726 to 750 of 853 Software Engineering Jobs in the City of London

Forward Deployed Software Engineer | AI & Robotics | London A high-growth AI startup building the software that powers the next generation of autonomous systems and robotics for defence and critical operations are looking for a Forward Deployed Software Engineer to join their team. What You'll Be Doing You'll deploy and integrate advanced AI software directly … fast-moving, on-site technical environments What's In It For You Up to £120k + equity 7% employer pension Free meals, private health & dental High autonomy in an engineering-led culture World-class team (ex-Palantir, Microsoft, defence tech) Work on deployed technology shaping the future of autonomy On-site in London with travel opportunities Apply now for More ❯

C++ Software Engineer London | Hybrid (2-3 days per week) | Competitive salary + bonus Ncounter is partnering with a leading trading technology group to hire an exceptional C++ Software Engineer to build and evolve high-performance order gateway systems used in fast-moving fixed income markets. This is a hands-on role developing ultra-low-latency services that … team of developers, quants and platform engineers, working across a high-availability C++ codebase to deliver fast, resilient and observable services. Youll be empowered to design, implement and test software that directly impacts trading performance, scalability and reliability. Key Responsibilities: Design and develop high-throughput order gateway components in modern C++ Implement robust connectivity, order validation and routing logic More ❯

Senior Full Stack Software Engineer (React Native/AWS) 💰 £80,000 – £95,000 + Bonus & Benefits 📍 Hybrid – London We’re partnered with a high-growth health and fitness technology company on a mission to help people train smarter through personalised performance platforms. Following an internal promotion within the engineering team, they’re now looking for a Senior Full … Stack Software Engineer to join a small, agile squad building next-generation digital coaching tools. The Role You’ll be working in a cross-functional engineering team responsible for designing and scaling the core systems behind their adaptive training experience, from mobile applications to intelligent backend services. This role will see you own end-to-end feature delivery … simple, elegant solutions A collaborator who values impact, quality, and shipping great work over process-heavy environments The Process Initial video call (45 mins) with a member of the engineering team — part conversational, part short coding exercise (LeetCode-style) Take-home task (2–3 hours, realistic and reflective of day-to-day work) Final video interview with two engineers More ❯

Senior Full Stack Software Engineer (React Native/AWS) 💰 £80,000 – £95,000 + Bonus & Benefits 📍 Hybrid – London We’re partnered with a high-growth health and fitness technology company on a mission to help people train smarter through personalised performance platforms. Following an internal promotion within the engineering team, they’re now looking for a Senior Full … Stack Software Engineer to join a small, agile squad building next-generation digital coaching tools. The Role You’ll be working in a cross-functional engineering team responsible for designing and scaling the core systems behind their adaptive training experience, from mobile applications to intelligent backend services. This role will see you own end-to-end feature delivery … simple, elegant solutions A collaborator who values impact, quality, and shipping great work over process-heavy environments The Process Initial video call (45 mins) with a member of the engineering team — part conversational, part short coding exercise (LeetCode-style) Take-home task (2–3 hours, realistic and reflective of day-to-day work) Final video interview with two engineers More ❯

Job Title: Senior Software Engineer (Distributed Systems & ML Infrastructure) Client: Elite Tech Firm Salary: Up to £220k Base + Industry-Leading Bonus Location: London (Hybrid) Sells: Work on next-gen distributed systems and ML infrastructure, take ownership of multiple greenfield builds, zero bureaucracy, a genuinely collaborative culture, stunning offices, and dedicated time for personal projects every Friday! An Elite … FinTech firm is expanding its world-class engineering team and looking for exceptional Software Engineers who thrive on solving complex distributed problems at scale. You’ll be joining an elite group of engineers (alumni of NUS/McGill/MIT/Oxford) who have previously built systems at Meta, Twitter, Citadel, Ubisoft, and Jane Street ! This environment offers … unlimited tech resources , total engineering autonomy, and a culture that genuinely celebrates innovation and curiosity. Role Design and build high-performance, distributed systems for large-scale ML infrastructure Drive best practices in software architecture, testing, and scalability Lead and collaborate on multiple greenfield initiatives focused on performance, reliability, and scale Skills Open to all experience levels Proven experience More ❯

