1 to 25 of 48 Senior Full-Stack Engineer Jobs in the City of London

About the Role: We are seeking a highly experienced and versatile Senior Software Engineer with deep expertise across quantitative development, infrastructure engineering, and full-stack development, to join and lead a high-performance team. The ideal candidate thrives at the intersection of finance and technology, has led engineering teams, and has built More ❯

DM me (JJ) on WhatsApp +447855553652 with one tradeoff you’ve made while shipping fast, and what you’d do differently in hindsight. https://getjelly.notion.site/senior-full-stack-jelly More ❯

Senior Software Engineer/Developer (Full Stack JavaScript) London to £100k Opportunity to progress your career in a senior, hands-on Software Engineer role at a scale-up tech company, that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining processes … years, with recent funding of £125 million. You'll be working on complex and interesting systems and can enjoy a range of benefits and perks. As a Senior Software Engineer you'll collaborate as part of an Agile technology team to design and develop, troubleshoot and solve complex software issues to help scale and future proof … happy to mentor more junior developers You're likely to be degree educated in Computer Science or similar tech discipline What's in it for you: As a Senior Software Engineer you will receive a competitive package: Salary to £100k 25 days holiday (increasing to 30), plus Christmas Eve Vitality healthcare plus a host of wellbeing More ❯

About POSTX POSTX's vision is to change the way the world moves goods with zero carbon emissions by providing a transportation and logistics platform that enables our customers to reduce costs, improve service and avoid 100% tailpipe emissions. Our More ❯

Senior Full-stack Engineer Location : Remote Job Type : Full-time Help us reinvent the CFO🚀 At Nume, we’re pioneering the world’s first AI CFO. Not a chatbot or a dashboard, but a proactive thought partner that founders can trust with real financial decisions. Ultimately, a solution that will … ll help us develop our comprehensive platform while contributing to our AI architecture - a state-of-the-art, autonomous and goal-driven system. You'll bring deep full-stack expertise and help us accelerate development across our entire technology stack. Key Responsibilities: Build and enhance our application Develop robust front-end interfaces and back-end services … end-to-end solutions Architect systems that will serve thousands of users Support AI system integration and contribute to prompt engineering efforts Required Qualifications: 5+ years developing full-stack software applications Expert-level Python skills Strong experience with modern web frameworks (FastAPI, Django, Flask) Proficiency in frontend technologies (React, TypeScript, JavaScript) Experience with databases (PostgreSQL, MongoDB More ❯

Senior Fullstack Engineer | £80,000 – £95,000 + Equity | TypeScript | React Native | Node.js | Serverless | Hybrid (1-2 Days in London) Join one of Europe’s most exciting consumer fitness startups—fresh off a £5M fundraise, recognised by Apple as a finalist for Global App of the Year, and recently acquired by a category-defining global fitness … and Apple Watch apps already live, they’re scaling their engineering team to take their platform to the next level. This is a rare opportunity to build full-stack features across mobile, web, and backend systems—in a mission-led, product-obsessed, high-performance team. 🧑‍💻 What You’ll Do: Design, build, test, and ship new features … AppSync, DynamoDB, S3, EventBridge, SNS Tooling: GitHub Actions, Fastlane, Sentry, Mixpanel, Intercom, Maestro E2E, Terraform ✅ What You Bring: 4+ years of software engineering experience (frontend, backend or full-stack) Strong TypeScript and JavaScript skills Proven ability to ship end-to-end features across the stack Comfort working in fast-paced, iterative environments (they shipped More ❯

research, and data science. Our squads focus on delivering high-impact features – we favour a highly iterative, analytical approach. We're looking for a Senior Full-stack Engineer to join our Development team. Principal Accountabilities: • Build robust and scalable software for business critical, web-based applications • Build eye-catching, functional, efficient, and … for one or more of Ki’s core technologies • Mentor and coach colleagues in both engineering and business domain subjects Required Skills and Experience: • Experience as a mid-senior level engineer working across a modern web stack • Strong software engineering principles (SOLID, DRY, ER modelling) • Professional experience with a server-side language, ideally JVM More ❯

