Hydrogen UK Ltd

Hydrogen UK Ltd is seeking a Digital Business Analyst to support a digital transformation aimed at enhancing customer outcomes. This remote role, with occasional travel to Birmingham, requires a proactive collaborator who can gather and analyse business requirements to improve digital platforms. The ideal candidate will have experience in Financial Services and Agile environments, focusing on user-centric solution delivery.

Hydrogen UK Ltd is seeking a skilled NOC Engineer to join their 24/7 Operations Centre in Belfast. You will support critical infrastructure and resolve IT/network incidents, ensuring high-quality service delivery across a diverse client base. This role includes a structured shift pattern, opportunities for career progression, and comprehensive benefits, including a 30% shift allowance. The ideal candidate will have experience in a shift-based environment and be passionate about customer service.

Network Operations Centre (NOC) Engineer - 24/7 Shifts (Belfast) Located: onsite in NewtownAbbey, County Antrim Salary: £30,000 - £32,854 (+ 30% Shift Allowance/annum) We are seeking a skilled and customer-focused IT/Network Engineer to join our dynamic 24/7 Operations Centre team in Belfast. You will be part of a shift-based team supporting critical infrastructure, resolving IT/network incidents with precision, and ensuring high-quality service delivery across a wide client base. This role is ideal for someone who thrives in fast-paced environments, enjoys solving technical challenges, and is passionate about delivering excellent customer service. Shift Pattern: Days: 4 days on (7am-7pm), 4 days off repeated twice Nights: 4 nights on (7pm-7am), 4 nights off repeated twice Then cycle returns to days All candidates must have experience working in a shift-based operational environment. As a NOC Engineer, you will act as a key escalation point, monitoring and troubleshooting network and IT incidents, working within SLAs, supporting field engineers, liaising with third-party suppliers, and maintaining clear communication throughout the incident lifecycle. The role offers strong training and development opportunities, including funded apprenticeships, professional certifications, and clear career progression, alongside a shift allowance and a comprehensive benefits package. What's in it for You: Competitive salary Opportunity for career progression and development Professional training & apprenticeships (including funded qualifications and exams) 23 days annual leave (rising to 27 with service) + option to buy more leave Paid volunteering day for charity or community work Employee Network Groups supporting diversity and inclusion Company-matched pension scheme Cycle-to-work scheme 15 weeks' fully paid maternity, adoption, and shared parental leave

Hydrogen UK Ltd is looking for a NOC Shift Lead in Belfast to manage shift operations in a newly established Command Centre. The position offers a salary of £37,000 plus up to 30% shift allowance and involves leading a team in a live NOC environment. The ideal candidate must have a minimum of 2 years of people leadership experience, strong communication skills, and familiarity with SLA-driven environments.

Hydrogen UK Ltd. is seeking a Senior Kotlin Engineer in London to join a high-performing front-office engineering team. This hands-on role involves building and extending a real-time issuance platform within investment banking. Candidates should have substantial experience with Kotlin, event sourcing, and TDD. Ideal for engineers from financial services, you will work collaboratively in a mob programming setup to deliver high-quality backend services. Strong knowledge of cloud platforms such as GCP is necessary.

Senior Kotlin Engineer - London I am looking for a Senior Kotlin Engineer to join a high-performing front-office engineering team in London, working on a cloud-hosted platform used within Investment Banking Capital Markets. This is a hands-on backend engineering role focused on building and extending a real-time issuance platform. The system supports a large global user base during time-sensitive execution windows, where reliability, correctness and performance are critical. The team works with strong Extreme Programming principles, so this role will suit someone who enjoys collaborative engineering, shared code ownership, test-first development and continuous improvement. You will be expected to work closely with other engineers to design, build, test, integrate and support services in production. The platform already has foundational services in place, and the next phase of work will focus on expanding core business functionality across areas such as sales workflows, hedging processes and allocation features. Key Responsibilities You will be responsible for: Building and evolving backend services using Kotlin Working with event sourced and event driven architecture Contributing to system design, integration and production support Working in mobs as a primary delivery approach Practising test-driven development and continuous refactoring Keeping code clear, simple, maintainable and well-tested Supporting a high-availability production platform Using incidents, defects and feedback to improve reliability and design Delivering in small, testable increments within a collaborative engineering environment Skills and Experience Required I am looking for someone with: Strong commercial experience building backend services in Kotlin Experience with event sourced and event driven systems Deep understanding of XP engineering practices Strong TDD experience Experience with mob programming or highly collaborative development practices A disciplined approach to clean code and continuous refactoring Cloud experience, ideally with GCP or similar environments Experience with services such as GKE, Cloud Run, Cloud SQL, Memorystore, Artifact Registry, Cloud Logging or Key Management CI/CD and SDLC experience in an enterprise or regulated environment Confidence working with production systems where availability and correctness are essential Location London Ideal Background This would suit a senior backend engineer who has worked in financial services, capital markets, trading, fintech, banking or another high-availability environment where systems must perform reliably under time-critical conditions.