Job Title: Senior Software Engineer (Distributed Systems & ML Infrastructure) Client: Elite Tech Firm Salary: Up to £220k Base + Industry-Leading Bonus Location: London (Hybrid) Sells: Work on next-gen distributed systems and ML infrastructure, take ownership of multiple greenfield builds, zero bureaucracy, a genuinely collaborative culture, stunning offices, and dedicated time for personal projects every Friday! An Elite … FinTech firm is expanding its world-class engineering team and looking for exceptional Software Engineers who thrive on solving complex distributed problems at scale. You’ll be joining an elite group of engineers (alumni of NUS/McGill/MIT/Oxford) who have previously built systems at Meta, Twitter, Citadel, Ubisoft, and Jane Street ! This environment offers … unlimited tech resources , total engineering autonomy, and a culture that genuinely celebrates innovation and curiosity. Role Design and build high-performance, distributed systems for large-scale ML infrastructure Drive best practices in software architecture, testing, and scalability Lead and collaborate on multiple greenfield initiatives focused on performance, reliability, and scale Skills Open to all experience levels Proven experience More ❯

TypeScript, GraphQL Salary up to £95k + Benefits Are you passionate about crafting beautifully engineered, maintainable systems — and helping others do the same? We're looking for a Senior Software Engineer to join a fast-growing, product-led tech company that's redefining how engineering teams deliver value through smarter insights and modern architectures. You'll be joining … mission-critical insights for global clients. This isn't just another coding role — it's a chance to shape architecture, mentor peers, and lead by example in a modern engineering culture that embraces AI-assisted development tools like GitHub Copilot etc. 💻 What You'll Do Design and implement clean, testable, maintainable software across the stack Lead the evolution … modern DevOps Mentor teammates and foster a culture of technical excellence and growth Continuously improve delivery processes using cutting-edge AI tools 👀 About You 5–7 years in commercial software development Strong experience with React , TypeScript , and/or GraphQL (backend skills in Node.js , Python , or Go a plus) Comfortable designing and contributing to design systems and component libraries More ❯

Forward Deployed Software Engineer | Defence Tech & AI | London (Hybrid | 4x days onsite) About Want to work on software that powers the autonomous age? This defence tech team are building next-generation AI and systems software to help organisations collaborate with robots, sensors, and also autonomous systems. You’ll be joining at a pivotal stage of growth, working … and AI experts on high-stakes projects Work hands-on in the field, seeing your code in action with real users High autonomy, clear purpose 🚀 What they value: Strong engineering fundamentals and curiosity across tech stacks A bias for action and problem-solving in complex, real-world settings Collaboration and direct engagement with end users A willingness to travel More ❯

Forward Deployed Software Engineer | Defence Tech & AI | London (Hybrid | 4x days onsite) About Want to work on software that powers the autonomous age? This defence tech team are building next-generation AI and systems software to help organisations collaborate with robots, sensors, and also autonomous systems. You’ll be joining at a pivotal stage of growth, working … and AI experts on high-stakes projects Work hands-on in the field, seeing your code in action with real users High autonomy, clear purpose 🚀 What they value: Strong engineering fundamentals and curiosity across tech stacks A bias for action and problem-solving in complex, real-world settings Collaboration and direct engagement with end users A willingness to travel More ❯

