33 software engineer jobs found in London

?? Senior Software Engineer (Generative AI Platform) - 6-Month Contract - £650/day (Outside IR35) Location: Europe (Remote-first) Rate: £650/day Duration: 6 months (high likelihood of extension) A cutting-edge engineering team is building a next-generation GenAI platform that empowers autonomous software-engineering agents and fully agentic workflows - and they 're looking for exceptional engineers to join them. If you want to work at the forefront of AI , in a space evolving daily, and help define how engineering teams across the world write and ship code in the future ... this is the contract for you. ?? What You 'll Be Working On Designing and developing Go (Golang) services powering a scalable GenAI engineering platform. Building autonomous AI software-engineering agents capable of coding, reasoning, and executing tasks end-to-end. Developing agentic workflows that enable multi-step planning,...

?? Senior Software Engineer (Generative AI Platform) - 6-Month Contract - £650/day (Outside IR35) Location: UK or Europe (Europe preferred - remote-friendly) Rate: £650/day Duration: 6 months (strong extension potential) A high-performance engineering group is building a next-generation Generative AI platform designed to enable autonomous software-engineering agents and fully agentic workflows . This is a rare opportunity to operate at the frontier of AI-for-coding , working with emerging tools and shaping what engineering will look like in the next decade. If you 're excited by LLM-powered development, agentic reasoning, and building new systems in Go - this is your contract. ?? What You 'll Be Working On Engineering Go (Golang) services forming the core of a large-scale GenAI developer platform. Building autonomous AI agents that write, review, debug, and execute code in real time. Developing...

CONTRACT SENIOR SOFTWARE ENGINEER - eDV CLEARED NEW CONTRACT JOB OPPORTUNITY AVAILABLE WITHIN A LEADING NATIONAL SECURITY COMPANY FOR A SENIOR SOFTWARE ENGINEER WITH eDV CLEARANCE Contract job opportunity for a Senior Software Engineer Globally leading defence / cyber security company £500 - £750 per day (inside and outside IR35 roles available) London based organisation in an easily accessible location Contract Senior Software Engineer To apply please call or email WHO WE ARE? We are recruiting multiple contract Senior Software Engineers to work with various clients in London ranging from R &D companies, Multi-National Consultancies to SME 's and product based companies. Due to the nature of the work these clients do, you must hold enhanced DV Security Clearance. WHAT WILL THE SENIOR SOFTWARE ENGINEER BE DOING? As a Senior Software Engineer, you will work with an experienced agile team to design and deliver...

Senior Software Engineer (Generative AI Platform) - 6-Month Contract - £650/day (Outside IR35) Location: Europe (Remote-first) Rate: £650/day Duration: 6 months (high likelihood of extension) A cutting-edge engineering team is building a next-generation GenAI platform that empowers autonomous software-engineering agents and fully agentic workflows - and they're looking for exceptional engineers to join them. If you want to work at the forefront of AI , in a space evolving daily, and help define how engineering teams across the world write and ship code in the future this is the contract for you. What You'll Be Working On Designing and developing Go (Golang) services powering a scalable GenAI engineering platform. Building autonomous AI software-engineering agents capable of coding, reasoning, and executing tasks end-to-end. Developing agentic workflows that enable multi-step planning, orchestration, evaluation, and self-improvement. Working in environments...

Location: Tring (Predominately onsite with flex where project allows) Duration: 4-6 month contract IR35: Outside IR35 Role detaills: Our client, a leading entity in the Defence & Security sector, is seeking a highly motivated Senior Software Engineer to join them on a contract basis - The role will encompass the design and development of a web-based control and monitoring dashboard application for an antenna terminal system. Key Responsibilities: Design and develop a web-based control and monitoring dashboard application for an antenna terminal system. Engage in the full design life cycle from specifications generation to thorough regression testing of pre-production units. Build and maintain React/Next.js frontend applications and NestJS backend services within a shared pnpm monorepo environment. Integrate user-facing components with backend services using various communication protocols (REST, WebSockets, SNMP, MQTT, etc.). Develop the GUI using a mix of...

