101 to 125 of 264 Software Engineer Jobs in London

technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Senior Embedded Software Engineer - SMES Level Job Code: 33311 Job Location: Camden, NJ- Relocation packages available for qualified candidates. Schedule: 9/80 reg with every other Friday … embark on this exhilarating journey with us, shaping the future of defense technology! Job Description: L3Harris Integrated Mission Systems is seeking a Software Engineer. Responsibilities include the translation of requirements into working and maintainable solutions for our C5 and Cyber Solution Centers. The selected candidate will apply technical proficiency ...

Embedded Software Engineer UK (Hybrid) My client is an innovative technology company developing advanced hardware and networking solutions for high-performance computing environments. Theyre looking for Software Engineers to build embedded and host software for high-speed systems, working closely with hardware teams to deliver production ...

Senior Software Engineer (.NET/C#) | Greenfield Systems Rebuild | Remote | £80,000–£100,000 This is a hands-on senior engineering role with real technical authority. You will be the lead engineer and technical decision-maker on a greenfield rebuild of a mission-critical system, working within … directly to the Head of Technology. Once the build is delivered, the role expands into enterprise architecture responsibilities. If you are a strong .NET engineer who has been moving into architecture and wants to own the outcome rather than advise on it, this is worth reading. THE ROLE Lead ...

SENIOR SOFTWARE ENGINEER £85,000 LONDON We're working with a well-established digital media and technology organisation who are growing their engineering function and hiring Senior Software Engineers to help shape the next phase of their internal platforms. This role suits engineers who enjoy thinking beyond ...

Contract Software Engineers C# & C++ (Linux) Near Wimbledon, London | 6 months | Inside IR35 Were hiring two separate contract engineers to work on hardware-integrated software projects: Contract C# Software Engineer (Windows) C#/.NET Windows desktop applications (Windows Forms) Multi-threaded & networked applications TCP/… Hardware/physical product interfacing On-site 3 days per week (initially full-time on-site) Contract C++ Linux Software Engineer (Embedded) Strong C++ on Linux Embedded software experience Networking (TCP/IP, UDP) Build systems (OpenEmbedded/BitBake desirable) Hybrid working once up to speed ...

build custom architecture at the cost and speed of mass production - unlocking even the most complex sites. We’re currently seeking a Principal Platform Software Engineer to join our team, focused on shaping the system architecture and delivering software that defines the mobility, manipulation, autonomy, and reliability … robotic systems. Responsibilities: Defining software architecture for robotic mobility, manipulation, autonomy, and platform tooling; Developing and maintaining production-grade software in Modern C++ and Python for embedded Linux environments; Designing APIs, abstractions, and reusable libraries that support reliable and scalable robotic systems; Building software for task ...

Senior Software Engineer (TypeScript/Python, FinTech, AI) London (Hybrid) £95,000 The Opportunity Join a high-growth, regulated fintech building next-generation infrastructure at the intersection of traditional finance and digital assets . The platform enables institutional clients to trade, tokenise, and manage real-world financial assets ...

Lead Software Engineer Contract to Permanent Hybrid (London) Rates negotiable Most streaming platforms struggle to scale backend systems properly you’ve seen it. This role is about building the infrastructure that actually holds up under real-world production demand. Why This Role Leading major media/streaming ...

Senior/Principal Software Engineer Application Deadline: 31 May 2026 Department: Software Engineering Employment Type: Permanent Location: London (Hybrid) Compensation: £70,000 - £100,000/year Description Please note: This role requires applicants to hold active, or recently active, SC or DV clearance. This role also requires … build modern cloud‐native services, guide engineering standards, and solve genuinely hard problems with our customers. The Role: Design and deliver secure, scalable software in small agile teams Stay hands‐on while shaping architecture and technical direction Set engineering standards and mentor others Work directly with customers to solve ...

C++ Software Engineer – High-Frequency Trading A systematic trading firm of similar calibre to leading names in the space is seeking exceptional C++ Software Engineers to join its world-class engineering team. This is a hybrid position, open to candidates based in London or has the right … code for speed and reliability under production workloads Collaborate closely with traders, researchers, and fellow engineers to develop scalable infrastructure Work across the full software lifecycle in a fast-paced, agile environment Key Requirements: Strong proficiency in modern C++ (C++17 or later) Deep understanding of systems programming, multithreading, memory ...

Senior Software Engineer Location: London (Hybrid/On-site) Salary: £100,000 – £150,000 + equity About the Company We’re working with an early-stage, venture-backed legal technology startup on a mission to transform one of the UK’s most broken consumer experiences: the legal process … foundation for navigating regulation while moving quickly in a traditionally slow industry. The Role This is an opportunity for a Staff or Senior Product Engineer to join as one of the earliest engineers in the business. You’ll be part of a small, high-calibre team of generalists ...

Agentic Software Engineer | West London | Full-time | Hybrid (4 days onsite per week) Tech: AWS, Salesforce, Snowflake, Node.js, TypeScript, Python, React, GraphQL, Claude Code, Cursor, Copilot, Codex or similar agentic tools We're hiring on behalf of a growing EdTech customer, a globally active education organisation with … stakeholders and agents; turning ideas into working product fast enough that iteration feels like a conversation What they're looking for: 5+ years of software engineering experience — but your recent work looks fundamentally different You've used Claude Code, Cursor, Codex or similar agentic tools in production, not just ...

Founding Software Engineer – London – Hybrid (1 to 2 days a week) A London AI startup building the bridge between how non-technical teams already work and the agent-powered systems that can do that work for them. The product watches how a business operates, learns its processes … automates them without an engineer in the room. Founded by two operators, who have scaled and exited businesses before. V1 is live, paying customers are in, and the £375,000 seed just closed. Burn is low, runway is healthy. The vision is a strong, profitable business, a sensible exit ...