Senior Software Developer (Java/Spring) | London (Hybrid) | £50K 💰 📍 Location: London (Hybrid) 🕒 Experience: 2+ years 💼 Type: Full-time | Permanent 🚀 The company are developing software solutions that address a wide range of challenges faced by the public sector. Their customers include government departments, agencies, and other public sector organisations, helping them streamline processes and achieve their goals effectively. They … are looking for a skilled Senior Software Engineer who looking is eager to learn, and are ready to contribute to our ongoing growth and success. 💻 What You’ll Do: 🔧 Develop and maintain applications using Java & Spring Boot ✅ Write and maintain unit, integration, and end-to-end tests 🔍 Participate in code reviews and uphold coding standards 🎨 Help design scalable, secure … your contributions. 🏥 Private health insurance to keep you covered. 💼 Pension scheme for a secure future. ✨ If you're passionate about writing high-quality code and want to work on software that makes a difference, this role is for you More ❯

Software Developer/Engineer (C++ Mac Extensions EDR) WFH/London to £80k Do you have experience developing and integrating Mac software? You could be progressing your career at a rapidly expanding scale-up software house that is developing a highly complex network cyber security platform; the platform monitors network protocols in real-time, parses the commands … data structures to extract key metadata which is then analysed by in-house algorithms and allows customers to detect hackers, malware, data leakage and other malicious activity. As a Software Developer you will focus on enabling the core product, written in C/C++ for Windows and Linux to run on Apple Mac software, using the latest Extensions … of the time, meeting up with colleagues in the London office once or twice a month. About you: You have strong C++ development skills You have experience of integrating software with Apple Mac Extensions and APIs You have a good knowledge of Network Security and EDR/EDTR You have VPN client or security experience You're collaborative with More ❯

Graduate Software Engineer - 60,000 Title : Graduate Software Engineer (C++) Client : High Performance Systems Location : London, Cambridge or Remote (from the UK) Package : Up to 60,000 This is a fantastic opportunity for any genuinely passionate graduates/junior engineers with a track record of extra-curricular/personal coding projects to join a high-performance team with … high-performance C++ code. Low-latency networking. Work on live projects from day one with a team to support you. You will have a dedicated mentor with expertise in software development to coach you into becoming the best engineer you can be. There is a culture of hands-off management - you will be given trust and autonomy from the More ❯

and services within the decentralised finance sector. Our mission is to foster an open, transparent financial system through their contributions to the Ethereum blockchain and beyond. They seek a Software Engineer with a strong background in STEM and a passion for software development. While experience with low latency systems, algorithmic trading, or MEV is advantageous, a strong interest More ❯

and services within the decentralised finance sector. Our mission is to foster an open, transparent financial system through their contributions to the Ethereum blockchain and beyond. They seek a Software Engineer with a strong background in STEM and a passion for software development. While experience with low latency systems, algorithmic trading, or MEV is advantageous, a strong interest More ❯

scale. Our team works with Python, React, and AWS to deliver high performing and highly collaborative tools for global organisations. We are now looking for a Senior Full Stack Software Engineer to help lead the next stage of development. This is a hands-on role in a growing startup environment. You will work closely with the founding leadership team … gain exposure across the entire business, and play a meaningful role in shaping product, architecture, and engineering culture. • Start date: ASAP • Location: Remote-first within the UK with occasional team sessions in London • Candidates must have the right to work in the UK • Compensation: Based on experience • Equity: Included through an employee share option scheme, aligned to long-term … AWS • Maintain code quality standards, reviews, and pipeline maturity • Support deployments, scaling, monitoring, and reliability • Work closely with Product and Design teams • Mentor engineers and contribute to growing the engineering function Who You Are • Experience operating at senior level within a SaaS or product-led environment • Strong knowledge of AWS services for production workloads • Professional experience building in Python More ❯

scale. Our team works with Python, React, and AWS to deliver high performing and highly collaborative tools for global organisations. We are now looking for a Senior Full Stack Software Engineer to help lead the next stage of development. This is a hands-on role in a growing startup environment. You will work closely with the founding leadership team … gain exposure across the entire business, and play a meaningful role in shaping product, architecture, and engineering culture. • Start date: ASAP • Location: Remote-first within the UK with occasional team sessions in London • Candidates must have the right to work in the UK • Compensation: Based on experience • Equity: Included through an employee share option scheme, aligned to long-term … AWS • Maintain code quality standards, reviews, and pipeline maturity • Support deployments, scaling, monitoring, and reliability • Work closely with Product and Design teams • Mentor engineers and contribute to growing the engineering function Who You Are • Experience operating at senior level within a SaaS or product-led environment • Strong knowledge of AWS services for production workloads • Professional experience building in Python More ❯