PLC Software Engineer Location: Heybridge, Essex, Full time on site Duration: 18 months Rate negotiable on application Outside IR35 Job description The implementor should have a fundamental knowledge in programming with Codesys as well as in all corresponding programming languages eg Structured text click apply for full job details

PLC Software Engineer Location: Heybridge, Essex, Full time on site Duration: 18 months Rate negotiable on application Outside IR35 Job description The implementor should have a fundamental knowledge in programming with Codesys as well as in all corresponding programming languages eg Structured text click apply for full job details

I'm recruiting for a small business in Cheltenham who are looking for an Embedded Software Contractor on a 6 month contract (outside IR35).  The work is based around Zephyr RTOS on Nordic chips. Previous experience (in-depth!) is needed for this.  ** Work can be done remotely after an initial period of 3-4 days on-site. Also may require on-site visits to Cheltenham throughout depending on project progression. ** ROLE:  Embedded Software Engineer LOCATION:  Remote (Cheltenham) RATE:  up to £60ph DURATION: 6  months Skills required for the Embedded SW Engineer: C Zephyr RTOS Nordic chips Linux  If you're interested, please apply below or get in touch with any questions Cheers, Nathan

Geospatial Data Engineer - Contract  Remote UK £420 per day 12 Months - the entirety of 2026 into 2027 Deemed Outside IR35 (pending QDOS assessment)  This Contract Geospatial Data role is a fantastic opportunity to work on cutting edge data problems at a leading environmental risk consultancy. The position has arisen due to the success and growth of Bright Purple's impressive established client. They are a leading player in their field with a powerful and highly regarded platform built using the latest technologies. You will be working in a team of software and data engineers supporting data workflow & orchestration, within an AWS environment and must have experience of RASTER data sets. In this role, you will be: Developing ETL pipelines - Raster, Vector, Tabular data Configuring CI/CD pipelines Managing data storage within an AWS environment Improving data automation, workflow and efficiency Developing Python...

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...

Full Stack Developer (React / TypeScript / Java) Location: London (1–2 days onsite per month) Contract: Outside IR35 Rate: £650–£700 per day Duration: 12 Month Contract Start: Immediate / Short Notice Preferred Eligibility: Active SC Clearance required (DV clearance ideally) Overview An experienced Full Stack Developer is required to build and maintain scalable, high-performance applications within a secure public sector environment. The role requires a 50/50 split across front-end and back-end development . Requirements Strong experience with React and TypeScript Solid Java back-end development experience Experience working in a full stack capacity (approx. 50/50 front-end/back-end) Strong understanding of API integration and system design Active SC Clearance required (DV clearance ideally)

Job Summary: Front Office C# Risk & Valuations Developer (Outside IR35) Role : Senior C# Risk & Valutaions Developer Location : Remote (with occasional travel to London City) Rate : Upto £800 per day IR35 Status : Outside IR35 Duration : 12 months + Responsibilities : Develop and enhance Front Office (FO) risk and P&L functionality in a core risk system. Investigate risk and P&L issues raised by users. Collaborate with the quant group and FO users to gather requirements. Produce user and technical documentation. Ensure system stability and supportability. Essential Skills : Very strong C# development, including very strong multi-threading. Proficiency in SQL Server. Good knowledge of derivatives pricing across asset classes. Understanding of risk management and Greeks. Experience with distributed systems. Strong mathematical background. Familiarity with complex Excel pricing sheets Python and Azure is a plus. Ideal...

ComfyUI Workflow Developer | London | Remote-Friendly | £500 - £600 We're working with a high-end creative agency specializing in hyper-realistic CGI for global luxury brands on this exciting opportunity. We are looking for a technical visionary to bridge the gap between AI experimentation and high-end production pipelines . This role is about more than just generating pretty images; it’s about engineering robust, scalable AI architectures using ComfyUI, Python, and Stable Diffusion to meet the exacting standards of the luxury market. You will move from a high-impact POC sprint into a full-scale production deployment, automating asset generation that rivals traditional CG I. The R ole• Architect and build advanced ComfyUI workflows capable of generating high-resolution, brand-compliant assets at sca le.• Develop custom Python scripts and API integrations to connect AI pipelines with existing Digital Asset Management (DAM) syste ms.• Transition from a 4-week...

Senior C# Developer - Commodities Trading - Outside IR35 Exciting opportunity for an experienced senior developer to build on their experience in Commodities or similar trading development role in this successful Commodities Trading company. £750 - 800 per day Outside IR35 The Senior C# Developer will have significant prior experience as a Senior Software Engineer/Senior Developer working as C# Developer in a Commodities trading environment where they will have gained knowledge of the full trade life cycle and feel comfortable speaking directly to traders and senior stakeholders in the business as well as senior technical colleagues such as architects. Central London location, with Hybrid working expected. Very strong core skills in C# are expected Good knowledge of Commodities Trading is also required. Please apply now if your curious to learn more, for a confidential discussion about the role and company Guidant, Carbon60, Lorien & SRG - The Impellam Group...

