18 senior platform engineer jobs found in London

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

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 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...

Senior Full Stack Developer & AI Engineer Fully Remote Outside IR35 £440- £540 Per Day Immediate Start Date 4-6 Weeks long The Company They are a specialist technology consultancy focused on delivering AI-driven solutions for large, complex organisations. Their work centres on turning advanced AI capabilities into practical, production-ready applications that deliver measurable business value. The environment is collaborative, fast-moving, and driven by technical excellence. Engineers are trusted to lead, influence, and make meaningful decisions. The Role and Deliverables Lead the design and build of end-to-end AI-powered applications, from initial architecture through to production deployment. Architect scalable backend services and intuitive frontend interfaces that expose AI capabilities to enterprise users. Design and implement agentic AI systems, including orchestration patterns, tool integration, and evaluation...

🚨 Data Engineer | London Hybrid | £450–£500pd Outside IR35 | 6 Months Initial I’m working with a well-established, independently run alternative asset manager with 25+ years in the market and over $5bn AUM. They operate across London, New York, Hong Kong, Geneva, Dubai, Singapore and the BVI, supporting institutional investors, private banks, family offices and HNWIs across hedge fund and private equity strategies. They’re now looking for a Data Engineer to join a small, high-output engineering team building and running a proprietary cloud-native data platform. This is an initial 6-month contract, outside IR35, offering £450–£500 per day. This is not a “wait for a ticket” type of contract. You’ll work directly with stakeholders across operations, research and investment, getting under the skin of how data moves across the business, spotting inefficiencies, and fixing the things that slow people down. You’ll be working on: • Production pipelines...

Automation Test Lead - Salesforce UK-based (Remote) contract role (£500 per day outside IR35 6-month Contract ?Lead the end-to-end test automation strategy for a large-scale global Salesforce transformation programme covering Sales Cloud, Service Cloud, Marketing Cloud, and CPQ/RCA implementations. ?Design, build, maintain, and scale robust automation frameworks using Playwright, ensuring high test coverage, stability, and reusability across multiple Salesforce platforms. ?Drive automation of complex Salesforce business processes including lead conversion, opportunity management, case management, customer journeys, approvals, and CPQ workflows. ?Develop automated UI, API, and integration test suites across Salesforce and connected enterprise systems, validating data integrity and end-to-end business flows. ?Provide hands-on technical leadership to QA engineers and cross-functional teams, establishing automation best practices, coding standards, and CI/CD quality...

Network Security Engineer - 3-6 months - Outside IR35 We're hiring a Network Security Engineer to join one of our customers. This is a hands-on role for a highly skilled network and security engineer with strong service provider experience. Responsibilities: Manage and optimise the core network for performance, resilience, and uptime. Support core firewalls, switches, and routing platforms across data centre and edge environments. Automate network tasks and provisioning using Python, Ansible, and REST APIs. Maintain routing, peering, IP addressing, and network policies. Work closely with SOC/NOC teams to ensure security, stability, and compliance. Follow and enforce change control and operational best practices. Design and deploy Managed LAN, Wireless, and Security solutions. Deliver Fortinet solutions including FortiGate, FortiSwitch, FortiAP, FortiManager, and FortiAnalyzer. Implement Cisco routing and Cisco Meraki solutions for customer environments....

Outside IR35 | 9-12 months | Hybrid London workshops | June start We are supporting a specialist consultancy delivering a high-profile banking remediation and data transformation programme and are looking for a Technical Delivery Lead to join the team. This is not a traditional Project Manager, PMO or business-facing Product Owner role. We need someone who can operate close to engineering and data teams, get into the detail, challenge technical thinking and help unblock complex delivery issues across banking remediation, data platforms and regulatory change. The successful candidate will need recent banking experience and be able to communicate clearly and concisely with senior stakeholders while still being comfortable in detailed delivery conversations with engineers, architects and technical teams. Key experience required: * Recent banking experience * Technical delivery leadership across data/platform transformation * Remediation, customer redress, regulatory change or...

