26 to 50 of 108 Senior Software Engineer Jobs in the City of London

Senior Software Engineer, Web Experience (Contract) Contract position OUTSIDE IR35 Can offer both remote and onsite options. Nando’s has been in the UK and Ireland since 1992 and we’ve grown from a single takeaway store in Ealing, London to over 450 restaurants across all locations. … latest technology tools and practices to solve some of its most complex problems. The Customer Web Experience Team We are seeking a Contract Senior Software Engineer to join our Customer Web Experience team. Our remit is to bring the Nando’s brand to life with a brilliant ...

Senior Software Engineer – Join a scaling Series A 🚀 💰Up to £110,000 🏡Hybrid working – London based - 2 days a week onsite 💻React.js, TypeScript and Node.js We’re partnered with a tech driven Scale-Up in London who have successfully achieved Series A this year and they … responsible for the end-to-end development of new modules and features whilst working closely with their technical Co-Founders. If you’re a Senior Software Engineer looking for a new opportunity with you can work on 0-1 projects and share your knowledge and expertise ...

Senior Software Engineer (React/Node) £Up to £85k Hybrid working in London (Holborn) Would you like the opportunity to work for a growing organisation in the tech for good space, currently looking for a Senior Fullstack (React/Node) Engineer? You will be joining … dynamic product team, where you will be building great software and having a direct impact on the environment for the better. The ideal candidate has a solid grasp of software Engineering principles and can lead projects from end to end. You will get the opportunity to work across ...

Senior Java Engineer – Product Engineering | B2B SaaS | Insurtech Up to £110,000 per annum plus bonus and excellent pension London – 2 days a week Java | Spring Boot | AWS | Kubernetes | Event-Driven Architecture Senior Java Engineer – We have been exclusively engaged by a leading B2B SaaS technology … business to find a Senior Java Engineer with a “product engineering” mindset to join its growing team. Operating at the intersection of insurance and technology, the company is transforming its platforms into fully SaaS-based solutions, scaling internationally and shaping the future of Insurtech products. Backed ...

Senior Software Engineer (Java) – Portfolio Optimization | Fintech | London/Hybrid About My Client My client is a high-growth fintech company transforming the way capital markets operate. Their mission is to make global financial systems safer , more efficient , and more open , using advanced technology and deep domain … develop intelligent solutions that optimise portfolios, reduce risk, and unlock access to more diversified capital. About the Role My client is seeking a Senior Software Engineer to join their Portfolio Optimization team — a core group responsible for building the technology that drives their balance-sheet and exposure ...

Senior Software Engineer (Architecture-Focused) Hybrid — London £70,000 - £80,000 + Benefits We’re partnering with a global adtech firm. They’re now looking for a Senior Software Engineer with architectural exposure to help design and deliver key platform components while remaining hands ...

Senior Software Engineer (Full-stack) - Permanent | On-Site | London Join a rapidly scaling US-backed startup at a pivotal moment. With significant funding secured and strong momentum, they are establishing their UK presence and offering exceptional equity opportunities for early team members. As a Senior Software Engineer, you'll work across our Python and TypeScript stack, contributing wherever the team needs you most. What You'll Be Doing: Develop and maintain FastAPI (Python) and Next.js (TypeScript) applications. Own features end-to-end - from user interface through to infrastructure and internal tooling. Navigate and contribute ...

Senior Software Engineer – AI Startup – Up to 120k 🚀🧠 💰 Salary: £70,000 - £140,000 + meaningful equity 🏙️ Location : London, flexible working arrangements, ideally 2/3 days in office 💻 Tech Stack : Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our y-combinator backend client are building an elite … world problems with the latest in AI and LLMs, this role is for you. In this role, you’ll: 🔧 Build and ship high-impact software 🧠 Work on AI/LLM-powered automation tools used in production 🏗️ Help shape scalable systems and infrastructure 🌍 Work collectively across teams to push ...

Senior Software Engineer Location: London 1x a month Salary: £75,000 - £95,000 An established, global technology business within the hospitality-tech industry is seeking a talented Backend Software Engineer to help build and scale cutting-edge digital solutions. This is a chance to work … doing? Design, develop, test, and maintain high-performance backend systems supporting real-time hospitality operations. Take ownership of key features throughout the software development lifecycle - from technical design through to deployment and ongoing optimisation. Collaborate with cross-functional teams including product, design, and data science to deliver innovative, customer ...

Senior Software Engineer Location: London - Hybrid (Occasional Travel required) Salary: £75,000 - £95,000 An established, global technology business within the hospitality-tech industry is seeking a talented Backend Software Engineer to help build and scale cutting-edge digital solutions. This is a chance … doing? Design, develop, test, and maintain high-performance backend systems supporting real-time hospitality operations. Take ownership of key features throughout the software development lifecycle - from technical design through to deployment and ongoing optimisation. Collaborate with cross-functional teams including product, design, and data science to deliver innovative, customer ...

Senior Software Engineer – London (Hybrid) Join a small, elite engineering team building category-defining SaaS for one of the world’s most high-stakes industries. We’re a fast-growing London startup founded by industry veterans who saw firsthand how outdated, manual and chaotic private-market workflows … expanding our team to deliver a multi-product roadmap and ship the next wave of innovation. 🔍 Who You Are You’re a senior engineer who loves solving hard problems, working in a tight, high-performing team, and building software that actually changes how an industry works. ...

