62 system engineer jobs found in London

About the Opportunity Are you a Google Cloud expert with a passion for engineering secure, mission-critical systems? We’re looking for a Google Cloud Architect to join a specialist systems integrator delivering services into UK Government. You’ll be part of a multi-year transformation programme, shaping and implementing some of the most strategically significant government systems in operation today. This is more than a technical role — it’s a chance to architect and deliver next-generation cloud platforms that protect, enable, and evolve critical national capabilities. You’ll be surrounded by some of the best engineers in the business, in an environment where innovation and security go hand in hand. What You’ll Be Doing Designing and delivering secure, scalable, and resilient architectures in Google Cloud Platform (GCP) and Google Distributed Cloud (GDC) environments. Working within disconnected environments on...

AI/LLM Engineer (Contract) - RAG Implementation | London (Mostly Remote) - Outside IR35 - Start Next Week We're seeking a skilled AI/LLM Engineer to help deliver Retrieval Augmented Generation (RAG) solutions for a major client project in London. This is a hands-on contract role suited to someone with strong implementation skills who can build reliable, production-ready AI systems on AWS. 9 months Market rate Next week start The Role You'll play a key role in designing, building, and deploying advanced AI capabilities, working closely with technical and product teams. This position focuses on execution and delivery - developing scalable, secure solutions while contributing to best practices across the AI stack. What You'll Do Design, build, and deploy RAG-based AI solutions Develop agentic workflows and intelligent automation capabilities Collaborate with architects to ensure sound AI design and integration Build and maintain scalable ML...

Technical BA - Outside IR35 I'm currently looking for a Technical BA to join a Transformation team on a six-month contract. You will be a part of a project team, working alongside a PM and Solution Architect. You will play a key role in laying the groundwork for future initiatives and assessing their current technical landscape. This role will involve working across Legacy software, hardware, databases, and Servers to understand how systems interact. You will identify risks and support the planning of effective upgrades across the organisation. Job Overview/Profile Lead on Technical Analysis and System Mapping Collaboration with Technical Teams and Stakeholder Engagement Develop clear and structured documentation Contribute to project planning You will need to have proven experience working as a Technical BA within a Transformation Programme Experience in Healthcare - Public or Private Healthcare Strong experience working with Legacy systems - ability to reverse...

Full-Stack Java Software Engineer: Contract Opportunity in Financial Services Location: Central London (Hybrid, 2 days onsite) Engagement Model: Outside IR35 Contract Duration: 6 months (Extendable) Target Rate: £450/day Target Start: ASAP Our client, a leading entity within the Financial Services sector , is seeking a high-calibre Full-Stack Java Software Engineer for a critical initiative focused on enhancing the customer experience journey within a modern, cloud-native architecture. This role sits within a high-impact workstream, with a primary focus on robust Back End development and API integration . Core Mandate and Technical Stack The successful candidate will assume a pivotal role in engineering resilient and scalable microservices. While the role is full-stack, a significant focus is placed on the Back End domain, ensuring seamless data flow and integration across distributed systems. Technical Domain Core Competencies Required Backend & Services Java...

Java Engineer (Sterling OMS / SIP) – 6-Month Contract – up to £650/day (Outside IR35) We’re seeking an experienced Java Engineer with strong expertise in IBM Sterling Order Management System (OMS) and Sterling Intelligent Promising (SIP) to join an AI-enabled consultancy delivering intelligent fulfilment and optimisation solutions. This role blends backend development and product extension work — enabling smarter fulfilment, sourcing optimisation, and seamless integration across order channels. Contract: 6 months (Outside IR35) Location: Hybrid – London Paddington, 2–3 days per week Rate: Up to £650 per day What You’ll Do Design, develop, and maintain custom Java components that extend IBM Sterling OMS and SIP functionality. Implement and customise workflows, sourcing rules, and fulfilment logic determining how and where orders are fulfilled. Integrate OMS and SIP with external systems and data sources using APIs, queues, and event-driven...

