a subject-matter expert for QA activities across projects, identifying and resolving defects early in the delivery lifecycle. Key responsibilities: Leading and executing software testing activities on customer systems prior to installation and go-live Designing, writing and maintaining robust manual and automated test scripts Owning the creation and maintenance of test plans, test cases and supporting documentation Working collaboratively with development and technical teams to identify, log, prioritise and resolve defects Creating and managing test data to support functional, regression and integration testing Supporting and coordinating user acceptance testing, including direct customer engagement Providing go-live support and post-deployment validation where required Contributing to the continuous improvement of testing standards, tools and methodologies Providing guidance and best practice advice to customers during UAT and test planning Supporting internal product testing and mentoring junior team members where appropriate Requirements: Proven experience in a Software Testing / QA role, operating with a high degree of autonomy Strong hands-on experience with manual testing across complex systems Demonstrable experience designing and maintaining comprehensive test documentation Experience working in Windows Client and Server environments Confident use of Microsoft Office applications for test reporting and documentation Highly advantageous experience: ISTQB Foundation or Advanced certification Experience with test automation tools and frameworks (Ranorex, Selenium or similar) Exposure to C#, Java, or other object-oriented programming languages Experience with SQL Server and/or Oracle databases, including querying and data validation Experience using source control tools such as TFS or Git Understanding of network architecture, IT security and Active Directory Experience within document management, OCR or enterprise systems environments The role may involve occasional UK and international travel. Hybrid working is available once probation is passed, with 1-2 days per week on site.

Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone's chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. Job Title : Lead UI Developer / React Contract : Initial 12-Month Contract with potential to extend . Location : London (In office) Rate : £850 - £900 inside umbrella What You'll Do: As the Lead UI Developer, you will spearhead the development of our flagship Triforce Credit Project. You will be responsible for designing and implementing cutting-edge user interfaces that cater to front office e-trading applications. Your expertise will ensure that our software is not only highly functional but also delivers an exceptional user experience. Key Responsibilities: Lead the development of front office e-trading applications with a focus on low latency and performance. Collaborate with cross-functional teams to ensure seamless integration of UI components. Mentor and guide junior developers, fostering a culture of innovation and excellence. Stay up-to-date with industry trends and best practices to continually improve our UI strategies. What You Bring Deep Expertise: A proven track record of delivering complex, enterprise-grade front-office e-trading systems in high-pressure, real-time environments. Technical Authority: Languages: Exceptional command of JavaScript and TypeScript, with the ability to architect, optimise, and scale mission-critical applications. Front-End Frameworks: Mastery of React and Redux, with extensive experience shaping robust UI architectures used in demanding trading workflows. Back-End: Strong working knowledge of Java, capable of contributing effectively to full-stack solutions when required. Industry Insight: A comprehensive understanding of the full trading lifecycle within investment banking, particularly across Fixed Income or FX, with the ability to navigate front-office workflows and trading system behaviours at a granular level. Why Join Us? Innovative Environment: Be a part of a team that thrives on creativity and innovation, where your ideas will be valued. Career Growth: Opportunities for professional development and career advancement are abundant. Impactful Work: Contribute to projects that directly influence the efficiency and effectiveness of trading operations in the financial sector. Collaborative Culture: Work alongside talented professionals who are passionate about technology and finance. Adecco is a disability-confident employer. It is important to us that we run an inclusive and accessible recruitment process to support candidates of all backgrounds and all abilities to apply. Adecco is committed to building a supportive environment for you to explore the next steps in your career. If you require reasonable adjustments at any stage, please let us know and we will be happy to support you. We use generative AI tools to support our candidate screening process. This helps us ensure a fair, consistent, and efficient experience for all applicants. Rest assured, all final decisions are made by our hiring team, and your application will be reviewed with care and attention.