Full Stack Engineer – Fintech SaaS Scale-Up - London 1 day a week in office Salary - £85k-£95k + benefits About the Company Our client is a fast growing fintech software company building innovative tools for global investment firms. Their platform helps investors streamline operations, make data-driven decisions, and drive sustainable growth. About the Role They’re seeking a … Full Stack Software Engineer to help build and optimise features across their award-winning web platform. This is a hands on role in a dynamic, fast-paced environment, ideal for someone who enjoys solving complex problems and working collaboratively with engineering and product teams. Key Responsibilities Build scalable, high-performance features for a modern SaaS platform Optimize existing More ❯

Full Stack Engineer – Fintech SaaS Scale-Up - London 1 day a week in office Salary - £85k-£95k + benefits About the Company Our client is a fast growing fintech software company building innovative tools for global investment firms. Their platform helps investors streamline operations, make data-driven decisions, and drive sustainable growth. About the Role They’re seeking a … Full Stack Software Engineer to help build and optimise features across their award-winning web platform. This is a hands on role in a dynamic, fast-paced environment, ideal for someone who enjoys solving complex problems and working collaboratively with engineering and product teams. Key Responsibilities Build scalable, high-performance features for a modern SaaS platform Optimize existing More ❯

Founding Software Engineer - AI Start-Up (Central London | On-Site | Equity + Salary)🧑‍🚀 One of London’s most promising AI start-ups are looking for their first few Founding Engineers! Backed by top-tier investors and led by an elite founding team from Oxford, Cambridge, and Imperial , this venture is already attracting serious attention within the AI space!! Currently … in stealth mode, they’re now searching for a Founding Software Engineer to join the core team - someone ambitious, technically exceptional, and ready to help build the company from the ground up! 💡 About the Company Founded by alumni of successful AI start-ups, this is a business led by people who’ve done it before - and done it well. … the stack and have real influence over the architecture, tooling, and direction of the product. 🎯 What They’re Looking For: 4+ years of experience in high-growth environments Strong engineering fundamentals and a deep product mindset A top-tier academic background – 2.1/First from top university Experience building and scaling real-world applications from scratch Passion for AI More ❯

Founding Software Engineer - AI Start-Up (Central London | On-Site | Equity + Salary)🧑‍🚀 One of London’s most promising AI start-ups are looking for their first few Founding Engineers! Backed by top-tier investors and led by an elite founding team from Oxford, Cambridge, and Imperial , this venture is already attracting serious attention within the AI space!! Currently … in stealth mode, they’re now searching for a Founding Software Engineer to join the core team - someone ambitious, technically exceptional, and ready to help build the company from the ground up! 💡 About the Company Founded by alumni of successful AI start-ups, this is a business led by people who’ve done it before - and done it well. … the stack and have real influence over the architecture, tooling, and direction of the product. 🎯 What They’re Looking For: 4+ years of experience in high-growth environments Strong engineering fundamentals and a deep product mindset A top-tier academic background – 2.1/First from top university Experience building and scaling real-world applications from scratch Passion for AI More ❯

Developer (Python) Kings Cross, London- Onsite 2/3 days a week 6 month contract Inside of IR35 £750 - £800 per day My client is seeking a highly skilled software engineer to join its AI/ML team, contributing to the development of cutting-edge applications that accelerate drug discovery and enable personalised therapies. The ideal candidate will have … plus, a passion for improving healthcare through technology is essential. The role involves integrating AI/ML components into scalable web applications, collaborating across technical teams, and continuously improving software quality and performance. Key responsibilities Back end development for a Python web application Integration of AI/ML components with frontend, backend, data and compute infrastructure Responsible for high … quality software implementations according to best practices, including automated test suites and documentation Develop, measure, and monitor key metrics for all tools and services and consistently seek to iterate on and improve them Participate in code reviews, continuously improving personal standards as well as the wider team and product Liaise with other technical staff and data engineers in the More ❯

