326 to 350 of 568 Software Engineering Jobs in the City of London

Principal Software Engineer – Cards & Credit (Python, Java, Clojure, AWS) 💰 Up to £135,000 + bonus (15-22%) + annual equity 🖥️ Python, Distributed Systems, High-Scale Architecture 📍 London, hybrid working (2 days/week) 🤝 Leading business lending platform I'm partnered with one of the UK’s most successful fintech scale-ups who have built a platform helping businesses access … become the company’s highest-growth area, with its own dedicated leadership and roadmap. They’re now hiring a Principal Engineer to become the technical lead across two core engineering teams working in the card and credit space. This is a critical hands-on IC role driving architecture, mentoring senior engineers, and setting the engineering direction for one … authority across two product teams focused on credit and card systems Lead architectural decisions for a high-volume, low-latency backend platform Work closely with senior product, platform and engineering stakeholders to define technical direction Mentor Lead and Senior Engineers, driving engineering excellence and fostering a high-performance culture Play a key role in the migration from legacy More ❯

About the Job Software Engineer – Integration Team Location: London – Hybrid model Overview We’re representing an industry-leading client in the advanced media technology space, currently hiring for their Integration Team. This is a hands-on software engineering role focused on bringing next-generation video and content delivery systems to life across a wide range of platforms … including mobile, web, and immersive environments. You'll work at the intersection of product, performance, and platform engineering, with exposure to global media customers and highly scalable products. Key Responsibilities Integrate next-gen encoding/decoding pipelines into platforms such as: Android (e.g. media frameworks, playback tools) iOS (e.g. AV frameworks, streaming APIs) FFmpeg-based pipelines Web-based decoders … Submit upstream improvements Assist external partners integrating similar technologies Participate in Agile development processes: Sprint planning, team stand-ups, and technical reviews Required Skills & Experience Degree in Computer Science, Engineering, or related field (or equivalent practical experience) Solid knowledge of C/C++ programming and systems-level development Familiarity with Android or iOS application frameworks Interest in multimedia, streaming More ❯

About the Role We are looking for a Senior Software Engineer to help transform our advanced robotics stack into a dependable product ready for the real world. This is a deeply technical and hands on role. You will write production code, integrate subsystems, and work directly with robots in both simulation and real hardware environments. You will be part … of a focused team responsible for the application level software that connects control, navigation, perception, learning, and platform systems. Your work will ensure that these components operate as a coherent and reliable system that users can interact with seamlessly. This role involves close collaboration with engineers across multiple domains. You will contribute to architectural decisions, build prototypes, and iterate … It is well suited to someone who enjoys working close to hardware and solving practical, cross disciplinary challenges. What You Will Do You will develop and maintain application level software for humanoid robots You will integrate software components from controls, navigation, computer vision, reinforcement learning, and platform teams You will contribute to the structure and evolution of the More ❯

Senior Software Engineer – Functional Programming Focus – Up to £140,000 + Equity + Bonus The Opportunity: Join one of the UK’s most exciting and rapidly scaling startups at the forefront of AI and data innovation. The office is London based with an expectation of 1-2 days in, this company is building an awesome consumer facing products with … just be writing code, you’ll be contributing to meaningful solutions that improve everyday lives, working in a tech-first, mission-driven environment that values your input across both engineering and product decisions. About the Role: We’re looking for a Senior Engineer with a background in functional programming to help build and scale impactful digital products. You’ll … the platform, evaluate new tools, and always be encouraged to push boundaries. What We’re Looking For: Experience in functional programming (Elixir, Scala, Go, Haskell, Clojure etc.) Strong backend engineering skills and a track record of building modern, reliable web applications. Familiarity with cloud platforms, ideally AWS. Experience with containerisation technologies (e.g Docker). Solid testing discipline and clean More ❯

Full Stack Engineer Build Bold Technology. Make a Meaningful Impact. Are you an experienced software engineer looking for more purpose in your work? Do you thrive in dynamic, start-up environments where your voice and skills truly matter? Excited by the idea of developing cutting-edge products that push boundaries and deliver real-world change? If this sounds like … Great Our client is a fast-growing Tech for Good start-up, born from world-class research and backed by serious ambition. They're developing a next-generation hardware-software product that combines deep tech innovation with real human impact. As part of a small, highly capable team, you’ll work at the forefront of product engineering - influencing … s what you’ll get to do: Contribute to the design and development of a groundbreaking new product from the ground up. Take a lead role in shaping the software architecture across the entire stack. Collaborate with cross-functional teams including UX, hardware, compliance and product. Code with clarity, scalability and maintainability in mind – always thinking a few steps More ❯