Staff Software Engineer | Golang & TypeScript/React | London (Hybrid) Salary: £100,000 - £115,000 (+/- 10% DOE) We're working with an early-stage product company building a platform that sits at the intersection of data, automation, and decision-making. The team is tackling a complex problem … around how organisations operate and optimise processes at scale, using modern software and AI to improve speed, accuracy, and outcomes. It's a product-led environment with high ownership, where engineering plays a central role in shaping both the system and how it's used. The Opportunity Play ...

Principal Software Engineer 📍 London - Hybrid 💰 Up to £140k + bonus We're working with a profitable, engineering-led fintech that builds software used by investment firms to manage reporting, data, and client-facing outputs. Their platform underpins core workflows for their clients - handling complex, highly tailored requirements … stage of growth: evolving the existing system while building out new products alongside it. They’re looking for a Principal Engineer to take ownership of how that platform develops from here. This is a senior, hands-on position with real influence over both architecture and delivery. ...

Staff Software Engineer | Golang & TypeScript/React | London (Hybrid) | Agentic AI £120,000 + equity (flexible depending on experience) We’re working with a fast-paced, early-stage startup building an agentic AI product designed to automate complex workflows and decision-making in real-world environments. … still early, still messy in the right ways, and still a place where one strong engineer can have disproportionate impact! The product sits in the agentic AI space, building systems that don’t just assist but actively carry out tasks, make decisions, and improve over time. That means ...

Senior Software Engineer (Backend) Series A | eCommerce x Fintech | Meaningful equity Buying clothes online still isn’t a great experience. Sizing is inconsistent, returns are costly, and customers are often left guessing. Yet despite all the innovation in eCommerce, this problem remains largely unsolved. We’re working with … here is the chance to build something that matters, in a team where your contribution is visible from day one. If you’re an engineer who enjoys building real products, solving meaningful problems, and working in an environment where ownership and impact matter more than process, this is worth ...

Senior Software Engineer/Data Platform Engineer London Area, United Kingdom (Hybrid – 3 days onsite) Contract Type: 6 month Inside IR35 £700–£750 per day The Role You will support the evolution of a large-scale financial data platform, modernising legacy enterprise systems while building scalable cloud … Proven experience in enterprise or legacy systems – critical Strong analytical and problem-solving abilities We'd expect you to have around 10 years of software and data engineering skills. Nice-to-Haves Financial services or market data background Experience modernising legacy platforms API design and ETL/data pipeline ...

Level: 9 UK Wide We are looking for a Senior Software Engineer who will be responsible for designing, developing, and deploying high-quality software solutions. You will work on complex software projects, contributing to the architecture, development, and improvement of software systems click apply ...

excellent opportunity to join one of the UK's leading software consultancie s , renowned for its strong presence in the public sector while also delivering private and SC-cleared projects. As a Senior Software Engineer, you will look to design, build, and deliver high-quality software … architecture, mentor junior engineers, and collaborate with cross-functional teams across public and private sector programmes. Key responsibilities include: * Designing and developing scalable, secure software solutions * Contributing to architectural decisions and technical direction * Mentoring junior engineers and promoting best practices * Working closely with Product, UX, DevOps, and QA teams ...

partnering with an ambitious industrial technology startup who is developing a network of distributed, software-defined factories designed to help hardware companies iterate faster and scale production efficiently. They are now hiring a Full Stack Software Engineer to help build and scale their proprietary factory operating system. … backend services, frontend interfaces, and monitoring tools. Work closely with leadership and factory-floor teams to identify operational bottlenecks and translate them into impactful software solutions. Deploy and iterate on software rapidly, working closely with manufacturing operations to directly control and optimize production. . Key Qualifications ...

powerful, entertaining, and inspiring stories for people all around the world. PURPOSE OF THE ROLE Join the BBC Media Services team to build the software powering audio and video experiences for millions worldwide. As a Software Engineer, you'll design, develop, test, and maintain high‐quality systems … your engineering skills while shaping consistent and engaging media experiences at scale. YOUR KEY RESPONSIBILITIES AND IMPACT: Design, develop, test, and deploy high‐quality software applications and services. Collaborate with product managers, business analysts, and engineers to deliver features end‐to‐end. Write clean, well‐documented, maintainable code following ...

powerful, entertaining, and inspiring stories for people all around the world. PURPOSE OF THE ROLE Join the BBC Media Services team to build the software powering audio and video experiences for millions worldwide. As a Software Engineer, you'll design, develop, test, and maintain high‐quality systems … your engineering skills while shaping consistent and engaging media experiences at scale. YOUR KEY RESPONSIBILITIES AND IMPACT: Design, develop, test, and deploy high‐quality software applications and services. Collaborate with product managers, business analysts, and engineers to deliver features end‐to‐end. Write clean, well‐documented, maintainable code following ...

Barrington James’s specialist Software & Electronics Division is currently searching for a Software Engineer on a full time permanent basis in West London, England. (This opportunity is hybrid with 3 days a week on site required) To be considered for this position: Essential : Hardware Integration, Python (NumPy … SciPy, Pandas, Matplotlib, Sklearn, PyTorch), Desirable : GUI (Tkinter, PySide), C++, Life Science experience (Optics, Lenses etc.) Responsibilities/Requirements • Develop and maintain Python-based software for scientific data processing, modelling, and analysis. • Design and build user-friendly interfaces and tools to support research and operational workflows. • Integrate software ...

Senior Software Engineer C++ (Python, SQL, Linux, Trading, FinTech, Financial Technology, Low Latency, Backend) This is a hybrid role, 2 days remote and 3 days in the office Our client actively encourages diversity, equality and inclusion within its workforce and welcomes applications from a diverse background, REC Solutions ...