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A marketing agency is seeking a Senior QA to lead quality assurance practices across diverse projects. The ideal candidate will bring proven experience in QA, effective communication skills, and a passion for fostering a culture of quality. You will implement robust QA processes, driving continuous improvement to ensure exceptional delivery across all teams. This role offers competitive benefits and a collaborative environment.

Overview We're looking for a talented Web Developer with exceptional front-end skills to join our team. You'll play a key role in bringing websites, apps and digital experiences to life, working closely with designers, strategists and backend developers to create world-class interfaces. If you love crafting clean, accessible high-quality front-end code, enjoy solving complex user experience challenges, and want to work in a collaborative team that values creativity, innovation and quality, we'd love to meet you. Qualifications 2-4 years of front-end development experience Strong HTML, CSS/Sass and modern JavaScript, with experience in React or a similar framework Proven ability to build responsive, accessible and performant front-end experiences Confident working with APIs, Git workflows and modern build tools Excellent communication and teamwork skills within a multidisciplinary environment Highly organised, detail-driven and able to manage multiple tasks with consistency When You Join Our Team You'll access a great range of benefits including: 30 days' paid annual leave Up to 3 months' paid sick leave £1,000 annual training fund to support your growth and development £200 annual loyalty bonus to celebrate each year around the sun with StrategiQ Enhanced maternity & paternity pay To be eligible for some benefits you must meet certain criteria. APPLY NOW Ready to join a growing, dynamic Brand x Performance agency that has been recognised as a great place to work?

A leading climate-positive tech startup is seeking a fullstack software engineer to join their innovative team. This role offers an exciting opportunity to own the delivery of software features, primarily in Typescript, ReactJS, and PostgreSQL. The ideal candidate will have a minimum of 2+ years of development experience, strong problem-solving skills, and a passion for working on projects that make a climate impact. Flexible working arrangements are available, with an office in central London.

A leading tech company in the UK is looking for a Senior BackEnd Engineer to join their dynamic team. The role focuses on designing and implementing server-side logic and maintaining database architecture using Node.js and Python. The ideal candidate will have extensive experience with both SQL and NoSQL databases, be able to create RESTful APIs, and have a solid understanding of security practices. This position offers the chance to work on innovative projects and collaborate with a diverse team.

A dynamic digital agency is seeking a talented Web Developer to join their team. This role involves creating high-quality front-end code and collaborating with designers and backend developers to deliver exceptional digital experiences. Candidates should have 2-4 years of front-end development experience and strong skills in HTML, CSS/Sass, and JavaScript. The position offers generous benefits, including 30 days of paid leave and a training fund to support your development.

At Monterosa we're looking for a Senior BackEnd Engineer to join our team. Full-time Accra or UK At Monterosa, we are passionate about bringing people together through engaging and interactive experiences in entertainment and sport. Our mission is to enhance popular culture by delivering innovative solutions for some of the world's most beloved brands in media, sports, and entertainment. We strive to inspire and empower organisations to connect with their audiences in meaningful ways. Job summary As a Back-End Developer, you'll play a pivotal role in designing, implementing, and maintaining the server-side logic and database architecture that powers our applications. Leveraging your expertise in programming languages, database management, and server optimisation, you'll collaborate with cross-functional teams to deliver scalable, secure, and high-performance solutions. Your focus on efficiency, reliability, and data integrity will ensure seamless user experiences and robust back-end systems that meet the needs of our customers and business objectives. Key responsibilities Server-Side Development: Design, develop, and deploy server-side logic using languages such as Node.js and Python, to handle requests from front-end applications and external services. Database Management: Implement and optimise database schemas, queries, and transactions for relational (SQL) and non-relational (NoSQL) databases like MySQL, Redis, or MongoDB to ensure efficient data storage and retrieval. API Development: Create RESTful APIs and integrate third-party APIs for seamless communication between front-end interfaces, back-end systems, and external services while adhering to industry standards and best practices. Security and Performance Optimisation: Implement robust security measures, encryption techniques, and access controls to protect sensitive data and mitigate security threats. Optimise server performance through load balancing, caching strategies, and scalability planning to handle increasing user traffic and workload demands. Collaboration and Documentation: Collaborate with front-end developers, designers, QA, and project managers to translate project requirements into technical specifications. Document codebase, APIs, and deployment processes comprehensively to facilitate seamless collaboration and knowledge sharing within the team About you You're a skilled server-side developer who can design and deploy back-end logic using Node.js, Python. You're confident working with both SQL and NoSQL databases, optimising schemas and queries to ensure fast and reliable data access. You build clean, well-structured RESTful APIs and integrate third-party services with ease. Security and performance are core to your approach, you understand encryption, access controls, caching, and scalability planning. You collaborate well with front-end developers, designers, QA, and project managers, and you document your work clearly to support smooth delivery and knowledge sharing across the team. Qualifications: Solid experience in server-side development using Node.js and Python Strong understanding of relational and non-relational databases (e.g., MySQL, Redis, MongoDB) Proven ability to design and maintain RESTful APIs and integrate external services Knowledge of security best practices, including encryption, authentication, and access control Experience optimising server performance through caching, load balancing, and scalability planning Familiarity with version control systems such as Git Strong problem-solving skills and the ability to work collaboratively within cross-functional teams Clear and structured documentation skills A degree in Computer Science or a related field is beneficial but not essential, equivalent professional experience is welcome Apply for the job Do you want to join our team? Then we'd love to hear from you!