Software Engineer 📍 Lebanon or Egypt (Remote-first with flexibility) 💰 Competitive Salary + Equity 🕐 Full-time About Vennre Vennre is a next-generation wealthtech platform giving HENRYs (High Earners, Not Rich Yet) access to exclusive, Sharia-compliant private market investments. Traditionally reserved for institutions, we’ve redesigned the experience to make private markets more transparent, intuitive, and inclusive — with over … 20M transacted and users across the MENA region and Europe. We’re now hiring a Software Engineer to help us scale our web and mobile platforms — making investing simpler, faster, and more transparent. 🧩 About the Role You’ll work on a lean, product-focused engineering team responsible for building our customer-facing apps and backend systems. This is … Write clean, maintainable, well-documented code Optimise for performance, reliability, and scalability Collaborate with Product, Design, and Growth teams to deliver value 🧠 Qualifications 4–6 years of experience in software engineering (startup or fintech preferred) Strong command of React, TypeScript, Node.js, and SQL Experience working with Remix, Supabase, or Capacitor a plus Familiarity with mobile development and responsive More ❯

Staff Software Engineer - Backend - London Hybrid Want to work at one of the fastest growing investment platforms? Well you might be able to... With over 1 million customers, multiple industry awards, and a mission to make investing accessible and commission-free, this company is reshaping how everyday people build their financial futures. They’re looking for a Staff Backend … creating automation tools, and driving improvements to system ] performance and reliability as the platform scales. Requirements 7+ years’ experience with any backend technology Start-up experience Degree (Computer Science, Software Engineering or related) The role offers a salary of up to £130K plus benefits/Private Health/Enhanced Pension More ❯

Software Engineer - Java - Contract - £400 per day outside IR35 - Java/Microservices, Basic Test framework knowledge, Unit testing skills, Java design skills, Deployment in Pipeline knowledge ( Git lab, Jenkins, Aws tools sets) About the Company My client is seeking a Java Software Engineer on a contract basis in order to deliver Premium AIS in 2025. They are a … MVP Full E2E testing as part of deployment, in collaboration with business partners Own and lead E2E deployment (release train manager) Manage the technical delivery of one or more software engineering teams Lead the planning, specifying, developing and deploying of high performance, robust and resilient systems Designs, produces, tests and implements working software, working across the lifecycle More ❯

C++ Software Engineer (12 month FTC)🚀 💰 £70k + bonus 💼Hybrid - 3 Days p/week onsite Join a reputable company that are seeking a skilled C++ developer to join their team in building a high-performance market data platform on a 12 month FTC (with the potential for this to be extended by another year). They work on … processing and distributing vast amounts of real-time financial data to internal systems and external clients. Handling billions of messages daily from direct exchange connections, they require strong engineering capabilities to ensure efficiency, reliability, and scalability. Key Responsibilities: 📊Enhance the efficiency of systems responsible for the global delivery and storage of massive real-time data streams. 🚀 Diagnose and solve … required) 🔧 Proficiency in STL and Boost for efficient programming 🎓 Degree in Computer Science or a related field (or equivalent experience) 🖥️ At least 2 years of real-world experience in software development What We Offer: 🏆 £70K Salary 🏠 Flexible Hybrid Working - 3 Days p/week onsite 💰 Bonus Ready to make an impact? Apply now More ❯

As a GPU Software Engineer, you’ll be translating innovative research into high-performance, high-quality GPU compute solutions—playing a key role in delivering next-generation media technology to the market. Hybrid working, 3 days onsite and 2 days working from home. Key Skills & Qualifications: Degree in Electronics Engineering, Computer Science, or a related field. Proven experience … platform solutions for operating systems including Windows, Linux, iOS, and Android. Enhance, maintain, and expand existing codebases (C/C Python). Integrate third-party commercial and open-source software components. Produce clear and well-structured technical documentation, including specifications, APIs, and integration guides. Support external partners and customers in integrating SDKs. Test and evaluate complex signal processing code More ❯