C++ Software Engineer (Contract) – £300–£400/day – Outside IR35 You'll be working for a Fintech company as an experienced C++ Software Engineer. Joining the development team on a 9‑month contract (OUTSIDE IR35) . This role focuses entirely on modern C++ engineering within a high‑performance Linux environment. You’ll work across core C++ components, toolsets, and performance‑critical systems, collaborating with senior engineers to enhance and maintain a sophisticated technical product suite. The work is varied, technical, and ideal for someone who enjoys solving low‑level and high‑performance coding challenges. This position does not require prior experience in financial services or trading systems, but if you have it, then great. If not, we are happy for you to learn this on the job. Role Responsibilities Develop modern, production‑grade C++ features and components Work with multi‑threaded, high‑performance systems Contribute to design discussions, code...

C++ Software Engineer – Low‑Latency Trading Contract - OUTSIDE IR35 Rate - Dependent on skills London - Hybrid working 50% in office. You'll be joining a high‑performance trading technology firm. Helping to building ultra‑low‑latency systems powering global electronic markets. Working alongside world‑class engineers solving complex challenges across C++, Linux, networking, and hardware‑accelerated trading pipelines. What You'll Do Build and optimise high‑performance, low‑latency C++ applications Develop real‑time systems interacting directly with global exchanges Work closely with FPGA, network, and infrastructure teams Improve latency, throughput, and reliability across mission‑critical systems Contribute to performance tuning, profiling, and code reviews Skills required Exceptional modern C++ (C++17/20) development experience Strong Linux systems knowledge and debugging skills Experience in low‑latency, multithreaded or high‑performance environments...

DV Cleared Senior Software Engineer Aldermaston - Onsite 12-month contract Outside IR35 Are you a DV cleared Software Engineer who can take full ownership of software delivery on site? Do you enjoy building Siemens PLC solutions from scratch in secure, regulated environments? Looking for a long-term contract with a strong on-site engineering focus? What's in it for you £650 to £750 per day Outside IR35 1 click apply for full job details

Contract Engineering Team Lead – London (Hybrid) - £550/day OUTSIDE IR35 We’re currently partnering with a fast-growing fintech organisation that is transforming the payments landscape across the UK and Europe. They are looking for an experienced Engineering Team Lead to join their team on a contract basis, leading a high-performing engineering squad delivering customer-facing financial technology products. This is an excellent opportunity for a hands-on engineering leader who enjoys combining technical delivery with team leadership in a modern, fast-paced product environment. The Role As Engineering Team Lead, you’ll oversee a cross-functional engineering squad responsible for building and delivering customer-facing applications within a broader embedded finance ecosystem. You’ll help guide ideas from concept through to production, ensuring high engineering standards, predictable delivery, and strong team engagement. You’ll remain technically involved when...

Senior DevOps Engineer – PropTech – AWS, Terraform, Kubernetes, Startup – £500/day (OUTSIDE IR35) A fast-growing PropTech (property tech) firm, backed by industry-leading VCs and investors, is seeking a Senior DevOps Engineer. Operating as an all-in-one platform changing the future of commercial property, this innovative company is looking for a dynamic individual to level up how they build and ship software. The Senior DevOps Engineer's role: This is a high-ownership, contract position where you will be the sole DevOps person, serving as the go-to expert for all things infrastructure. You will own the AWS environment, driving a real push toward security best practices as the company works toward ISO 27001 certification. This isn't just about maintenance; it’s about making things better—creating tighter CI/CD pipelines and cleaner infrastructure-as-code within a collaborative, hybrid environment. Senior DevOps Engineer Key Responsibilities: • Own and improve the...

Machine Learning Engineer - Python/PyTorch - £575-£675/day - Outside IR35 - Remote (UK) Contract: 6 months (extension likely) Day Rate: £575-£675 per day IR35 Status: Outside IR35 Location: Remote (UK) Core Stack: Python, PyTorch/TensorFlow, AWS, Docker, Kubernetes The Opportunity We're working with a growing technology team looking for a Machine Learning Engineer to help design, build and deploy machine learning systems used in real-world applications. This role sits at the intersection of software engineering, data science and applied machine learning, with a focus on taking models from experimentation through to scalable production ML systems. You'll work closely with engineers, data specialists and product teams to develop ML capabilities that support new and existing products. We're also happy to speak with Data Scientists who have strong Python engineering experience and have deployed machine learning models into production environments. What You'll Be...