Senior Engineer | Full-time | London (On site) | SAAS Salary : £competitive + share options + 8% pension + private healthcare Location : London (hybrid) Sector : Cyber Security Skills : AWS, Serverless, Lambda, IaC, CICD, Java/Node/Python etc, AI Literacy, Front End Engineering This is a chance to join … team where engineering and product thinking go hand in hand. As a Senior Software Engineer (Full Stack) here, you won’t just be writing code - you’ll be shaping how the product works, solving complex problems, and contributing to decisions that influence millions of users. From ...

Senior Software Engineer (Python/AWS) £90 - £100k 📍 Location: London or Manchester 💼 Employment Type: Full-time, Permanent About the Role We’re looking for a Senior Software Engineer with deep experience in Python and AWS to help design, build, and scale distributed, data-driven ...

Senior Software Engineer - Python Permanent – Hybrid Working £70,000 - £80,000 base plus package We are currently recruiting a Senior Backend Engineer to join a talented engineering team, building highly scalable backend services that power exceptional customer experiences. This is a role where your technical ...

Senior C++ Software Engineer New C++ contract role working on a greenfield project for a client within the financial domain. Healthy rate for this one and 2 days a week in the office. What you will be doing: As a Senior C++ Software Engineer … features and feature enhancements Leading code reviews and enforcing best practice within a small, agile, focused team What you will need: Extensive commercial software development experience using C++ Unix/Linux experience Relevant degree in a numeric discipline, or equivalent work experience Excellent written and spoken English By applying ...

Senior Software Engineer Full Stack - Ruby on Rails, React Up to £120k DOE Fully Remote - must be UK based A fast-growing sports tech company building high-performance, data-driven products for a rapidly expanding global audience is searching for a Senior Full Stack Engineer . This is a pivotal role for an experienced engineer who thrives on shaping architecture, driving technical direction, and still remaining hands-on in the codebase. As a technical leader within a cross-functional Product Team, you’ll influence the long-term engineering strategy, guide architectural decisions ...

Senior Software Engineer - Full-Stack Location: London Working Model: Hybrid 3 Days Salary: Up to £128,000 Ready to build tech that actually means something? This team is powering the next generation of electrification EVs, solar, batteries, heat pumps, smart devices all connected through a platform thats … scaling fast and rewriting the rulebook in green-energy tech. Theyre growing. Theyre hiring. And they want a Senior Engineer who can own problems end-to-end, think like a product person, and ship like someone who knows their craft inside out. If you want a job where ...

Title: Senior Software Engineer (AI HealthTech) Client: AI HealthTech Scale-Up – Backed by Top-Tier Investors, Led by World-Class Engineers Salary: Up to £100k + Bonus + Equity Location: Remote (UK-based) with an optional office Sells: Work on cutting-edge AI systems that power healthcare … culture that rewards curiosity, autonomy, and clean engineering. An AI HealthTech company is expanding its high-calibre engineering team and looking for Software Engineers who thrive on building elegant, scalable systems from the ground up. You’ll be joining a small, world-class team working on distributed backend platforms ...

title: C# Senior Software Engineer (VP) Client: Investment Firm Experience Level: 5+ years' Salary: - Up to £130k + Bonus Location: London (Hybrid) An elite investment client are searching for Senior C# Developers to join a group of the highest-regarded talent around! Role This … development of several greenfield features and will involve the use of the latest frameworks within .Net Skills/Experience Proven experience working as a Software Engineer within the financial services domain Knowledge of C# .Net core Degree in Computer Science/Engineering is preferred! Experience with ...

Senior Software Engineer (Kotlin) 💰 £85,000 - £95,000 + bonus + excellent Benefits 📍 Hybrid - 2 days onsite in Central London (Zone 1) Are you a JVM engineer curious about Kotlin – or already loving it? Want to solve complex problems that contribute to a greener, more sustainable ...

Software Engineer London/Hybrid | Perm Role £80,000 - £100,000 Harrington Starr has partnered with a fast-growing fintech that’s transforming how businesses manage foreign exchange and treasury operations. Their technology enables clients to access institutional-grade execution, automate manual workflows, and gain greater transparency across … product offering and deliver cutting-edge solutions that help clients manage risk more effectively. The Role This is an excellent opportunity for an experienced Software Engineer — ideally with a background in financial technology or FX — to join a high-performing engineering team within a scaling fintech. ...

Senior Software Engineer – Help Build the Financial Backbone of the Non-Profit World | £85k–£95k | 5 Days Onsite (London) One of the most unique early-stage startups hiring in London right now is looking for two mission-driven Senior Engineers to help redefine what giving looks ...

Senior Software Engineer – 3D Graphics/Computer Vision London preferred | Full-time | Visa sponsorship available The mission Work at a stealthy 3D/graphics startup that turns real‐world objects into production‐ready, photoreal assets for film, games and real‐time experiences. Think: high‐end material capture … photogrammetry tools used behind the scenes by top studios, not off‐the‐shelf consumer software. The role You’ll be the go‐to engineer for 3D rendering and asset processing in a Windows desktop app that sits at the heart of the company’s pipeline. Expect deep work ...

Senior C# Engineer City of London (On-site) Permanent | £90,000 – £120,000 We’re partnered with an innovative proprietary trading firm in the City of London that is hiring a Senior C# Software Engineer . You’ll work on greenfield projects, cutting-edge technology ...

Senior Software Engineer | Climate Tech | London (Hybrid) A climate tech startup building tools that make clean energy the default choice is looking for engineers who enjoy deep technical challenges and want their work to create real-world impact. Their platform helps stabilise the grid by shifting energy ...