My client, a well known Retail business, is looking for a Senior Infrastructure Engineer with strong experience in identity modernisation, particularly around moving away from legacy directory services and helping shape a more secure, scalable, cloud first environment. This is an initial 6 month contract, Inside of IR35 and requires 2 days per week on site in Hatfield. We're looking for a hands on Infrastructure Engineer to support a hybrid Microsoft environment, with a strong focus on BAU, ticket resolution, and operational stability. This is not a senior/architect level role, we need someone who enjoys getting stuck into day to day support, resolving issues, and keeping systems running smoothly. Key Responsibilities Provide BAU / 2nd-3rd line support across Azure and Microsoft 365 environments Manage and resolve tickets, incidents, and service requests in line with SLAs Administer Azure resources via the Azure portal (VMs, networking, storage, identity) Support Active Directory / Entra ID, including users, groups, and access management Troubleshoot issues across Windows Server, M365, and cloud infrastructure Write and maintain PowerShell scripts for automation and admin tasks Support Intune / endpoint management where required Work closely with service desk and wider IT teams to ensure smooth operations Required Skills & Experience Strong experience in a BAU / support led infrastructure role Good working knowledge of Microsoft Azure (portal based admin) Solid PowerShell skills (scripting, automation, troubleshooting) Experience with Microsoft 365 (Exchange Online, Teams, SharePoint) Strong understanding of Active Directory / Entra ID Experience working in ticket driven environments (ServiceNow, Jira, etc.) Confident troubleshooting and resolving day to day infrastructure issues Nice to Have Experience with Intune / Autopilot / endpoint management Exposure to basic networking (DNS, DHCP, firewalls) Experience in regulated or enterprise environments

Hydrogen UK Ltd is seeking a Senior Mobile Engineer to develop high-quality iOS applications within a hybrid working model. This role requires strong experience in Swift and knowledge of iOS architecture patterns. You will collaborate with cross-functional teams, mentor other engineers, and contribute to technical strategies while ensuring coding standards are met. The hybrid model ensures effective teamwork, with a minimum of three office days required.

Lead Software Engineer - Java / Platform Engineering - Contract - Inside IR35 We're supporting a large-scale technology modernisation programme within a complex enterprise environment and are looking for several experienced Lead Software Engineers to join a high-performing engineering team. This is an opportunity to work on a greenfield platform build, helping shape and deliver a core middleware capability that will support multiple business critical services and applications. The Opportunity You'll join an established engineering function delivering modern platform and backend services within a cloud based environment. The work focuses on building scalable, production grade shared services and APIs within containerised AWS infrastructure. The programme is highly collaborative and suited to engineers who enjoy operating within cross functional teams alongside architecture, platform, and product stakeholders. Key Responsibilities Designing and building scalable Java based backend services Developing microservices and event driven solutions Contributing to platform and shared service architecture Building and maintaining production grade APIs Working within containerised AWS environments Collaborating with engineering, architecture, and product teams Providing technical leadership within an agile squad environment Required Experience Strong hands on Java development experience (Java 11+) Commercial experience with Spring Boot Microservices and event driven architecture experience Experience with Kafka or similar messaging technologies AWS cloud engineering experience Containerisation and Kubernetes/EKS exposure CI/CD pipeline and DevOps practices Experience operating within complex or regulated enterprise environments, ideally Financial Services What We're Looking For Engineers operating at Lead level technically Strong communication and stakeholder engagement skills Experience owning technical decisions and solution design Comfortable working autonomously within fast paced delivery environments Individuals who thrive within collaborative supplier/client engineering team Working Arrangement Hybrid working model London based delivery environment Regular on site collaboration expected (2 days per week) Additional Information Immediate to short notice availability preferred Multiple hires planned with potential for further team growth Fast moving interview and onboarding process