Software Engineer (AI specialist) At Cogna, we're working hard to solve the productivity crisis. Improving the productivity of everyday workers is absolutely necessary to solve the biggest problems of our time, such as climate change, affordable healthcare and social equality. Unfortunately, the productivity crisis is not a single problem that can be tackled with a silver-bullet solution … driven challenges across every facet of every organisation. Each of these problems requires a tailored solution, and we must provide those quickly and at scale. Affordable, tailor made, productive software is Cogna’s mission.. We’re creating an AI-powered platform that understands the pain points in every customer's business , defines the requirements, and develops the software fully automatically. The result is high-quality, precision software at scale. Since our launch in May 2023, we’ve already seen significant traction and customer revenue that outpaces most companies. We’re backed by top VCs, including Notion Capital and Hoxton Ventures, and we’re growing our world-class team and are looking for people that want to More ❯

first one is MagicNotes . Between these products, there’s a huge amount of exciting and important work to do, and we need more folks to join our talented engineering team. We’ve already seen incredible growth from our MagicNotes product - that is helping case workers save over 8 hours a week of admin. Our usage has increased drastically … and we are now processing 1000+ hours of audio from caseworkers a week . This is just the beginning. The opportunity at Beam We’re looking for a Lead Software Engineer, reporting to the CTO, with a product-mindset and a passion for AI to lead one of our product teams to help build the future of Beam with … in return for building these critical features Who we’re looking for Wants to move into management or has management experience and is keen to build a high-performance engineering culture We are happy to consider people without explicit management experience Breadth of experience across infrastructure, backend and frontend technology stacks We use the latest Ruby on Rails, Turbo More ❯

Software (Product) Engineer | London | Hybrid | Up to £120,000 About the Company: Albert Bow has partnered with an innovative venture capital firm. They back early stage founders using tech to solve the world’s biggest problems, think synthetic biology, energy, healthcare, space, and more. They believe building world changing companies and creating massive value can go hand in hand. … innovation across synthetic biology, AI, energy, and more Skills Needed: Skilled in React, Typescript, and modern JavaScript frameworks Proficient in backend language e.g. Python Previous experience within an innovative engineering culture or startup environment Passionate attitude, keen to learn, fail and grow Love for building and shipping products with a genuine excitement for tackling world’s toughest problems Benefits More ❯

by significant investment, this giant has expanded rapidly in the UK and is seeking multiple Senior Developers to lead new squads focused on greenfield projects. They have a strong engineering culture in the London office, and as their Senior Developer, you’ll work with Java and Spring Boot. They’ve got their own internal cloud and tooling's, using More ❯

Principal Software Engineer - Java, Leadership - London (Hybrid) One of my consulting clients in London is looking for a Principal Software Engineer to lead a development team working on an exciting project. Key Skills: Java Development Springboot Microservices REST APIs Cloud (AWS Ideally or Azure) Leadership experience Mobile app development Exposure to retail industry (not essential) Key Responsibilities: Lead More ❯

Software Engineer – Python | London | AI x Real Estate I'm working with a cutting-edge AI platform that's transforming how real estate investors make high-stakes decisions - by combining powerful data with intelligent automation. They're now building an AI-driven chatbot to simplify financial modelling through natural language - and they’re hiring a Software Engineer to More ❯

Have you got 1-2 years experience as a Java Developer and are looking for the next step in your career? Junior Software Engineer – Global FX Trading Location – 3 days hybrid in London Salary - £55-65,000 + up to 50% bonus Our longstanding partner, who are leading at the forefront of FX trading around the world, are on … the hunt for a Junior Software Developer who has approx. 1 year experience developing software in the financial space using Core Java without frameworks, to join the London team. Having been born from one of London’s largest trading firms, they are now expanding into global markets with their high performant FX trading products, consuming over 5 billion … messages a day. This is an excellent position for a Junior Software Developer looking for their second job as you will be working alongside and learning from some of the smartest engineers on the market, with incredible career progression opportunities to rapidly build your career up to senior. A Junior Software Developer must have the following experience: Core More ❯

Staff Software Engineer – THE AI Scale-Up of 2025 | Future Unicorn Up to £160,000 plus excellent stock options Remote First – London Office for those who want it Next.js | React | Typescript | Node | Python Are you a product-focused Staff Software Engineer who enjoys autonomy and wants to build products from end-to-end? If so, read on... Staff … Software Engineer – We have been exclusively engaged by one of the most exciting tech scale-ups in the UK, who are looking for a Staff Software Engineer as they grow significantly in 2025. They are well-funded, revenue-generating and have found product market fit for their industry disrupting, AI-powered SaaS platform. The Staff Software Engineer … outstanding user experience to their customers. They believe in building fast and iterating, working closely with product and customers, to evolve their cutting-edge AI solutions. What is Staff Software Engineer for them? The Staff Software Engineer will have experience of leading the design and build complex solutions in product-driven companies with good knowledge of some or More ❯