Outside IR35 | 9-12 months | Hybrid London workshops | June start We are supporting a specialist consultancy delivering a high-profile banking remediation and data transformation programme and are looking for a Technical Delivery Lead to join the team. This is not a traditional Project Manager, PMO or business-facing Product Owner role. We need someone who can operate close to engineering and data teams, get into the detail, challenge technical thinking and help unblock complex delivery issues across banking remediation, data platforms and regulatory change. The successful candidate will need recent banking experience and be able to communicate clearly and concisely with senior stakeholders while still being comfortable in detailed delivery conversations with engineers, architects and technical teams. Key experience required: * Recent banking experience * Technical delivery leadership across data/platform transformation * Remediation, customer redress, regulatory change or...

Data Engineer - Outside IR35 - Contract - SC ESSENTIAL A rare opportunity to join our fast-growing technology company selling high-value software development services. You will be working within a Government department as part of an existing team to support the rollout of a new Database. Must have Several years' experience with data modelling, data mapping, and defining data standards Experience working with complex, multi-organisation data landscapes Track record of delivering clarity in the presence of ambiguity Experience working with senior stakeholders to define strategy Nice to have Experience working with central and/or local government Familiarity with housing / property / regulatory datasets Experience implementing data standards that have already been defined Your approach You are passionate about delivering great technical quality, whether building greenfield solutions or improving the quality of legacy systems You hold...

Data Engineer (Platform & Integration), London/Hybrid, £500-£550/day (Outside IR35) Role Purpose A hands-on engineer to build out the data lake that will become the single source of truth for the business — so that iPaaS pulls from one governed, canonically-modelled platform rather than integrating directly with five separate systems. Working to the architecture and standards set by the Data Lead, this role delivers the pipelines, models and integrations that make the lake real. Day to day on Microsoft (Azure / Fabric) today, with a likely move to Google Cloud, so portable, vendor-neutral build habits matter. What You'll Do • Build the lake: Develop ingestion pipelines and the landing → curated → serving layers, following the platform design and patterns set by the Data Lead. • Implement the canonical model: Map and transform data from the five source systems into the shared canonical model, so downstream consumers work from one consistent vocabulary. •...

Senior Python Backend Engineer - Real-Time Distributed Systems £550/day Outside IR35 Watford/Hybrid (Initial onsite, then mainly remote) 6-month contract We're working with a highly engineering-led technology business building large-scale Real Time Back End systems within a distributed Azure environment. This is not a role for architects, managers, or high-level solution designers. We are specifically looking for deeply hands-on Python Back End engineers who are comfortable operating at implementation level within complex distributed systems. The environment is heavily focused on: Real-time event-driven processing High-throughput Back End services Distributed microservice architectures Low-latency data ingestion pipelines Operational resilience and observability Production-scale concurrency and asynchronous processing You'll be joining a team working on systems that continuously ingest and process large volumes of operational and telemetry-style data from...

We're recruiting a Senior Azure DevOps Engineer to join a growing technology organisation operating at scale in mission-critical, cloud-first environments. You'll play a key role in designing, automating, and improving Azure-based infrastructure and CI/CD pipelines, enabling engineering teams to deliver reliable, secure, high-performance services. This is a hands-on senior role focused on automation, cloud optimisation, and proactive operational excellence-not fire-fighting. What you'll do: Design and run Azure cloud infrastructure at scale Build and standardise CI/CD pipelines and IaC using Bicep Support containerised platforms (Docker, Kubernetes/AKS) Improve monitoring, security, reliability, and cost efficiency Partner closely with software engineering and QA teams What we're looking for: Strong Azure DevOps/cloud engineering experience CI/CD, IaC, and containerisation expertise Passion for automation, reliability, and best practice In terms...

Scrumconnect Consulting is a leading digital transformation consultancy delivering innovative solutions across the UK public sector. We specialise in Agile delivery, digital services, cloud transformation, data, and user-centred design, helping organisations build scalable and impactful digital products and platforms. We are currently seeking an experienced Senior Data Engineer / Architect to support the design of the WebCAF database, risk reporting tools, and integration services within a major digital transformation programme.   Job Summary We are looking for an experienced Senior Technical Architect with strong expertise in GDS (Global Distribution Systems) and enterprise application architecture. The ideal candidate will be responsible for designing scalable technology solutions, leading architecture discussions, and driving digital transformation initiatives within the travel domain. The candidate should possess deep knowledge of travel technologies,...