Lead RF Engineer London hybrid work - 6 months with likely extension - £600-£800pd Outside of IR35 Join a technical consultancy where your expertise in RF design directly shapes complex, high-performance systems for the world's most demanding environments. This role sits at the intersection of innovation and application. You'll act as the subject matter expert for all things RF and microwave, guiding design decisions, mentoring teams, and engaging directly with clients to translate advanced technical capability into practical, reliable solutions. Key Responsibilities . Lead RF and microwave system design, simulation, and development across multiple concurrent projects . Define architectures and design RF circuits covering frequencies from MHz through to multi-GHz ranges . Oversee design and analysis of LNAs, PAs, filters, oscillators, mixers, and antenna subsystems . Perform link budget analysis, impedance matching, and noise figure optimisation . Conduct EM and...

Technical Lead, Hands on Privacy Engineer to act as the key link between privacy regulation, engineering delivery and architectural governance. In this role you'll ensure privacy-by-design principles are Embedded end-to-end throughout the software development life cycle, helping translate regulatory intent into practical technical delivery. This role blends technical depth, privacy expertise and agile delivery experience. You will turn high-level privacy requirements into actionable technical controls, user stories and automated checks shaping how privacy is engineered into digital platforms, products and services. Key Responsibilities Privacy-by-Design in Agile Delivery Embed privacy requirements into Agile Release Trains and delivery squads from concept to release. Apply Non-Functional Requirements across epics, features and acceptance criteria. Support PI planning by identifying and escalating privacy risks early. Validate delivery outputs post-deployment to...

Job Description Contract Opportunity: Backend Software Engineer (Node.js) I’m working with an award-winning ticketing and booking platform used by major brands across the travel and attractions industry. We’re looking for an experienced Backend Software Engineer to join on a 6-8 week contract. You’ll play a key role in modernising the backend architecture of a high-traffic booking system used by thousands of customers every day. Tech: Node.js (core backend development) Location: Fully remote (UK-based) Duration: 2 months Rate: £400 per day (Outside IR35) ️ Project: Backend optimisation for a large-scale booking platform You’ll be joining a small, agile team working at pace on a system that powers real-world experiences for customers around the world. Ideal for an engineer who’s confident working independently and enjoys tackling complex backend challenges. If you’re a hands-on Node.js...

🚀 Senior Front-End Engineer – Investment Banking |£750 p/d (Outside IR35) | London / Hybrid (1 Day/Week in Office) We are partnering with a global investment bank to hire a Senior Front-End Engineer to join a flagship team delivering a next-generation, single-page application (SPA) platform for high-performance derivatives trading. This is a high-profile role on a mission-critical, front-office system with exceptional technical standards. You’ll work at the cutting edge of financial technology, contributing to a modern, reactive web platform used across trading desks. This is not your typical enterprise UI, it’s fast, data-intensive, and built to scale with real-time demands in a trading environment. 💼 The Opportunity Collaborate with elite engineers on a SPA used across the investment bank for derivatives trading. Build elegant, high-performance UIs with real-time data updates and functional programming paradigms. Shape a front-end architecture trusted...

About the job Java Engineer (Sterling OMS / SIP) Location:  Hybrid – London (2–3 days per week in Paddington) Contract:  6 months (Outside IR35) Rate:  Up to £650 per day Overview A leading technology consultancy is seeking a Java Engineer with strong experience in IBM Sterling Order Management System (OMS) and Sterling Intelligent Promising (SIP). The role involves developing and extending fulfilment and optimisation solutions that drive intelligent sourcing and seamless integration across multiple order channels. This position combines backend development, system integration, and product customisation, offering the opportunity to work on cutting-edge fulfilment and optimisation technologies. Key Responsibilities Design, develop, and maintain custom Java components extending IBM Sterling OMS and SIP functionality. Implement and customise workflows, sourcing rules, and fulfilment logic to optimise order fulfilment. Integrate OMS and SIP with...