Senior C# Engineer C# Software Developer City of London, On-site Perm Role: £90,000 - £120,000 Harrington Starr has partnered with an innovative proprietary trading firm headquartered in the City of London. They are seeking to hire a Senior Software Engineer with extensive experience across the Microsoft technology stack. What you will get: A chance to work More ❯

X10 Go/Golang Software Engineers – Fintech – Start-up/Scaleup Environment – 100% Project based – FULLY REMOTE – Offices based in LONDON 🌳🌳🌳 Tech stack: Go/Golang/React/React Native/PHP/Next.JS Areti Group has exclusively partnered with a rapidly growing fintech company based in London who are building out a greenfield team and looking for … up to 40 new Software Engineers with experience working with highly scalable microservice architecture by the end of the year. This is one of the most exciting companies to work for in the UK. These roles are FULLY REMOTE and offer you the choice of laptop and tech equipment to make sure you can be the best version of … yourself. They are just about to start a heavy recruitment drive and looking for up to 20 new Software Engineers at all different levels from Mid-level to Staff Engineers. They have 20 roles signed off now with a further 20 being signed off throughout the year. You must be based in the UK and have a real passion More ❯

Senior Software Engineer/Tech leads – React Native/PHP/React/Golang – Tech For Good -Scaleup Environment – 100% Project based – FULLY REMOTE – Offices based in UK 🌳🌳🌳 Candidates can be based anywhere in the UK as long as they are comfortable working in a remote environment. Areti Group has exclusively partnered with a rapidly growing fintech company based … in London who are building out a greenfield team and looking for up to 40 new Software Engineers with experience working with highly scalable microservice architecture by the end of the year. We are now on the lookout for Software Tech Leads/Staff Engineers who will tech control and direction of a number of different software … teams. These roles are FULLY REMOTE and offer you the choice of laptop and tech equipment to make sure you can be the best version of yourself. As a software team lead/staff engineer working for this organization, you must be able to show that you are willing to self-develop and have a real passion for what More ❯

X10 Go/Golang Software Engineers – Fintech – Start-up/Scaleup Environment – 100% Project based – FULLY REMOTE – Offices based in LONDON Tech stack: Go/Golang/React/React Native/PHP/Next.JS Areti Group has exclusively partnered with a rapidly growing fintech company based in London who are building out a greenfield team and looking for … up to 40 new Software Engineers with experience working with highly scalable microservice architecture by the end of the year. This is one of the most exciting companies to work for in the UK. These roles are FULLY REMOTE and offer you the choice of laptop and tech equipment to make sure you can be the best version of … yourself. They are just about to start a heavy recruitment drive and looking for up to 20 new Software Engineers at all different levels from Mid-level to Staff Engineers. They have 20 roles signed off now with a further 20 being signed off throughout the year. You must be based in the UK and have a real passion More ❯

Senior Software Engineer/Tech leads – React Native/PHP/React/Golang – Tech For Good -Scaleup Environment – 100% Project based – FULLY REMOTE – Offices based in UK Candidates can be based anywhere in the UK as long as they are comfortable working in a remote environment. Areti Group has exclusively partnered with a rapidly growing fintech company based … in London who are building out a greenfield team and looking for up to 40 new Software Engineers with experience working with highly scalable microservice architecture by the end of the year. We are now on the lookout for Software Tech Leads/Staff Engineers who will tech control and direction of a number of different software … teams. These roles are FULLY REMOTE and offer you the choice of laptop and tech equipment to make sure you can be the best version of yourself. As a software team lead/staff engineer working for this organization, you must be able to show that you are willing to self-develop and have a real passion for what More ❯

work across a broad range of internal systems that support critical business functions like customer service, order processing, and fulfilment. The environment is modern, collaborative, and values clean, scalable software that solves real business problems. Tech Stack: C#/.NET Core Angular (or similar SPA frameworks) SQL Server/Entity Framework REST APIs/Swagger Git/Bitbucket Bonus More ❯

a multimodal data warehouse that unifies storage and querying for highly complex domains — including genomics, financial & time series data, weather and much more. They are looking for a Senior Software engineer to join their team in London on a full-time basis What You’ll Do Architect and implement high-performance data processing systems in Rust Leverage Apache Arrow … worked with or contributed to analytical databases like ClickHouse, DuckDB, or DataFusion Understand memory management, file formats, and query execution pipelines Are passionate about open-source and care about software craftsmanship Thrive in a startup environment Want to help reinvent how data is queried, streamed, and embedded? Click Apply now or send your CV to Chinmaye.ramnath@james-chase.com *This More ❯