41 senior platform engineer jobs found in London

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 APPLICATION SECURITY ENGINEER AGENTIC AI SECURITY PLATFORM £800 - 900 per Day (Dependent on Experience) Our Client is a major Financial Services Organisation undertaking a major Security Architecture Programme. They are now entering the Production Build Phase of an Agentic Application Security Agent that will fundamentally change how their Application Security is Delivered within the SDLC click apply for full job details

Senior Software Engineer (Platform focused) | Contract | £500 per day Initial 3 month engagement | Outside IR35 | 3 days per week onsite central London Seed-stage AI-native company taking on a major UK regulated services market. Backed by top-tier European VCs, founders include the team behind one of the UK's best-known modern consumer brands. Public launch later this year. Working MVP exists. The job is to take it from prototype to the platform that supports launch and scale. You will: Design and own the architecture of the platform - the state machine, workflow engine, API layer and data model that orchestrate every transaction Own infrastructure, deployments and CI/CD - ensure the platform is reliable, scalable and fast as they grow from launch to thousands of concurrent transactions Build and maintain security practices appropriate for a regulated firm - data encryption, access controls, audit logging, penetration testing You'll need: 5+ years...

AI Engineer | Hybrid | London | Outside IR35 | 6+ Months   Cititec are working with a global financial markets organisation on a large scale data and platform transformation.   They are looking for a Senior AI Engineer to help accelerate the migration of a complex data estate from Oracle to a Microsoft centric architecture across Azure, Cosmos DB, Microsoft Fabric and Azure Data Factory.   The role will focus on applying AI and GenAI to improve developer productivity and engineering throughput, particularly across data migration, code generation and developer tooling. This includes deploying AI agents and AI assisted development tools within the Azure ecosystem.   This is a high impact role operating across a large engineering environment, helping scale modern engineering practices and AI enabled development across a significant developer base.   Job ID  1

MLOps Engineer, Palantir Platform Fully Remote 6 Month Contract Outside IR35 £550 to £650 per day The Company They are a large, data driven organisation operating at scale, with a strong focus on using advanced analytics and machine learning to inform decision making. The business invests heavily in its data platforms and engineering capability, creating an environment where robust MLOps practices are essential. Teams are collaborative, delivery focused and used to working with senior technical stakeholders. The Role and Deliverables Design, build and maintain MLOps pipelines on the Palantir Foundry platform. Enable reliable deployment, monitoring and retraining of machine learning models in production. Partner with data scientists and engineers to operationalise models efficiently. Implement best practices around CI/CD, model versioning and data quality. Support platform optimisation, scalability and reliability across...

Senior Data Engineer (Contract) Remote (UK) 10 months £600 - £650 per day OUTSIDE IR35 A leading data consultancy is partnering with a large enterprise organisation to deliver a major cloud data platform programme. As part of this transformation, we are looking to bring in an experienced Snowflake Technical Lead to take full ownership of a key delivery workstream. This is a genuinely hands-on leadership role. It is best suited to an engineer who enjoys designing and building production-grade data solutions, rather than someone who wants to operate purely in architecture review or governance discussions. You will be trusted with real autonomy over implementation decisions while remaining clearly accountable for delivery outcomes Project Context This is a decommissioning and migration project. The organisation is retiring a Legacy data setup and rebuilding its pipelines on Snowflake. The work spans the full picture, with a meaningful element of data modelling and design...

?? Alteryx Lead ?? Flexible | ? 3-Month Contract | ?? Outside IR35 We're looking for a seasoned Alteryx expert to lead a high-impact transformation project-moving a complex, one-off book profitability model into a scalable, BAU-ready solution. ?? A leading consulting firm has built a sophisticated Python-based profitability cube. Now we need you to operationalise it-leveraging Alteryx (with Python where needed) to create a robust, automated, and auditable solution for Finance. ?? What you'll be doing Turn manual into magic: Build production-grade Alteryx workflows that replace spreadsheets with reliable, auditable automation across reconciliations, close, and forecasting Own the platform: Manage Alteryx Server (scheduling, permissions, monitoring) and ensure secure, SOX-ready governance (SSO/IAM, audit trails) Engineer accuracy: Design strong data pipelines using advanced SQL (joins, CTEs, window functions), reconciliation checks, and incremental loads Keep...