Senior Full Stack Engineer – THE AI Scale-Up of 2025 | Future Unicorn Up to £125,000 plus excellent stock options Remote First – London Office for those who want it Next.js | React | Typescript | Node Are you a product-focused Senior Full Stack Engineer who enjoys … autonomy and wants to build products from end-to-end? If so, read on... Senior Full Stack Engineer – We have been exclusively engaged by one of the most exciting tech start-ups in the UK, who are looking for Senior Full Stack Engineers as they will … They believe in building fast and iterating, working closely with product and customers, to evolve their cutting-edge AI solutions. What is Senior Full Stack Engineer for them? The Senior Full Stack Engineer will have experience of building complex solutions in product-driven companies More ❯

Senior Full Stack Engineer - THE AI Scale-Up of 2025 | Future Unicorn Up to £130,000 plus excellent stock options Remote First - London Office for those who want it Next.js | React | Typescript | Node Are you a product-focused Senior Full Stack Engineer who enjoys … autonomy and wants to build products from end-to-end? If so, read on Senior Full Stack Engineer - We have been exclusively engaged by one of the most exciting tech start-ups in the UK, who are looking for Senior Full Stack Engineers as they will … They believe in building fast and iterating, working closely with product and customers, to evolve their cutting-edge AI solutions. What is Senior Full Stack Engineer for them? The Senior Full Stack Engineer will have experience of building complex solutions in product-driven companies More ❯

Full Stack Engineer – Agentic AI-Powered FinTech Location: London/Hybrid (2 days per week in the office) Up to £130,000 per annum plus stock options Typescript | Node | React | Next.js | AWS | GraphQL Senior Full Stack Engineer - We’re partnering with a well-funded, cutting-edge … automate tasks, but collaborate with human analysts to generate insights, drive decisions and transform workflows. This is a unique opportunity for a Senior Full Stack Engineer who’s eager to work on ambitious, meaningful problems at the intersection of AI, UI/UX innovation, and financial software. You’ll help build a … and ripe for innovation. What’s the opportunity? As part of a small, senior-led product and engineering team, the Senior Full Stack Engineer will: Architect and implement responsive, AI-enabled interfaces using React, NextJS, and TypeScript Develop robust backend services with Node.js, connecting to external financial data and AI More ❯

Shape the Future of Global Credit Analytics Are you driven by the thrill of building products that matter? Do you want your code to empower the world’s top investment minds? At our company, you’ll help redefine how global More ❯

Senior Full Stack Engineer Salary £80k to £85k + Bonus and excellent pension/benefits Location: Central London About the client Our client is an infrastructure communications technology company providing end-to-end fibre solutions and now Cloud solutions, Wi-Fi, Firewalls/Security, SD WAN, Managed LAN and UC services for … businesses and wholesale/carrier/channel organisations across London. What you will do: We are looking for a Senior Full Stack Engineer to own end-to-end delivery of critical features, drive architectural excellence, and establish best practices. You ll work hands-on across React, Node.js, and Python services, own our … with product, operations and customer success to translate requirements into robust technical solutions. A good fit candidate will have: 5+ years hands-on as a full stack engineer in a SaaS environment Expert in React (hooks, state management, performance) Strong backend skills in Node.js (Express) and Python (FastAPI, Celery) Deep familiarity with Microsoft Azure More ❯

Join a fast-growing health tech company using AI to solve high-impact, real-world problems. Building tools that help frontline professionals reduce admin and focus on delivering care, my client are looking for engineers who want their code to More ❯

Senior Full Stack Engineer | $60m BioTech Startup - Synthetic Biology 💻 Senior Full Stack Engineer 🧬 $60m funded BioTech - Revolutionary synthetic biology 💰 Industry leading compensation package - Enquire for details 📍 3 Days per week - Central London ⚙️ Stack: Typescript, React, Python, WebGL (3d rendering), K8s, AWS I … This will unlock new possibilities in medicine, anatomical understanding, drug development and general biological research for generations. We are looking for a Senior Full Stack Engineer, proficient in a Typescript, React and Python based stack with Kubernetes and AWS . Experience with 3D rendering and visluatisation (e.g WebGL) and industry … using tech to advance human understanding and unlock new possibilities in areas such as molecular biology and genetic engineering. Are you a Senior Full Stack Engineer keen to contribute to the future of biological research and understanding? Apply within or reach out to James for more information on the role and compensation. More ❯