CompanyA specialist technology organisation operating in a globally critical sector is seeking an experienced developer to join their technical team. They build and support software used in fast-paced operational environments, with a focus on reliability, awareness, and continuous improvement. The company is also beginning to expand its use of AI within its engineering function.RoleThis is a hands-on Java development role involving the enhancement of existing applications, support for internal systems, and involvement in the evolution of the organisation's technical approach. You'll contribute to application development, integrations, and operational support, while helping the team explore practical uses of AI in everyday engineering workflows.This is a hybrid available on a permanent basis. Unfortunately sponsorship is not available and candidates will need to hold ILR or a British passport.Occasional out-of-hours support may be required.Person The ideal candidate is an accomplished Java developer who enjoys solving complex technical problems and contributing to the improvement of development practices. They bring confidence with modern AI-assisted coding tools and an interest in helping others adopt them. Essential qualities include: Senior-level experience delivering complex Java systems Practical experience using AI coding tools (e.g., GitHub Copilot, Cursor) Strong grounding in Java technologies such as threading, JDBC, sockets, HTTP/S, EJB and JPA Solid SQL skills and experience deploying Java applications (ideally Wildfly) Some experience with client-side JavaScript Desirable experience: GWT / GWT-EXT PostgreSQL / PostGIS Working with CSV data Eclipse / Maven Java-to-Microsoft Office automation

SENIOR SOFTWARE ENGINEER - eDV CLEARED NEW PERMANENT JOB OPPORTUNITY AVAILABLE WITHIN A GLOBALLY LEADING NATIONAL SECURITY COMPANY FOR A SENIOR SOFTWARE ENGINEER WITH eDV CLEARANCE Permanent job opportunity for a Senior Software Engineer Globally leading defence / cyber security company Salary up to £100,000 plus clearance bonus London based organisation in an easily accessible location Permanent Software Engineer To apply please call / or email WHO WE ARE? We are recruiting Senior and Lead Software Engineers to work with a multi-national, industry leading National Security client in central London. Due to the nature of the work you must hold enhanced DV Security Clearance. WHAT WILL THE SENIOR SOFTWARE ENGINEER BE DOING? As a Senior Software Engineer, you will work with an experienced agile team to design and deliver packages of bespoke work, work development teams and liaise with customers. You will work through the entire software development life cycle from requirements capture to R&D, implementation to automation. WE NEED THE SENIOR SOFTWARE ENGINEER TO HAVE . Current enhanced DV clearance Experience with at least one or more of the following: Java, Python, C++, .NET, C#, JavaScript, React Experience mentoring juniors or leading a team Experience / Knowledge of automation IT WOULD BE NICE FOR THE SENIOR SOFTWARE ENGINEER TO HAVE . Cloud based experience Microservice architecture or server-less architecture Big Data / Messaging technologies such as Apache Nifi / MiNiFi / Kafka TO BE CONSIDERED . Please either apply by clicking online or emailing me directly to For further information please call me on . I can make myself available outside of normal working hours to suit from 7am until 10pm. If unavailable please leave a message and either myself or one of my colleagues will respond. By applying for this role you give express consent for us to process & submit (subject to required skills) your application to our client in conjunction with this vacancy only. Also feel free to connect with me on LinkedIn, just search Dominic Barbet. I look forward to hearing from you. SENIOR SOFTWARE ENGINEER - DV CLEARED KEY SKILLS: SENIOR SOFTWARE ENGINEER / SENIOR SOFTWARE DEVELOPER LEAD SOFTWARE ENGINEER / JAVA DEVELOPER / JAVA ENGINEER / LEAD SOFTWARE DEVELOPER / SENIOR SOFTWARE DEVELOPER / DV CLEARED / DV CLEARANCE / DEVELOPPED VETTING / DEVELOPED VETTED / DEEP VETTING / DEEP VETTED / SC CLEARED / SC CLEARANCE / SECURITY CLEARED / SECURITY CLEARANCE