About Lune Blend frontend finesse with backend wizardry. The demand for sustainable logistics is growing and we are already working with leading innovators such as JAS Worldwide, Forto, Logixboard, and more. We are looking for an creative and strategic marketing manager to scale Lune's go-to-market in the logistics and supply chain sector! Lune is on the mission to make every product and service climate positive by default. We offer an end-to-end sustainable supply chains solution through our software & API for emissions intelligence, analytics, and high-quality carbon projects. We have raised $7.5m in seed funding from Crane, 13books Capital, and leading angel investors, such as the founder of N26, founder of Voi, founder of OysterHR. Who we are looking for If you're an ambitious fullstack software engineer who cares about tackling the climate crisis, we'd love to work with you! This role is a unique opportunity to be a core part of Lune's core team, to have a real impact on our mission and to define and scale the company into the future. As we grow, you'll have the opportunity to take on new responsibilities and help build a great company while tackling the greatest challenge of our time. Tech stack Our tech stack currently consists of typescript, reactjs (no redux ) and Postgresql. Applications are hosted on AWS EKS (Kubernetes). All infrastructure is provisioned with terraform. All code is rigorously tested automatically and deployed multiple times a day to production. What you'll do Own end-to-end delivery of features across Lune's entire technical stack Adapt to meet Lune's customers needs, whether that means working on our backend or frontend applications. Write maintainable and extensible code with high quality tests and documentation Work primarily with typescript Help us grow the team! You will fit this role if you Enjoy making decisions that will make an impact Want to work on climate impacting projects Thrive in a fast paced, early stage startup environment Are eager to learn and grow! Desirable skills and experience Hiring for all levels, but as a minimum 2+ years software development experience Enjoys working with both frontend and backend applications and in a constantly evolving environment Strong problem solving skills Ability to balance pragmatism and perfectionism Typescript experience is preferred but not required! What we offer Equity, as one of the core team members Competitive salary Comprehensive health insurance 25 days of holiday Quarterly full team get together and offsite Flexible working: office in central London, come in when you please, work from anywhere if you like

An innovative startup in ecological finance is looking for a Backend Software Engineer to help develop essential self-service tools for nature restoration projects. The role involves designing scalable systems, creating reliable APIs using TypeScript or Python, and managing data architecture within cloud environments. Candidates should have strong backend development skills, experience with PostgreSQL, and a passion for sustainability and conservation. Join a diverse team committed to tackling climate change and making a lasting impact on our planet.