Senior Frontend Engineer (Contract) Contract Length: 3-6 months Rate: £550 - £600 p/d IR35 Status: Outside IR35 Location: Remote-first with occasional London visits We're supporting an AI product company building a highly interactive, browser-based collaborative platform used by creative and design-focused teams globally. They're looking for a Senior Frontend Engineer to help scale and evolve a complex Front End application that combines Real Time collaboration, advanced rendering, multiplayer state management, and AI-powered workflows. This is not a standard CRUD-style React contract. The environment is heavily focused on Front End engineering quality, performance, interaction design, and solving technically challenging browser problems. The Role You'll work closely with a small, high-calibre engineering team on a sophisticated web application that includes: Real Time collaborative experiences Advanced canvas-based interaction AI-assisted workflows Complex...

Principal Java Engineer (Individual Contributor) 6-Month Contract | Outside IR35 | Paddington (3 days/week) We are partnering with a leading UK retail organisation on a significant payments and platform transformation. We seek a Principal Java Engineer to join as a hands-on individual contributor, playing a pivotal role within a dynamic engineering team. This technically demanding position centres on designing, building, and scaling high-volume, mission-critical payment systems. You will remain deeply involved in coding while influencing design and technical direction. The Role As a Principal Java Engineer, you will design and develop scalable Back End services that facilitate secure payment transactions at scale. The environment is modern, cloud-native, and prioritises event-driven architecture and high performance. Key Responsibilities Design and develop Back End services using Java (Spring Boot or Micronaut) Build systems supporting secure, high-volume payment...

Lead/Staff Full-Stack Engineer (Individual Contributor Focus) 6-Month Contract | Outside IR35 | Paddington (3 days/week) We are partnering with a prominent consumer platform undergoing a major digital transformation and seek a Lead/Staff Full-Stack Engineer to join as a hands-on contributor with strong end-to-end ownership. This role involves full-stack development across Back End and Front End, coupled with technical ownership of solutions, focusing on building scalable, high-quality systems within a modern cloud-native environment. About the Role As a Lead/Staff Full-Stack Engineer, you will design and deliver comprehensive solutions spanning Back End services, Front End applications, and cloud infrastructure. You will work in a modern, collaborative environment prioritising performance, reliability, and user experience. Key Responsibilities Design and develop full-stack solutions balancing Back End robustness with exceptional user experiences Build and maintain...

SENIOR APPLICATION SECURITY ENGINEER AGENTIC AI SECURITY PLATFORM £800 - 900 per Day (Dependent on Experience) Our Client is a major Financial Services Organisation undertaking a major Security Architecture Programme. They are now entering the Production Build Phase of an Agentic Application Security Agent that will fundamentally change how their Application Security is Delivered within the SDLC click apply for full job details

AI Engineer | Hybrid | London | Outside IR35 | 6 + Months Cititec are working with a global financial markets organisation on a large scale data and platform transformation. They are looking for a Senior AI Engineer to help accelerate the migration of a complex data estate from Oracle to a Microsoft centric architecture across Azure, Cosmos DB, Microsoft Fabric and Azure Data Factory. The role will focus on applying AI and GenAI to improve developer productivity and engineering throughput, particularly across data migration, code generation and developer tooling. This includes deploying AI agents and AI assisted development tools within the Azure ecosystem. This is a high impact role operating across a large engineering environment, helping scale modern engineering practices and AI enabled development across a significant developer base.

AI Engineer | Hybrid | London | Outside IR35 | 6+ Months Cititec are working with a global financial markets organisation on a large scale data and platform transformation. They are looking for a Senior AI Engineer to help accelerate the migration of a complex data estate from Oracle to a Microsoft centric architecture across Azure, Cosmos DB, Microsoft Fabric and Azure Data Factory. The role will focus on applying AI and GenAI to improve developer productivity and engineering throughput, particularly across data migration, code generation and developer tooling. This includes deploying AI agents and AI assisted development tools within the Azure ecosystem. This is a high impact role operating across a large engineering environment, helping scale modern engineering practices and AI enabled development across a significant developer base.

ML Engineer Contractor - AI-Driven Automation Our client, a global digital E-commerce company is looking for an experienced ML Engineer contractor to help build a fully automated pricing platform across various international locations. This is an AI-first role. They are looking for someone who thinks beyond traditional ML pipelines and brings strong experience in intelligent automation, AI agents, orchestration, and production-grade decision systems. You'll work closely with the Data Science, Engineering, and Analytics teams to design and deliver automated workflows that move model recommendations into production systems safely, reliably, and at scale. What You'll Do Design and build automated ML pipelines and orchestration workflows Implement AI agent and LLM-powered automation capabilities Deliver pricing outputs into AWS S3 for downstream system integration Support phased rollout from manual approvals to full automation Partner with senior stakeholders, Ccntribute...