PRINCIPAL SOFTWARE ENGINEER - DV CLEARED BRAND NEW PERMANENT JOB OPPORTUNITY AVAILABLE WITHIN A LEADING SOFTWARE CONSULTANCY FOR A SOFTWARE TEAM LEAD WITH ENHANCED DV CLEARANCE Permanent job opportunity for a Software Team Lead Leading National Security consultancy Salary up to £100,000 + Benefits + Clearance Bonus London based organisation in an easily accessible location To apply please call / or email WHO WE ARE? We are recruiting a Software Team Lead to work with a leading consultancy in London. We support Central Government, Defence and Law Enforcement customers across the UK with Software, Digital and Data products and tools to help keep the UK safe. Due to the nature of the work and the customers, you must hold enhanced DV Security Clearance. WHAT WILL THE SOFTWARE TEAM LEAD BE DOING? As a Software Team Lead, you will act as a Lead Technologist and work hand in hand with the engineering and product teams, leading the design and development. It will you be your job to design and deliver scalable software both in the cloud, and on-premise. You'll play a pivotal role in the design and direction of our products, and you'll engage with key customers to understand their needs and shape them into an effective product and technology roadmap. WE NEED THE SOFTWARE TEAM LEAD TO HAVE . Current DV clearance (Enhanced) We're looking for deep and broad experience in building and designing software Natural Technical leadership skills Solid understanding and experience with modern DevOps methodology Experience working in the National Security domain Excellent communication skills, both written and verbal Experience scaling, leading and mentoring development teams Experience with public cloud technologies Experience translating user requirements into technical requirements Must be able to use a wide variety of open-source technologies Experience with CI and analysis systems Experience with Bids and Tenders is preferred but not essential TO BE CONSIDERED . Please either apply by clicking online or emailing me directly to For further information please call me on or . I can make myself available outside of normal working hours to suit from 7am until 10pm. If unavailable please leave a message and either myself or one of my colleagues will respond. By applying for this role you give express consent for us to process & submit (subject to required skills) your application to our client in conjunction with this vacancy only. Also feel free to connect with me on LinkedIn, just search Dominic Barbet. I look forward to hearing from you. SOFTWARE TEAM LEAD - DV CLEARED KEY SKILLS: SENIOR SOFTWARE ENGINEER / SENIOR SOFTWARE DEVELOPER / LEAD SOFTWARE ENGINEER / JAVA DEVELOPER / JAVA ENGINEER / LEAD SOFTWARE DEVELOPER / SENIOR SOFTWARE DEVELOPER / DV CLEARED / DV CLEARANCE / DEVELOPPED VETTING / DEVELOPED VETTED / DEEP VETTING / DEEP VETTED / SC CLEARED / SC CLEARANCE / SECURITY CLEARED / SECURITY CLEARANCE

Software Engineer Watford - hybrid 6 month contract Inside ir35 Group expectations: Meets customer needs related to simple products and services while following standardised protocols. Develops personal capabilities using formal and informal training opportunities, while also coaching others as required. Identifies shortcomings in existing processes, systems and procedures, then uses established change management programmes to deliver prescribed outcomes and/or provide support services. Reviews non-compliance issues within current IT Security processes, systems and procedures, and works with guidance to ensure solution of ad hoc problems within the assigned unit and/or discipline. Helps others use and benefit from the existing knowledge management systems. Analyses customer needs and defines and delivers prescribed products by performing designated development/engineering activities using established systems. Keeps track of risk parameters and identifies and reports any major deviation to more senior colleagues while working within established risk management systems. Performs designated supplier management activities to deliver own prescribed outcomes and/or provide support to others by using existing systems and protocols. Navigates a wide variety of existing processes, procedures and precedents to interpret data and identify possible answers. Uses product specifications to design test procedures and standards. Provides primary supervision to a team performing transactional work or supervises a small group performing junior professional tasks. Responds to individual and team objectives and invests in improving personal performance by growing own skills and capabilities, coaching others when required. Investigates questions related to existing programmes, processes and procedures. Additional expectations: Contribute to story refinement and estimation sessions Attend agile ceremonies such as stand-ups, retrospectives etc. Communicate effectively with stakeholders and build relationships with users around the business Communicate with third-party developers when we collaborate with other development houses Work with members of the business, to ensure technical solutions meet business needs Produce good quality, well-structured code, always thinking about performance Implement libraries and tooling to support our products Collaborate with other developers and coordinate project work Document technical approaches Key Skills: Good knowledge of the Perl programming language as well as knowledge of other tech stacks such as JavaScript Experience with architectural design patterns Experience with automated unit / integration testing Experience working in an agile environment Experience in Oracle database design and development Experience integrating with APIs Expertise with version control (Git) Self-motivated to complete allotted tasks Good written and verbal communication skills TO APPLY - PLEASE APPLY WITH AN UP-TO-DATE CV Candidates will ideally show evidence of the above in their CV in order to be considered. Please be advised if you haven't heard from us within 48 hours then unfortunately your application has not been successful on this occasion, we may however keep your details on file for any suitable future vacancies and contact you accordingly. Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone's chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. We use generative AI tools to support our candidate screening process. This helps us ensure a fair, consistent, and efficient experience for all applicants. Rest assured, all final decisions are made by our hiring team, and your application will be reviewed with care and attention.