At Great Yellow we're looking for a Software Engineer (backend) to join our team. About the job Great Yellow is connecting nature and finance, allowing nature restoration projects to run effectively with long term capital support. The world is experiencing rapid environmental degradation as a result of an extractive economic model, making businesses vulnerable as nature declines. A to regenerative practices is imperative to break this cycle. We're building a new generation of tools to make complex environmental programme data simple, clear, and actionable, to help organisations accelerate nature recovery across the UK. To do this, we're looking for a backend focused engineer, reporting to the Tech Lead and working closely with the Product Lead and Senior Software Engineer. This role is hands on and impact heavy: designing and shipping APIs and services, shaping our data model, and building reliable pipelines that turn messy, multi source inputs into trusted information. You'll focus on delivery and execution while keeping a pragmatic 0 1 mindset. You'll thrive here if you like owning problems end to end, from design doc and prototype to production rollout and iteration. Expect a modern, cloud first stack (AWS/Cloudflare), strong use of managed/serverless services, and a collaborative culture that values small, fast, well tested changes. What you'll do Build the first version of our digital platform. Start from scratch to develop an MVP our users can test, learn from, and help shape. Lay the technical foundations. Design a system architecture that works for today's needs and can scale as we grow. Establish a trusted system of record. Integrate, harmonise, and curate internal and external data to power our platform. Design and ship backend services and APIs. Implement reliable RESTful services (preferably TypeScript/Node.js or Python), and build secure integrations with third party data providers. Own our data architecture. Define data models and relational schemas (PostgreSQL) and support analytics/AI via warehouses/lakes where needed. Build event driven data pipelines. Create robust ETL/ELT workflows and asynchronous processing using queues/message brokers. Operate in the cloud with reliability. Deploy and run services on AWS/Cloudflare using managed/serverless components, with security, monitoring, and cost efficiency baked in. Collaborate and raise the bar. Work tightly with Tech/Product and peers, champion code quality, testing, documentation, and continuous improvement. About you Experience: Previous experience of backend or data focused software engineering experience delivering production systems in fast paced environments, including 0 1 product work. Skillset: Proficiency in backend development (preferably TypeScript/Node.js, otherwise Python, Java/Spring Boot or similar), designing and operating RESTful services and third party integrations. Data: Strong data modelling and SQL skills with PostgreSQL; experience building end to end ETL/ELT pipelines and event driven processing using queues/brokers. Cloud: Hands on cloud experience (AWS and/or Cloudflare). Versatility: Demonstrate versatility and adaptability in a fast paced startup environment, comfortable managing shifting priorities and contributing to foundational processes that are built to scale. Communication: Excellent cross functional communication skills, with the ability to translate business goals and product requirements into technical solutions. Passion for sustainability and conservation finance, with a commitment to tackling climate change and biodiversity loss. Beneficial Skills BSc or similar in Computer Science or related field Familiarity with Graph Databases (e.g., Neo4j, Neptune) Knowledge of Domain Driven Design (DDD) principles Experience with GraphQL for API development Experience with data warehousing solutions (e.g., Redshift, BigQuery, Snowflake) Proficiency in a secondary backend language such as Python (e.g., FastAPI, Django) or Java (e.g., Spring Boot) Familiarity with infrastructure as code, security fundamentals, monitoring/alerting, and cost aware operations Why Join Great Yellow? Be part of an innovative start up that's breaking new ground in finance and ecological restoration Engage in meaningful work with the potential to make a lasting impact on the planet Work alongside a passionate and diverse team in an environment that values flexibility, collaboration, autonomy, and growth We're big believers in flexibility - work where you do your best thinking - but we also value getting together in our office to share ideas (and coffee) Apply for the job Do you want to join our team as our new Software Engineer? Then we'd love to hear about you!

A leading biotechnology firm in London is looking for a Senior Platform Engineer to manage Kubernetes environments and streamline infrastructure for biologists and machine learning engineers. The ideal candidate will have extensive experience with Linux, deep learning optimization, and automation tools. This role offers competitive compensation, equity options, and a fun, supportive work environment focused on collaboration.

