7 site reliability engineer jobs found in London

Lead Data Engineer Rate: £450 per day (Outside IR35) Duration: 6 months Start: ASAP Location: Hybrid – 1 day per week on-site in Stratford, London A leading technology consultancy is seeking a Lead Data Engineer to join on an initial 6-month engagement. The organisation specialises in accelerating digital delivery and helping businesses build high-performing digital products and teams. With a strong presence across the UK, Europe, and the US, the company operates a regional model that fosters close collaboration with clients, enabling impactful and scalable digital solutions. The Lead Data Engineer will act as a technical authority across key initiatives, providing leadership and mentorship while driving the design and delivery of robust, scalable data solutions. Key Responsibilities Act as technical lead on key initiatives, providing guidance and mentorship to engineering teams Collaborate with Product Managers, Project Managers, and...

Platform Engineer | Trading Firm Central London | 3 days on site Outside IR35 | Up to £650 per day A trading firm in central London has rolled out a business wide data platform and now needs a senior Platform Engineer to take full control of the platform layer. Kubernetes is the heart of this environment and they need someone who can run it with confidence, precision and zero drama. What they need you to bring Serious Kubernetes depth covering cluster design, workload orchestration, autoscaling strategies, multi cluster operations, network policy, resource tuning and deep debugging across pods, nodes and the control plane Deep Linux fluency with the ability to harden, tune and own production environments from top to bottom Strong SQL engineering skills covering schema design, performance tuning and high throughput optimisation Solid C# background with clean, maintainable service patterns Ability to design, build and refine CI/CD...

Senior Fullstack Engineer £450-550 per day 6 months Outside IR35 Hybrid - 2 days per week on site (London) We're supporting a high-growth, AI-driven product business building a scalable platform from the ground up. They operate as a small, high-calibre team with high standards, low bureaucracy, and real ownership. They're looking for a Senior Fullstack Engineer (Back End leaning) to take responsibility for core Back End systems and help shape product direction in fast-moving environment. This is a role for someone who is comfortable building without perfect specs and takes initiative naturally. Requirements Strong Node.js and GraphQL (NestJS) experience PostgreSQL, Prisma, and solid data structures/OOP fundamentals Experience building high-concurrency, event-driven systems GCP experience (Terraform desirable) Experience working with AI/LLMs in production environments Strong focus on system reliability (monitoring, alerting, logging, testing,...

Platform Engineer | Trading Firm Central London | 3 days on site Outside IR35 | Up to £650 per day A trading firm in central London has rolled out a business wide data platform and now needs a senior Platform Engineer to take full control of the platform layer. Kubernetes is the heart of this environment and they need someone who can run it with confidence, precision and zero drama. What they need you to bring Serious Kubernetes depth covering cluster design, workload orchestration, autoscaling strategies, multi cluster operations, network policy, resource tuning and deep debugging across pods, nodes and the control plane Deep Linux fluency with the ability to harden, tune and own production environments from top to bottom Strong SQL engineering skills covering schema design, performance tuning and high throughput optimisation Solid C# background with clean, maintainable service patterns Ability to design, build and refine CI/CD...

Senior React Engineer (Contract) Location: London (hybrid) Day rate: £500–£650 (outside IR35) Start: ASAP Duration: 6 months (likely extension) Overview We’re working with a well-funded, product-led business undergoing a significant evolution of its frontend platform. This is not a greenfield “build a landing page” role. This is a core product engineering position , focused on building scalable, high-performance user experiences used daily by customers. You will be joining a team that values clean architecture, strong engineering standards, and pragmatic delivery . What you’ll be doing Building and scaling complex web applications using React and Next.js Contributing to a modern frontend architecture (component-driven, modular, scalable) Working closely with product, design and backend teams to deliver end-to-end features Improving performance, reliability and maintainability across the frontend codebase Writing clean,...

AI / LLM Engineer (Copilot, Azure AI) Leeds (Hybrid – 3 days onsite) | Contract | Outside IR35 | Competitive Day R ate We’re looking for a hands-on AI / LLM Engineer to design and deliver enterprise-grade Generative AI and Copilot solutions within a modern cloud environment. This role sits at the intersection of AI engineering, architecture, and platform delivery, with a strong focus on building scalable, secure, and production-ready AI systems. What You’ll Be Doing Design, build and deploy Copilot solutions, AI agents and LLM-powered applications Develop end-to-end LLM workflows (prompt orchestration, automation, integrations) Implement and optimise RAG pipelines, embeddings and vector search strategies Integrate AI solutions with enterprise systems, APIs and data platforms Build scalable and reusable components (prompt libraries, connectors, templates) Apply secure-by-design and responsible AI practices (guardrails, monitoring, auditability)...

Outside IR35 Contract - Senior/Lead Kotlin Engineer – Backend / Distributed Systems - £700-800/day Tier-One Global Investment Bank | London A tier-one global investment bank is expanding a new engineering group responsible for building modern digital financial platforms from the ground up. This team operates with the autonomy and pace of a start-up, backed by the scale and resources of one of the world’s largest financial institutions. Engineers work in small, highly collaborative teams designing and operating systems that power critical financial services used by millions of customers. This is a 6-month rolling contract, on a programme of work estimated to last 2-3 years. We’re looking for experienced Senior and Lead backend engineers who specialise in server-side Kotlin on the JVM , with a strong interest in building reliable distributed systems and scalable cloud platforms. You’ll help design and build high-performance backend services, working closely...