SRT Marine Systems plc (SRT) is a market leader in the domain of international marine surveillance technology and systems. We are a respected, established, and an ambitious multi-national company headquartered in the UK with a global customer base. The company has a worldwide impact in the marine sector by leading the next generation of Maritime Domain Awareness technologies "MDA", products, and systems that significantly enhance security, safety, environmental protection, and sustainability. Our customers are global and range from the largest national coast guards to individual vessel owners. SRT is an exciting company where high-quality results are rewarded. We are ambitious and constantly seek to innovate in order to deliver better products and services to our customers. We strive to make SRT a rewarding and challenging place to work, where talented, hard-working individuals have the opportunity to make a real impact across the marine industry. Role overview of our Senior Software Tester As a Senior Software Tester you will work on the continued build of our Marine Domain Awareness (MDA) platform which is used to create an operational picture of maritime activity. Our systems ingest large volumes of streaming data from both satellite and terrestrial, along with other sensor sources. You will play a key role in validating the behaviour of a distributed, event-driven system operating on real-time maritime data. Testing activities include both automation and manual testing. The role of Senior Software Tester role is a hybrid working position based from our Cardiff office, you will be required to attend office 1 day per week as per the team's requirements. How We Work Sprint Work Developmenttickets move across the Jira board through the delivery workflow Tickets reaching the Test stage are assigned to a tester Testers validate functionality using a mix of automated and manual testing approaches QA Release Cycles Every six weeks, we conduct a dedicated two-week QA phase where: Testers pause normal sprint board work The focus shifts to release-wide regression testing Both manual and automated test suites are executed to validate the full platform Senior Software Tester - Responsibilities (not exhaustive): Test new features and improvements delivered during sprint cycles Design, implement, and maintain automated tests, along with the execution of manual exploratory and regression testing when required Validate message-driven workflows across distributed services Test REST API endpoints supporting CRUD operations within the system Participate in release regression cycles and help validate production-ready builds Investigate issues, reproduce defects, and provide clear bug reports Work closely with developers and product teams to clarify requirements and ensure testability Senior Software Tester - Required Skills and Experience Strong experience as a software tester or QA engineer Experience testing complex distributed systems or backend platforms Experience creating automated tests Familiarity with tools such as Postman (or similar API testing tools) Ability to write test scripts using one or more scripting languages (e.g. Python, JavaScript, Bash) Ability to understand system behaviour through logs, messages, and APIs Strong debugging and problem-solving skills Experience working within Agile / Scrum teams Familiarity with Jira or similar issue-tracking tools Company Benefits Highly Competitive Salary and Pension Hybrid Working Development opportunities SRT Marine Systems plc are an equal opportunity employer. We are committed to creating an inclusive working environment for all employees and actively encourage applications from all sectors of the community.

Develop advanced software for real-world defence and security systems An established engineering consultancy company is seeking experienced software developers to join their multi-disciplinary team delivering innovative sensor and signal processing solutions for defence and national security applications. Some projects are aligned with in-house hardware development and can involve developing algorithms for new sensor data and optimising software for constrained environments. Other projects will see you developing sophisticated software in the cyber security industry, as well as creating UIs for electronic gizmos using web technologies. Please note: this role requires eligibility for UK Developed Vetting (DV) clearance. Applicants must therefore be British citizens who have lived in the UK for the past 10 years. You will be working alongside other bright software and hardware engineers on varied and challenging projects. You will have the opportunity to lead and mentor other engineers, as well as be supported to achieve your own career goals. With other experienced engineers to learn from and cutting-edge technical challenges to solve, this is a great place to continue developing your technical skills. Requirements: Commercial-grade experience developing and maintaining complex systems in C/C++. Strong academic background in a numerate discipline (e.g. Maths, Physics, Engineer, computer science). This will probably include a 1st or 2:1 at degree level and may include a PhD. Strong communication skills both for client work and for mentoring and leading team members. British citizenship and UK residency for at least 10 years. While not required, the following will significantly strengthen your application: DSP and/or image processing expertise. Familiarity with web UI technologies (HTML, JavaScript, etc) and Linux systems. Due to the sensitive nature of much of the work you will perform you are required to be in the office every day, however the company understands everyone s schedules are different and so supports flexible working hours. With the company expanding there are good career progression opportunities through expanding technical capabilities and team leadership. The remunerations package is competitive with a strong base salary and good benefits including a generous 10% employer contribution pension scheme and annual performance related bonuses. Another top job from ECM, the high-tech recruitment experts. Even if this job's not quite right, do contact us now - we may well have the ideal job for you. To discuss your requirements call ecm or email your CV. We will always ask before forwarding your CV. Please apply (quoting ref: CV27604 ) only if you are eligible to live and work in the UK. By submitting your details you certify that the information you provide is accurate.