About Us At Basecamp Research, we tap the planet's unexplored biodiversity to solve some of biotechnology's hardest problems and show the enormous value hidden in nature. We have built one of the world's largest and fastest-growing metagenomic datasets, sourced from our global expeditions and partnerships. Using this extensive resource, our team runs petascale deep learning and bioinformatics pipelines across cloud and HPC infrastructure to uncover novel enzymes, explore new biology, and solve complex biotechnology challenges for our partners. We have a strong focus on automation and scalability, enabling us to keep pace with our rapid growth and focus on high impact technical challenges. We work closely with some of the most renowned tech companies and organisations, including NVIDIA, The Broad Institute (Harvard), Microsoft and AWS. We're an inclusive, flexible workplace, where biologists, engineers, data and machine learning scientists, and field explorers are united by a sense of adventure and a belief that nature has already designed the solutions to our planet's greatest challenges, we just need to uncover them! If you feel passionate about the power of biology to show the inherent value of nature and to build a better world, we'd love to hear from you. The Role We are looking for an experienced Platform Engineer to join the team. The role will be full time, based physically in our central London office. As a Senior Platform Engineer, you'll own our hybrid Kubernetes fleet (on prem + AWS) and build the self service infrastructure that empowers biologists and ML engineers to work more effectively. You'll report to the Platform Engineering Lead, drive security and reliability improvements, and architect new tooling to streamline operations. You will be working alongside leading data scientists, bioinformaticians, and ML scientists, to build the largest and most diverse metagenomic dataset known to the industry. You will be instrumental in building and scaling our infrastructure to leverage our data asset for next generation therapeutics, deep learning models, and some of the industries toughest biotechnology challenges. About you Own and operate our on-premise and cloud environments, in particular our Kubernetes clusters (security, monitoring, upgrades and automation) Deep knowledge of Linux and container based systems and how they work (namespaces, CNI, networking etc.) Experience operating clusters of NVIDIA GPUs and complex networking configurations (IB, High speed fabrics, multiple CNIs etc.) Ability to work across the stack to troubleshoot and diagnose problems (from application logs down to TCP/IP) Experience working with Deep Learning workloads, training models, serving models through inference platforms and optimising hardware and systems for models. Fluency of at least one coding language (Python, Go or similar) with experience of building and deploying applications on top of Kubernetes. Passion for automating manual and repetitive tasks (configuration, patching, etc.) using Terraform, Ansible or similar Curiosity about biotechnology and working with enormous biological datasets and systems At least 4 years of experience in industry working with the above tools and technologies. Nice to Have Experience with other parts of our tech stack (Clickhouse, Postgres, Datadog, Dagster, Temporal, AWS, Gitlab and RunAI) Any domain knowledge within Life Sciences and Biotech/Techbio, specifically around high throughput sequencing, ML models, and bioinformatics. What we can offer in return The opportunity to be a key member in an exciting, dynamic, and fast-moving field. A fun, flexible, and supportive work environment in the centre of London, and an emphasis on collaboration and personal development. Highly collaborative culture, we always work cross team and cross function, with engineers, data scientists, and biologists working directly together to tackle complex issues. Competitive compensation including equity Comprehensive medical cover with AXA Critical Illness and Group Income Protection Pension Scheme Generous PTO Enhanced parental policy Childcare scheme with YellowNest Bike2Work Scheme Apply for the job Do you want to join our team as our new Senior Platform Engineer? Then we'd love to hear about you!

