38 software engineer jobs found in London

?? 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...

Azure Software Engineer | 6 month contract Outside IR35 | £400-450/day | Hybird 2 days on site | Epsom (location not accessible by public transport) Our client, a global brand, are looking for an Azure Software Engineer to support an enterprise legacy modernisation programme . Delivery-focused role building and integrating cloud-native services across core business systems. What you’ll do Build and integrate services using Azure Functions, APIM, REST APIs, C#/.NET, and JavaScript Develop and support applications using Azure SQL / SQL MI Contribute to CI/CD pipelines and infrastructure using ARM templates with Azure DevOps or GitHub Support testing, releases, monitoring, and production stability Collaborate with engineers and business stakeholders, including on-site sessions where required What you need Solid commercial experience delivering solutions on Microsoft Azure Good C#/.NET and integration experience Comfortable working in hybrid...

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

Embedded Software Contractor As a Software engineer with my client will be at the forefront of innovation, helping to defend and protect the UK from the latest technological and cyber threats.You will get to explore pioneering concepts by collaborating with elite multi-disciplinary teams of highly educated and skilled scientists, engineers, and designers. You'll see ideas become a reality as you create prototypes. Requirements: - Active SC or DV clearance. - Experience using: Python, Linux, C++, GUIs, Embedded C Key details: - Onsite based in Cambridge - 4 day compressed work week is an option - Outside IR35 - Open rate - 6 month length + extension If this role is of interest then please apply or reach out to Ollie Hawkins

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...

Mindera are currently looking for a Software Deployment Engineer to deliver, configure, test, and roll out software and device solutions across multiple environments. You’ll work closely with software engineers, product teams, and platform specialists to ensure seamless deployments that support millions of customers and thousands of colleagues. This role is perfect for someone who enjoys hands-on deployment, automation, configuration, testing, and troubleshooting across a wide technology landscape. This is a hybrid position where you will be expected to be onsite in Bracknell 3 days per week. Requirements Deployment & Configuration (Primary Focus) Deploy application releases across Dev, Test, UAT, Pre-Prod, and Production environments. Configure applications, services, and devices according to environment needs. Automate deployment activities through CI/CD pipelines and scripting. Manage deployment schedules, releases, and environment readiness. Validate...

Mindera are currently looking for a Software Deployment Engineer to deliver, configure, test, and roll out software and device solutions across multiple environments. You'll work closely with software engineers, product teams, and platform specialists to ensure seamless deployments that support millions of customers and thousands of colleagues. This role is perfect for someone who enjoys hands-on deployment, automation, configuration, testing, and troubleshooting across a wide technology landscape. This is a hybrid position where you will be expected to be onsite in Bracknell 3 days per week. Requirements Deployment & Configuration (Primary Focus) Deploy application releases across Dev, Test, UAT, Pre-Prod, and Production environments Configure applications, services, and devices according to environment needs Automate deployment activities through CI/CD pipelines and scripting Manage deployment schedules, releases, and environment readiness...

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...

We are seeking a passionate Software Engineering Manager who will provide technical expertise and operate with excellence. Being creative, curious, and confident, you will be an integral part of our empowered, self-managing, multi-disciplinary engineering teams - designing, building, releasing, and maintaining products. You will play a key role in driving our ambition to create a best-in-class software engineering team, environment, and culture. This is an initial 6 month contract (outside IR35) that requires you to work on client site 3 days a week in London, Paddington. Requirements Your key accountabilities will include: Team Management: Build, mentor, and manage a high-performing software engineering team. Foster a culture of collaboration, innovation, and continuous improvement within the team. Facilitate communication and collaboration among team members. Ensure budgets, people and resource allocation, and workload, balance across projects. Agile...

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...

MRJ Recruitment is partnering with a global leader as they embark on a large scale payments trasnformation programme. Role: Technical Architect (Contract) We're looking for an experienced Technical Architect to help shape the platform from the ground up. You’ll play a pivotal role in defining architecture, guiding technical direction, and ensuring the solution meets the rigorous demands of modern payments. You’ll bring deep knowledge of the end-to-end payment lifecycle (Authorisation through to Capture and Settlement) and a strong understanding of the technical and operational realities of banking and card scheme integrations. If you thrive in greenfield technology programmes from inception phase and enjoy turning ambiguity into clarity, this could be a great fit. Key Responsibilities Define and own the target architecture across services, integrations, and operational components Lead early-stage discovery: evaluate options, identify risks, and shape...

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...