Senior Java Developer Location: London (Hybrid - 3 days in office) Role Overview We are seeking a highly skilled Senior Java Developer to join the eFX Algo IT team as a Subject Matter Expert (SME) in low latency trading systems. This is a hands-on development role focused on building and enhancing pricing, hedging, and market connectivity systems for the eFX trading desk. You'll be working in a fast-paced, front-office environment, collaborating closely with developers, business analysts, project managers, and QA teams. This role demands deep technical expertise in Java , particularly in low latency environments , and a strong understanding of FX trading systems . You'll be expected to contribute to all phases of the software development lifecycle, from design and prototyping to deployment and support. Key Responsibilities Design and develop high-performance, low-latency Java applications for pricing, hedging, and market connectivity. Collaborate with Front Office and IT teams to gather requirements and deliver analytics and trading solutions that directly impact P&L. Rapidly prototype solutions in an agile environment with evolving priorities. Participate in sprint planning, estimation, and provide regular updates to project managers. Create and maintain technical documentation including design specs, functional requirements, and unit tests. Provide third-line support and technical assistance to production support teams. Participate in software releases, which may occasionally occur outside regular working hours. Ensure compliance with internal policies and regulatory requirements, including financial crime prevention and mandatory training. Required Skills & Experience Technical Expertise Strong proficiency in Java , including: Multithreading Low latency techniques Garbage collection optimization Performance monitoring and metrics design Solid understanding of Linux/UNIX operating systems Experience with real-time, mission-critical systems Familiarity with networking tools (e.g., Wireshark), Solace , and 10GbE multicast Knowledge of FIX protocol and other market connectivity standards Domain Knowledge Front-office experience in FX trading or quantitative finance Understanding of pricing algorithms , dynamic spreading , and FX ECNs FX Options knowledge is a plus Methodologies & Collaboration Experience with Agile, Scrum, or Kanban delivery frameworks Strong communication skills with the ability to liaise between IT and trading desks Production stability mindset and ability to work with infrastructure and support teams Qualifications Bachelor's degree (or equivalent) in Computer Science, Mathematics, Physics, or Engineering Postgraduate qualifications in advanced computing or statistical disciplines are desirable Competencies & Values Ability to quickly learn and apply new technologies Proactive in contributing ideas and innovations to the team Commitment to transparency, accountability, excellence, and client service quality