We are seeking an experienced and highly motivated High-Performance Computing (HPC) Engineer to join our team. The successful candidate will have a proven record of delivering robust HPC services and infrastructure, combined with the ability to work closely with the scientific and research community to optimise computational workflows. The role requires an individual with strong technical expertise, an understanding of the evolving HPC landscape, and a commitment to delivering high-quality, scalable, and automated solutions. You will play a key role in building and maintaining advanced computing platforms, including containerised environments and cloud-based research computing services, while applying DevOps principles and Infrastructure-as-Code methodologies. Role details 6 months contract + possible extension Hybrid working - 3days on site 2 days remote Competitive daily rate - Outside IR35 Start date 24th November Key Responsibilities...

Java Engineer (Sterling OMS / SIP) – 6-Month Contract – up to £650/day (Outside IR35) We’re seeking an  experienced Java Engineer  with strong expertise in  IBM Sterling Order Management System (OMS)  and  Sterling Intelligent Promising (SIP)  to join an AI-enabled consultancy delivering intelligent fulfilment and optimisation solutions. This role blends  backend development  and  product extension  work — enabling smarter fulfilment, sourcing optimisation, and seamless integration across order channels. Contract:  6 months (Outside IR35) Location:  Hybrid – Paddington, 2–3 days per week Rate:  Up to £650 per day What You’ll Do Design, develop, and maintain  custom Java components  that extend IBM Sterling OMS and SIP functionality. Implement and customise  workflows, sourcing rules, and fulfilment logic  determining how and where orders are fulfilled. Integrate OMS and SIP with  external systems and data sources  using APIs, queues, and event-driven...

Test Engineer - Outside IR35 - DV Cleared Overview My client is seeking an experienced IT professional to manage technical documentation and facilitate smooth handovers to operational teams. This role is critical in ensuring that system deployments, testing, and integration are well-documented and transitioned seamlessly to support teams. Contract Details: Duration: 6 - 12 months (Long term program) Day Rate: Competitive - Outside IR35 Location: Farnborough/Bristol Start Date: ASAP Responsibilities Technical Documentation: Create detailed records of system design, deployment, testing, and integration using the client's standard templates. Handover Preparation: Develop clear, structured handover documentation, including test results, outcomes, and operational procedures. Collaboration: Work closely with technical teams to ensure all relevant information is captured and accurately documented. Process Compliance: Ensure all documentation follows client...

Test Engineer - Outside IR35 - DV Cleared Overview My client is seeking an experienced IT professional to manage technical documentation and facilitate smooth handovers to operational teams. This role is critical in ensuring that system deployments, testing, and integration are well-documented and transitioned seamlessly to support teams. Contract Details: Duration: 6 - 12 months (Long term program) Day Rate: Competitive - Outside IR35 Location: Farnborough/Bristol Start Date: ASAP Responsibilities Technical Documentation: Create detailed records of system design, deployment, testing, and integration using the client's standard templates. Handover Preparation: Develop clear, structured handover documentation, including test results, outcomes, and operational procedures. Collaboration: Work closely with technical teams to ensure all relevant information is captured and accurately documented. Process Compliance: Ensure all documentation follows client...

Keystream are recruting for a public sector organisation based in Essex who are seeking to engage with an experienced Infrastructure/Server Engineer on a six-month contract to support the delivery and maintenance of core IT infrastructure. This role offers the opportunity to contribute to essential public services within a collaborative and technically proficient environment. Position: Infrastructure/Server Engineer (Contract) Location: Essex (Onsite, so must be based in or around Essex)  Contract Duration: 6 Months Sector: Public Sector Rate:  £350-400 p/day (DOE)  IR35: Outside  Key Responsibilities Administer and maintain Windows Server environments (2016/2019/2022) Manage Active Directory, Group Policy, DNS, and DHCP services Support virtualisation platforms including VMware and Hyper-V Perform routine server patching, upgrades, and performance optimisation Collaborate with network and security teams to uphold system integrity Maintain accurate...