Senior Infrastructure Engineer - Farnborough - Highest Security Clearance Required - £550 - £650 Outside IR35 A growing technology organisation operating within highly secure environments is looking to hire both Mid-Level and Senior Infrastructure Engineers to support and evolve critical infrastructure platforms across complex programmes. These opportunities suit engineers who enjoy working in security-conscious environments where resilience, availability and compliance are central to day-to-day operations. Senior Infrastructure Engineer The senior role is suited to experienced infrastructure engineers capable of leading technical delivery, mentoring others and owning critical infrastructure services. You'll ideally have: Experience designing and delivering secure infrastructure solutions Strong ownership across infrastructure lifecycle management Ability to lead technical problem solving and platform improvement initiatives Experience working within highly secure or...

Senior Infrastructure Engineer - Farnborough - Highest Security Clearance Required - £550 - £650 Outside IR35 A growing technology organisation operating within highly secure environments is looking to hire both Mid-Level and Senior Infrastructure Engineers to support and evolve critical infrastructure platforms across complex programmes. These opportunities suit engineers who enjoy working in security-conscious environments where resilience, availability and compliance are central to day-to-day operations. Senior Infrastructure Engineer The senior role is suited to experienced infrastructure engineers capable of leading technical delivery, mentoring others and owning critical infrastructure services. You'll ideally have: Experience designing and delivering secure infrastructure solutions Strong ownership across infrastructure lifecycle management Ability to lead technical problem solving and platform improvement initiatives Experience working within highly secure or...

Infrastructure Engineer - Farnborough - Highest Security Clearance Required - £550 - £650 Outside IR35 Mid-Level Infrastructure Engineer Senior Infrastructure Engineer A growing technology organisation operating within highly secure environments is looking to hire both Mid-Level and Senior Infrastructure Engineers to support and evolve critical infrastructure platforms across complex programmes. These opportunities suit engineers who enjoy working in security-conscious environments where resilience, availability and compliance are central to day-to-day operations. Infrastructure Engineer The mid-level role is suited to engineers looking to deepen their experience within complex, high-security environments while working alongside senior technical teams. You'll ideally have: Experience supporting enterprise infrastructure environments Strong troubleshooting and operational support capability Exposure to virtualisation, networking and secure systems...

Senior Scientific Data Scientist / Pipeline Engineer Remote / Hybrid Oxford 6 Month Contract Outside IR35 £400 to £550 per day Overview A technology-enabled drug discovery company is looking for a Senior Scientific Data Scientist to design, build and maintain the analytical pipelines that power its data-driven discovery platform. The business combines automated wet-lab experimentation, proprietary analytical pipelines and deep scientific expertise to generate high-quality, reproducible biological datasets at scale. This data supports AI-driven discovery work across areas including oncology, immunology and neurodegeneration. This role would suit a scientist-turned-coder or scientific data scientist with strong Python skills, statistical modelling experience and a background working with bioassay or experimental biology data. The Role You will build and improve Python-based analytical pipelines for diverse bioassay datasets, including biochemical,...

Senior Scientific Data Scientist / Pipeline Engineer Remote / Hybrid Oxford 6 Month Contract Outside IR35 £400 to £550 per day Overview A technology-enabled drug discovery company is looking for a Senior Scientific Data Scientist to design, build and maintain the analytical pipelines that power its data-driven discovery platform. The business combines automated wet-lab experimentation, proprietary analytical pipelines and deep scientific expertise to generate high-quality, reproducible biological datasets at scale. This data supports AI-driven discovery work across areas including oncology, immunology and neurodegeneration. This role would suit a scientist-turned-coder or scientific data scientist with strong Python skills, statistical modelling experience and a background working with bioassay or experimental biology data. The Role You will build and improve Python-based analytical pipelines for diverse bioassay datasets,...

Lead Backend Software Developer (Contract) London, Outside IR35 £500- £600 per day This is an exciting opportunity to join a fast-moving engineering function at a pivotal moment of technical uplift. They are investing heavily in strengthening their core platforms and commercial data systems, creating a strong mandate for senior engineers to step in, lead, and make an immediate impact. The Company They are a growing digital gaming organisation operating across multiple markets, currently modernising their backend ecosystem. With distributed teams across the UK and Europe, they are building scalable platforms that support a variety of customer-facing and internal products. Engineering quality, strong technical leadership, and delivery excellence are central to their transformation. Contractors join at a time when technical ownership is expanding in-house, creating real scope to shape systems and standards. The Role and Deliverables: * Lead...