Web Developer - PHP / JavaScript / MySQL Hybrid - Nottingham (2-3 days a week in office) 32k - 38k+ DOE + Benefits Package Join a growing team developing a range of eCommerce systems and internal web platforms. You'll initially focus on our in-house ecommerce platform offering, helping onboard new company websites and improve integration with external platforms. This is a hands-on role where you'll be encouraged to bring ideas, good organisation, and strong coding discipline. Key Skills & Experience Experience with PHP , JavaScript (including jQuery) , HTML5 , and CSS3 Good understanding of MySQL databases and MVC-based frameworks Familiarity with Bootstrap or similar frontend frameworks Familiarity with Laravel Framework or similar backend frameworks Understanding of responsive design and W3C standards Strong debugging and problem-solving skills Clear, maintainable coding style with good documentation Confidence working on eCommerce systems or product platforms Bonus: Excel skills and good general organisation We'd prefer someone based within reach of Nottingham, as our team likes to collaborate in person at least two days a week. However, flexibility will be given for experienced candidates. For someone local, there's potential to grow into a senior role long term. Why join our clients' team? Our client has been creating software for 40+ years, and boasts a tech team retention rate 4x the industry average, achieved through genuine investment in people - not just skills, but supporting them through life's challenges. Base salary matters, but stability and a supportive environment last longer. If you're looking for a role within a people-focused company that can help you build a challenging and rewarding career, this could be for you. If you enjoy varied web development work and want to play a key role in a small but expanding technical team, we'd love to hear from you. Deerfoot Recruitment Solutions Ltd is a leading independent tech recruitment consultancy in the UK. For every CV sent to clients, we donate 1 to The Born Free Foundation. We are a Climate Action Workforce in partnership with Ecologi. If this role isn't right for you, explore our referral reward program with payouts at interview and placement milestones. Visit our website for details. Deerfoot Recruitment Solutions Ltd is acting as an Employment Agency in relation to this vacancy.

Job Title: Experienced WordPress Engineer Location: Truro, Cornwall (Remote) Salary: Circa £40,000 per annum, depending on skills and experience Job Type: Full Time, Permanent About Us: Affinity is an award-winning, full-service, bespoke software development agency dedicated to solving digital problems for clients in both the public and private sectors. As a company, we are deeply technical and always flexible, with a core mission to deliver human-centered solutions to technical challenges. We work across the public sector, including central government, and enterprise-level private sector clients. We specialise in Discovery, Design, Development, Implementation, Data Integration and Migration, utilising open-source technologies including WordPress. We are committed to nurturing long-term relationships with our clients through quality-driven and cost-effective Support, Maintenance and Continuous Improvement. Please note that, due to the nature of this role and the fact that this company does not offer sponsorship, candidates require the legal right to live and work in the UK to be considered for this role. About the Role: We are seeking a UK-based, experienced WordPress Developer with related AWS hosting experience who will bring energy and drive, to join our agile development team. Self-motivated and with a can-do attitude, they will be looked upon to use creative problem-solving, coupled with significant experience of working with WordPress. The successful person will be part of an agile development team, building and maintaining customer websites and digital services using WordPress, SQL and PHP, utilising various services and open source tools. They will support existing solutions and help continually improve them through work packages. They will be working on a number of high profile accounts, ensuring that everything is completed to the highest level including design patterns, web security, technical documentation and application performance. Custom plugin and theme development experience would be desirable, together with a strong working knowledge of Git. They will be decisive and a good communicator, and will be looked upon to lead by example and help support the less experienced members of the team. Key Responsibilities Include: Key role on wordpress software support, development and AWS hosting projects as well as research and testing as required. Attend project meetings as requested by the Delivery Manager or Senior Developer. Record time spent on each project on a day by day basis to the required level of detail. Remain current regarding changes in relevant technology and systems to ensure that technical knowledge is up to date. About you: Ideal candidates will have experience integrating WordPress, tuning and improving WordPress implementations and enjoy fast-paced, challenging and real-time problem solving. Ideal skills, not limited to: HTML5, CSS3, Sass (Tailwind CSS, Bootstrap, etc.) PHP and SQL Strong ES6+ Javascript skills, including Node JS and React Custom WordPress theme and plugin development Responsive/mobile web development RESTful APIs Version control, particularly Git Docker and containerisation AWS core services, such as EC2, ECS/EKS, EFS, database, CloudFront, WAF, CloudWatch, ElastiCache, IAM, etc. Infrasructure-as-Code - ideally Terraform and CloudFormation Strong communication skills, including client facing Ability to work as a team and autonomously Attention to detail and ability to work under pressure Commercially aware Useful experience for the role: Enterprise-level experience with either government or the private sector Continuous integration and deployment, incl. GitHub Actions, AWS CodePipeline, etc. Non-AWS cloud platforms, such as Microsoft Azure and Google Cloud Platform (GCP) Benefits: We are a flat organisation and team members are rewarded for being great at what they do, not the seniority they have reached in the company. 1 day of extra holiday per year of employment, up to a maximum of 8 extra days. We accommodate flexible working when needed. Continuing professional development opportunities ranging from on-the-job training to formal qualifications and certifications. Access to a professional and life coach where appropriate. We are an Investors In People and Living Wage accredited employer. Please click the APPLY button to submit your CV for this role. Candidates with the experience or relevant job titles of; Front End Developer, Back End Developer, PHP Developer, Web Developer, SQL Developer, Javascript Developer, Git, HTML5, CSS3, Sass, React, Gutenberg, AWS, Docker, Vagrant may also be considered for this role.