Keystream are recruting for a public sector organisation based in Essex who are seeking to engage with an experienced Infrastructure/Server Engineer on a six-month contract to support the delivery and maintenance of core IT infrastructure. This role offers the opportunity to contribute to essential public services within a collaborative and technically proficient environment. Position: Infrastructure/Server Engineer (Contract) Location: Essex (Onsite, so must be based in or around Essex)  Contract Duration: 6 Months Sector: Public Sector Rate:  £350-400 p/day (DOE)  IR35: Outside  Key Responsibilities Administer and maintain Windows Server environments (2016/2019/2022) Manage Active Directory, Group Policy, DNS, and DHCP services Support virtualisation platforms including VMware and Hyper-V Perform routine server patching, upgrades, and performance optimisation Collaborate with network and security teams to uphold system integrity Maintain accurate...

🚀 Outside IR35 Contract – RF Engineer (mmWave / Ku & Ka Band) – 12 Months - Hybrid Working We’re on the hunt for a Senior-level RF Engineer to take the lead on cutting-edge mmWave RF circuit design for mission-critical SATCOM systems. If you're an expert in RF engineering – particularly across the 10–30GHz range – and thrive in a fast-paced, hands-on environment, this opportunity is built for you. The key to this position is having both the system level design experience, transceiver/transmitter design and hands on RF design and test of the system. This is a 12-month Hybrid Outside IR35 contract with a leading technology client based just south of Henley-on-Thames. You’ll be joining a highly skilled engineering team working at the forefront of satellite communication, delivering RF subsystems with global reach and real-world impact. 🔧 What You’ll Be Doing: RF Subsystem Design – Architect and design Ku/Ka-band front-end modules (LNAs, PAs, filters,...

UML Modeller - (DV Cleared) Zero Trust Architecture Programme Location: Basingstoke or Corsham (onsite requirement) Duration: 12 months (with potential extension) Rate: Outside IR35 - £650 per day Clearance: UKSV Developed Vetting (DV) – current and active Start Date: ASAP Overview We are looking for an experienced UML Modeller to join a major Zero Trust Architecture (ZTA) transformation programme within a secure UK Government / Defence environment. This is a mission-critical, long-term contract suited to a highly capable modeller who can translate complex systems into structured, traceable designs — ensuring alignment with Zero Trust and Security-by-Design principles. You’ll work alongside Enterprise and Security Architects to model, document, and integrate next-generation secure infrastructure components within a tightly governed engineering environment. Key Responsibilities Develop and maintain UML and SysML models supporting...

Staff Software Engineer (Golang) Hybrid | London | 3 days in office. £750 p/d outside IR35 6 month contract The Role Oliver Bernard have partnered with a HealthTech company, using automation to accelerate the future of life science. Using robotics and data they are hoping to make enable more efficient diagnostics, discovery and treatment. What you'll do Building systems that work in cloud, bare-metal, and edge environments. Automative engineering workflow through the use of Gen-AI. Collaborate as part of a small ream closely with Platform Engineers, Data Engineers, Product Managers and Designers. About You 10+ years of software engineering experience, with some in work in a start-up, scale-up or similar high-paced environments. Proven success at building from 0 to 1 and scaling high-volume systems. Expertise in real-time/streaming systems with high throughput demands. Experience with Go, Python, Docker, Kubernetes, microservices. If you are...

Senior Node Engineer (Node, Typescript, Google Cloud), London/Hybrid, 6 months, £550/day (Outside IR35) A good client of mine, a leading hospitality company are looking to hire a Senior Node Engineer on a 6 month initial contract. The successful candidate will have extensive experience working with Node, Typescript, Terraform and GCP. Skills required: Extensive Backend Experience : Proficient in developing backend applications using multiple languages such as Node.js / Typescript. Ability to produce clean, efficient, and maintainable code. Cloud and Serverless Architecture : Strong understanding of serverless architecture, preferably on Google Cloud Platform (GCP). Experience with Cloud Run, Cloud Functions, and other cloud services is advantageous. Microservices and Distributed Systems : Deep understanding of microservices architecture and distributed systems, including knowledge of Back-end For Front-end (BFF) architecture (a plus). API Design and Development...