Developer (Python) Kings Cross, London- Onsite 2/3 days a week 6 month contract Inside of IR35 £750 - £800 per day My client is seeking a highly skilled software engineer to join its AI/ML team, contributing to the development of cutting-edge applications that accelerate drug discovery and enable personalised therapies. The ideal candidate will have … plus, a passion for improving healthcare through technology is essential. The role involves integrating AI/ML components into scalable web applications, collaborating across technical teams, and continuously improving software quality and performance. Key responsibilities Back end development for a Python web application Integration of AI/ML components with frontend, backend, data and compute infrastructure Responsible for high … quality software implementations according to best practices, including automated test suites and documentation Develop, measure, and monitor key metrics for all tools and services and consistently seek to iterate on and improve them Participate in code reviews, continuously improving personal standards as well as the wider team and product Liaise with other technical staff and data engineers in the More ❯

Founding Software Engineer – AI (Python/Typescript) £150,000 – £175,000 + meaningful equity On-site in London (£10K relocation provided) Join a deeply technical AI-native startup founded by PhDs and researchers from Cambridge, Imperial, and other top European and US institutions . This is an opportunity to work directly with a team who’ve published at leading … AI conferences, built open-source tools used across the industry, and scaled high-performance systems from first principles. Now, they’re hiring a Founding Software Engineer to help build the next generation of reasoning tools powered by large language models. The product is already live with paying customers, and the company is well-funded with serious growth ambitions. What … a world-leading university (e.g. Cambridge, Oxford, EPFL, ETH Zurich, ENS, TUM, etc.) Experience in AI-focused products, ideally within a high-growth or research-heavy environment Strong Python engineering skills; full-stack capability a bonus (Postgres, Typescript, React) A bias toward action, autonomy, and technical depth This isn’t a typical startup job. It’s a chance to More ❯

Founding Software Engineer – AI (Python/Typescript) £150,000 – £175,000 + meaningful equity On-site in London (£10K relocation provided) Join a deeply technical AI-native startup founded by PhDs and researchers from Cambridge, Imperial, and other top European and US institutions . This is an opportunity to work directly with a team who’ve published at leading … AI conferences, built open-source tools used across the industry, and scaled high-performance systems from first principles. Now, they’re hiring a Founding Software Engineer to help build the next generation of reasoning tools powered by large language models. The product is already live with paying customers, and the company is well-funded with serious growth ambitions. What … a world-leading university (e.g. Cambridge, Oxford, EPFL, ETH Zurich, ENS, TUM, etc.) Experience in AI-focused products, ideally within a high-growth or research-heavy environment Strong Python engineering skills; full-stack capability a bonus (Postgres, Typescript, React) A bias toward action, autonomy, and technical depth This isn’t a typical startup job. It’s a chance to More ❯

Applied AI Software Engineer - Python, Fast API, AWS, LLMs OB are partnered with a high-growth, B2B SaaS start-up who are looking to hire a highly skilled Applied AI Engineer to their Product Engineering team, where you'll pioneer the development of complex applications leveraging GenAI models. This role won't be a role focused on building … and training models from scratch, instead you'll leverage the latest tools in AI to build software that helps solve business problems, adds value to the product and shape the businesses AI roadmap. Applied AI Software Engineer - Python, Fast API, AWS, LLMs Key skills and experience: 5+ years of experience, ideally working in high-growth start-up or … top ranked University Base salary of £80k-£110k Exceptional equity and benefits package Hybrid working, with 2-3 days a week required in a Central London office Applied AI Software Engineer - Python, Fast API, AWS, LLMs More ❯