At Monterosa we're looking for a Senior JavaScript Developer to join our team. At Monterosa, we are passionate about bringing people together through engaging and interactive experiences in entertainment and sport. Our mission is to enhance popular culture by delivering innovative solutions for some of the world's most beloved brands in media, sports, and entertainment. We strive to inspire and empower organisations to connect with their audiences in meaningful ways. Job summary As a Front-End Engineer at Monterosa, you will be responsible for developing innovative and engaging user interfaces for our digital products, ensuring they align with Monterosa's overall goals. You will utilise your expertise in front-end technologies, responsive design, and advanced tooling to create high-quality, user centric experiences. Key responsibilities User Interface Development: Designing and developing intuitive, responsive user interfaces using React and other front end technologies. Ensure that the UI meets design specifications, is visually appealing, and provides an optimal user experience across various devices and screen sizes. Integration with Backend Services: Collaborating with backend engineers to integrate front end interfaces with backend APIs for data communication, authentication, and error handling. Ensure seamless interaction between the front end and back end components to deliver a cohesive user experience. Performance Optimisation: Implementing performance optimisation techniques such as code splitting, lazy loading, caching, and network optimisation to improve the speed and efficiency of front end applications. Profile and analyse performance bottlenecks to identify areas for improvement and enhance overall responsiveness. Code Quality and Maintenance: Writing clean, maintainable code according to industry best practices and coding standards. Regularly refactor and optimise existing codebase to improve readability, scalability, and maintainability. Conduct code reviews and collaborate with team members to ensure code quality and consistency. Continuous Learning and Innovation: Stay updated with the latest front end technologies, trends, and best practices. Experiment with new tools and techniques to innovate and enhance the front end development process. Share knowledge and mentor junior team members to foster a culture of continuous learning and improvement. About you You are a seasoned Frontend Developer with expertise in React.js, TypeScript, and modern frontend technologies to join our team. You have a strong eye for detail and a passion for building high performance, scalable, and maintainable web applications. You have experience with testing frameworks like Jest, React Testing Library, or Cypress, ensuring code quality and stability. Knowledge of CI/CD pipelines, Git workflows, and containerisation with Docker is a plus. You enjoy collaborating with designers, backend developers, and stakeholders to bring seamless digital experiences to life. If you are passionate about frontend development and staying up to date with the latest technologies, Qualifications Core React & Frontend Development Strong understanding of React fundamentals, including JSX, Virtual DOM, and component based architecture. Experience with responsive design techniques and tools to ensure optimal user experiences across different devices. Proficiency in HTML5, CSS3 (Flexbox, Grid), and modern CSS frameworks (e.g., Tailwind CSS, Styled Components, Material UI). JavaScript & TypeScript Expertise Mastery of advanced JavaScript (ES6+) concepts, including async/await, promises, closures, and functional programming. Hands on experience with TypeScript for type safety and scalable frontend architecture. State Management & API Integration Deep knowledge of React state management solutions like Redux, Redux Saga, Zustand, or React Query. Experience integrating and handling RESTful APIs and GraphQL, including authentication, error handling, and security considerations. Performance Optimisation & Tooling Expertise in frontend performance optimisation techniques, including code splitting, lazy loading, memoisation, and caching. Familiarity with Webpack, ESLint, Prettier, Vite, or ESBuild to enhance development workflows. Understanding of browser security constraints, accessibility (WCAG standards), and best practices for frontend security (XSS, CSRF, CORS, SQL Injection protection). Debugging & Profiling Advanced experience with browser developer tools, Chrome DevTools, Lighthouse, and performance monitoring tools to analyse memory usage, CPU performance, and network activity. Ability to diagnose and resolve frontend performance bottlenecks efficiently. Apply for the job Do you want to join our team as our new Senior Front End Engineer? Then we'd love to hear from you!

Build, test & deploy production-grade AI Agents, that build and run autonomous businesses. Full-time About the job At Honu , we're building the platform for Autonomous Businesses. We're looking for an AI engineer to design, build, test, and deploy production-grade AI agents running on top of Honu's proprietary Decision Infrastructure Framework. You'll own agents end-to-end-from backend logic to frontend delivery-and become our in-house expert on Agentic Systems, and Frameworks. What You'll Do Build autonomous agents using modern agentic frameworks, tools and libraries like LangChain , Google ADK . Interface with A2A and MCP protocols Deploy to production using Docker, Terraform, GCP , with proper monitoring and observability Implement clean, tested Python code and maintain CI/CD pipelines Apply core data engineering tools: SQL, DBT, BigQuery What You Bring System thinker, good communicator, and strong work ethic. Curious, pragmatic, and ready to own production-grade systems end-to-end 1+ years of professional software engineering experience Solid Python skills and hands-on experience with agent frameworks (LangChain, Google ADK, etc ) Experience using Pydantic , and FastAPI Experience with SQL , DBT , and BigQuery Cloud infrastructure experience (preferably GCP) with Docker & Terraform Experience with AI development environments like Cursor, Windsurf, Claude Code TDD mindset and comfort with Agile/XP workflows (pairing, code reviews, CI) Nice to Have Exposure to multi-agent systems, memory, or RAG pipelines Develop and maintain agent-facing UIs with React & TypeScript Understanding of agent monitoring, safety, and governance best practices Apply for the job Do you want to join our team as our new Software Engineer (AI Agents)? Then we'd love to hear about you!