C# Senior Software Developer My client is seeking a talented C# Senior Softwar Developer to join their Preston-based team. This role offers an exciting opportunity to lead projects, mentor junior developers, and work on high-impact, secure banking solutions. You will be a key contributor to web portal and API development, ensuring performance, security, and reliability in a dynamic environment. This role is ideal for developers with strong technical expertise who are looking to grow into leadership or team management responsibilities. Key Responsibilities Develop and maintain web portals using ASP.NET MVC / .NET Core Design and integrate REST APIs with internal and third-party services Implement secure authentication mechanisms (JWT, OAuth2, API Keys) Connect applications to relational databases using Entity Framework Core (DbContext, LINQ, Migrations) Debug and trace request flows from UI Controller API Database Response Maintain and publish API documentation via Swagger / OpenAPI Ensure API security, reliability, and performance (error handling, retry logic, logging, timeouts, CORS) Collaborate with database, infrastructure, and QA teams for portal and API releases Participate in code reviews, version control, and CI/CD deployment workflows Required Technical Skills C# (strong proficiency) ASP.NET MVC or .NET Core Web API MVC concepts: Routing, Controllers, Filters, Middleware, Model Binding, Dependency Injection Entity Framework Core (DbContext, DbSet, OnModelCreating, LINQ) and ADO.NET/Raw SQL experience MS SQL Server or MySQL database experience HTML5, CSS3, JavaScript REST API expertise and integration (HttpClient, RestSharp, JSON serialization/deserialization, CORS, HTTPS, API security) Git version control and CI/CD workflows (Azure DevOps, GitLab CI preferred) Hosting experience with IIS or Kestrel Docker basics (preferred but not mandatory) Preferred/Bonus Skills Experience with fintech or payments API integration Cloud services (Azure, AWS) hosting basics Webhooks and event-based APIs Structured logging tools (Splunk, ELK, App Insights) Performance optimization and API rate-handling Why Join My Client Be part of a pioneering fintech/secure banking technology company Opportunity to mentor and lead junior developers Work in a supportive, collaborative, and technically driven environment Gain experience in high-security, mission-critical software projects Interested? Please Click Apply Now! C# Senior Software Developer

Senior Software Developer (Contract) Rate: Up to 500 per day (Inside IR35) Duration: Initial 3-month contract (starting ASAP) Location: Remote (UK-based) A client of ours is seeking experienced Senior Software Developers to join their team on an initial 3-month contract. Key Responsibilities Design, develop, and maintain scalable software solutions Collaborate with cross-functional teams to deliver high-quality products Contribute to architecture decisions and best practices Work within cloud-based environments and modern development frameworks Required Skills & Experience Strong experience with Java and Spring Boot Working knowledge of Kotlin and/or Node.js Hands-on experience with AWS Familiarity with Amazon EKS and associated tooling Experience with Terraform or other Infrastructure as Code (IaC) tools Government industry experience Additional Requirements Experience working within government environments is highly desirable Active SC clearance, or eligibility to obtain it, is required