I'm working with a small, high-impact technology team who are rebuilding a core platform and modernising the infrastructure that sits behind a live, business-critical environment. This is a hybrid role with 1-day per month in the office. This is not a pure "keep the lights on" DevOps role. The work is much more hands on and engineering led, focused on AWS, RESTful APIs, microservice integrations, and helping move from an existing live platform into a new setup without a big bang cutover. You'll be joining at the start of a major technical rebuild, so there is plenty of scope to influence how things are built, integrated, migrated, and operated. What they are looking for: Strong AWS experience Experience building or integrating RESTful APIs Good understanding of microservices and service to service integration Platform engineering, DevOps, SRE, or cloud engineering background Experience working on migration or modernisation projects would be useful Ability to work in a small team and communicate clearly with non technical stakeholders Comfortable taking ownership rather than just working through tickets This could suit someone who has moved beyond traditional DevOps and enjoys working across cloud infrastructure, platform tooling, APIs, automation, and engineering led delivery. NO SPONSORSHIP AVAILABLE

Hydrogen UK Ltd is seeking a hybrid DevOps engineer to join their small, high-impact technology team. The role involves working on AWS, RESTful APIs, and microservice integrations in a hands-on environment. You will influence the technical rebuild, focusing on cloud infrastructure and engineering-led delivery, with responsibilities extending beyond traditional DevOps. The position emphasizes communication with non-technical stakeholders and ownership of tasks. Note: NO SPONSORSHIP AVAILABLE.

iOS Engineer - Inside IR35 - £550 per day - 3 days in London As a Senior Mobile Engineer, you will contribute to the development of best-in-class iOS applications, working closely with product owners, stakeholders, and engineering peers to deliver innovative, high-quality solutions. Reporting to a Principal Engineer, you will support the delivery of technical strategy and hands on implementation, while mentoring other engineers and helping to maintain high standards of engineering excellence. Key Responsibilities Develop new features and optimise existing functionality for iOS applications, ensuring they meet business and user requirements. Collaborate with product owners, stakeholders, and cross-functional teams to deliver high-quality mobile solutions. Participate in technical discussions to ensure solutions are robust, scalable, and fit for purpose. Mentor and support other engineers, promoting coding standards and engineering best practices. Assist the Principal Engineer in delivering technical strategy and ensuring alignment with business objectives. Conduct thorough code reviews to maintain quality, security, and performance standards. Lead by example, fostering a culture of continuous improvement, collaboration, and innovation. Present technical concepts and solutions to internal teams and contribute to strategic discussions. Skills & Experience Strong commercial experience developing native iOS applications using Swift. Excellent understanding of iOS architecture patterns (e.g. MVVM, MVC, VIPER). Knowledge of SOLID design principles and modern software engineering practices. Experience with SwiftUI and UIKit. Experience with unit testing using XCTest. Experience with UI automation testing using XCUITest. Experience with asynchronous programming, including Swift Concurrency (async/await) and Combine. Experience integrating RESTful APIs and working with JSON data. Experience with Continuous Integration and Continuous Deployment (CI/CD) pipelines; experience with CircleCI would be beneficial. Experience with dependency management tools such as Swift Package Manager, CocoaPods, or Carthage. Familiarity with App Store deployment processes and Apple's Human Interface Guidelines. Working Arrangement This role operates within a hybrid working model, requiring a minimum of three days per week in the office. Office-based collaboration supports innovation, knowledge sharing, and effective teamwork. Depending on business requirements, some roles may require additional office attendance.

Hydrogen UK Ltd is seeking a Senior Infrastructure Engineer to join their team in Hatfield for a 6-month contract. This role focuses on providing BAU support in a hybrid Microsoft environment, resolving day-to-day infrastructure issues, and ensuring operational stability. Applicants should have strong experience with Microsoft Azure and PowerShell scripting, along with a solid understanding of Active Directory and Microsoft 365. The position requires being on-site 2 days per week.

Network Operations Centre (NOC) Shift Lead - 24/7 Operations (Belfast) Location: Onsite, Newtownabbey, County Antrim Salary: £37,000 + 15% shift allowance Hours: 24/7 rotating shift pattern (4 days on 7am-7pm, 4 off, then 4 nights 7pm-7am, 4 off) We are looking for a NOC Shift Lead to join a newly established 24/7 Command Centre in Belfast. This is a hands on leadership role where you will coordinate shift activity, support engineers, and ensure smooth delivery of critical services across live operational environments. This role is best suited to someone with strong people leadership experience in an IT, service desk, or operational support environment, who is confident managing priorities, escalations, and team performance in real time. You will not be a technical escalation point, but you will be responsible for ensuring work is correctly prioritised, incidents are progressing, and service levels are maintained across the shift. Key responsibilities Lead and coordinate a shift team within a live NOC environment Allocate and prioritise workloads across incidents and service requests Act as escalation point for major incidents and operational issues Ensure SLA targets and service quality standards are consistently met Oversee shift handovers and ensure accurate operational continuity Provide clear communication across internal teams, engineers, and third parties Support incident management activity and ensure updates are accurate and timely Guide and support engineers during shift to maintain performance and flow What we are looking for Strong people leadership experience (minimum 2 years managing or leading teams) Experience in an IT support, service desk, NOC, or operational environment Confident communicator with the ability to manage pressure and competing priorities Experience working in SLA-driven or ITIL-aligned environments Understanding of incident management and service operations (preferred, not essential) Comfortable working in a 24/7 shift based rota Candidates must be eligible for SC clearance. What's in it for you £37,000 salary plus up to 30% shift allowance Opportunity to join a new Command Centre during a major growth phase Training and development support - fully funded certifications, training, and professional development opportunities Exposure to critical infrastructure and high availability services Structured 4 on / 4 off rotating day/night shift pattern 2 stage interview process (Teams + face to face) Please note: if you have already applied for this role with our client via any channel, including Hydrogen Group, we are unable to represent you for this opportunity.

Hydrogen UK Ltd is looking for a Lead Software Engineer specializing in Java and AWS for a contract position within a hybrid working model. You will join a high-performing engineering team focusing on scalable backend services and APIs within a cloud-based environment. Experience with Spring Boot, microservices, and containerization is needed, and candidates should thrive in cross-functional collaborative teams. Immediate availability is preferred, and there are multiple hires planned to expand the team.

6-month initial contract Inside IR35 1 day per week onsite in Welwyn Garden City Day rate highly flexible for the right person I'm working with a large retail business, and they are looking for a Security Engineer to help build and mature their Cyber Security Incident Response capability. This is a strategic and hands on role, working closely with the Cyber Security Incident Manager, SOC, DFIR, Threat Intelligence and Engineering teams to improve the organisation's readiness for high impact cyber incidents such as ransomware, insider threats and major security breaches. Key experience required CSIRT, SOC or Incident Response experience within a large enterprise environment. Building and improving incident response capabilities, processes, playbooks and runbooks. Supporting tabletop exercises, simulations and cyber readiness activities. Knowledge of frameworks such as NIST, ISO 27035 and MITRE ATT&CK. Experience with security tooling including SIEM, SOAR, EDR/XDR and cloud security platforms. Strong stakeholder management and documentation skills. Ability to drive continuous improvement across cyber incident response and resilience.

Hydrogen UK Ltd is seeking a Security Engineer for a 6-month initial contract based in Welwyn Garden City. This strategic role interfaces closely with various cyber security teams to enhance the organization's response to high-impact incidents. The ideal candidate will have experience in CSIRT and incident response within enterprise environments. A flexible day rate will be offered for the right person.