Job Title: Senior Java / Python Full Stack Developer Location: Glasgow (x 5 days in office) Salary/Rate: 410 a day (Inside IR35) Start Date: April 2026 Job Type: Contract - 6 months Job Overview: We are seeking an experienced Senior Java / Python Full Stack Developer to design, develop, and maintain scalable enterprise applications. The successful candidate will play a key role in delivering high-quality solutions using Java, Python, Spring Boot, AWS, and modern frontend technologies . You will collaborate with cross-functional teams to build robust, high-performance applications while ensuring code quality, scalability, and security across the development lifecycle. Key Responsibilities - Develop high-quality software design and architecture using AWS, SQL, Spring Boot, Java, Spring MVC, JavaScript, Python and MySQL. - Collaborate with cross-functional teams to define, design, and ship new features. - Some hands on knowledge on React JS, Redux, HTML5, CSS3 - Some exposure to frontend testing tools like Jest - Ensure the performance, quality, and responsiveness of applications. - Identify and correct bottlenecks and fix bugs. - Maintain code quality, organization, and automation. - Implement security and data protection measures. - Conduct software analysis, programming, testing, and debugging. - Oversee the development of documentation throughout the software development life cycle. - Provide technical guidance and support to team members. - Stay up-to-date with emerging technologies and industry trends. - Optimize applications for maximum speed and scalability. - Participate in code reviews to maintain high code quality standards. - Contribute to continuous improvement by investigating alternatives and technologies. If you are interested in this opportunity, please apply now with your updated CV in Microsoft Word/PDF format. Disclaimer Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies. Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.

Developing high quality enterprise software in C# .NET, with flex for part time working This is an opportunity for an experienced C# .NET Software Engineer to join a successful, growing mid-sized company where good design skills and dedication to creating high quality code will be valued. Their product is used internationally by clients who depend on it to manage complex B2B interactions, portfolio management, and compliance with market legislation. Working as part of a small, collaborative team with other developers, product managers, and test engineers, and with involvement in all aspects of the software development lifecycle. The development process utilises a pragmatic blend of XP and Agile concepts in order to minimise process overheads and spend more time on creating great software. Requirements: A good degree in computer science or closely related subject from a well-ranked university Excellent software design and C#.NET development skills Additional skills in JavaScript, CSS, and HTML Ability to communicate complex concepts to your colleagues and stakeholders Full, existing, and unrestricted right to work in the UK Knowledge of at least a few of the following would be useful: ASP.NET, RESTful APIs , Entity Framework, SOLID design principles, MVC or MVVM design patterns, or CI/CD pipeline development. The role features a highly competitive salary and benefits package, and a friendly, collaborative culture that values and empowers their engineers and seeks to maintain a healthy work-life balance. This is predominantly an office-based role with at least three days per week working on-site. It's therefore not suitable for candidates seeking to work entirely remotely, and candidates need to be located within easy commuting distance of Cambridge so that they can attend at short notice should the need arise. Part time can be considered for those needing flexibility, but 3 days per week minimum office presence is still required. Another top job from ECM, the high-tech recruitment experts. Even if this job's not quite right, do contact us now - we may well have the ideal job for you. To discuss your requirements call (phone number removed) or email your CV. We will always ask before forwarding your CV. Please apply (quoting ref: CV27612 ) only if you are eligible to live and work in the UK. By submitting your details you certify that the information you provide is accurate.

Job Title: Full-Stack Developer Location: Bournemouth (x 5 days in office) Salary/Rate: 410 a day (Inside IR35) Start Date: April 2026 Job Type: Contract - 6 months Job Overview: We are seeking an experienced Senior Java / Python Full Stack Developer to design, develop, and maintain scalable enterprise applications at our client who is a leading global investment bank. The successful candidate will play a key role in delivering high-quality solutions using Java, Python, Spring Boot, AWS, and modern frontend technologies. You will collaborate with cross-functional teams to build robust, high-performance applications while ensuring code quality, scalability, and security across the development lifecycle. Key Responsibilities - Develop high-quality software design and architecture using AWS, SQL, Spring Boot, Java, Spring MVC, JavaScript, Python and MySQL. - Collaborate with cross-functional teams to define, design, and ship new features. - Some hands on knowledge on React JS, Redux, HTML5, CSS3 - Some exposure to frontend testing tools like Jest - Ensure the performance, quality, and responsiveness of applications. - Identify and correct bottlenecks and fix bugs. - Maintain code quality, organization, and automation. - Implement security and data protection measures. - Conduct software analysis, programming, testing, and debugging. - Oversee the development of documentation throughout the software development life cycle. - Provide technical guidance and support to team members. - Stay up-to-date with emerging technologies and industry trends. - Optimize applications for maximum speed and scalability. - Participate in code reviews to maintain high code quality standards. - Contribute to continuous improvement by investigating alternatives and technologies. If you are interested in this opportunity, please apply now with your updated CV in Microsoft Word/PDF format. Disclaimer Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies. Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.