Senior Full Stack Engineer | $60m BioTech Startup - Synthetic Biology 💻 Senior Full Stack Engineer 🧬 $60m funded BioTech - Revolutionary synthetic biology 💰 Industry leading compensation package - Enquire for details 📍 3 Days per week - Central London ⚙️ Stack: Typescript, React, Python, WebGL (3d rendering), K8s, AWS I … This will unlock new possibilities in medicine, anatomical understanding, drug development and general biological research for generations. We are looking for a Senior Full Stack Engineer, proficient in a Typescript, React and Python based stack with Kubernetes and AWS . Experience with 3D rendering and visluatisation (e.g WebGL) and industry … using tech to advance human understanding and unlock new possibilities in areas such as molecular biology and genetic engineering. Are you a Senior Full Stack Engineer keen to contribute to the future of biological research and understanding? Apply within or reach out to James for more information on the role and compensation. More ❯

Senior Full Stack Engineer - London (Hybrid) - Up to £90k A well funded start up who are revolutionising real estate transactions through cutting-edge technology combining sophisticated AI capabilities with robust financial data systems are looking for a Senior Full Stack Engineer to join their … conception through deployment and iteration Ensure quality and performance of code through comprehensive testing and monitoring What are we looking for: At least 5+ years in professional full-stack software development Strong proficiency in Python for backend development Experience with modern frontend frameworks (React, Vue, Angular) Solid understanding of database technologies (PostgreSQL, MySQL) and data modeling More ❯

Social network you want to login/join with: Senior Full Stack Engineer | $60m BioTech Startup | Up to £150,000 + Stock, London (City of London) Client: Burns Sheehan Location: London (City of London), United Kingdom Job Category: Other EU work permit required: Yes Job Views: 3 Posted: 16.06.2025 Expiry Date: 31.07.2025 … Job Description: Senior Full Stack Engineer | $60m BioTech Startup - Synthetic Biology We are working with an exciting $60m funded BioTech startup specializing in synthetic biology, leveraging advanced techniques in 3D rendering, generative AI, and machine learning to innovate in medicine, anatomical understanding, drug development, and biological research. We seek a Senior Full Stack Engineer proficient in Typescript, React, Python, with experience in Kubernetes and AWS. Experience with 3D rendering and visualization (e.g., WebGL) is desirable but not essential. You will collaborate with a small, skilled founding team to develop technologies that advance human understanding in molecular biology and genetic engineering. If you are More ❯

Senior Full Stack AI Engineer | Node.js | React.js | LLMs | Remote Europe | Up to £100K Maze is proud to be partnering on a retained basis with one of the fastest-growing platforms in the creator economy space to hire a Senior Full Stack AI Engineer . … This is a high-impact role for an expert Full Stack Engineer with demonstrable experience implementing AI models in production. Key Requirements Subject Matter Expert (SME) with Typescript, Node.js, React, Next.js Strong experience with LLMs, Image/Video generation, classification. Strong experience implementing AI models in production , through projects such as chatbots. Solid backend More ❯

Social network you want to login/join with: Senior Full Stack AI Engineer | Node.js | React.js | LLMs | Remote Europe | Up to £100K, london (city of london) col-narrow-left Client: Maze Location: london (city of london), United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Views … Posted: 04.06.2025 Expiry Date: 19.07.2025 col-wide Job Description: Senior Full Stack AI Engineer | Node.js | React.js | LLMs | Remote Europe | Up to £100K Maze is proud to be partnering on a retained basis with one of the fastest-growing platforms in the creator economy space to hire a Senior Full Stack AI Engineer . This is a high-impact role for an expert Full Stack Engineer with demonstrable experience implementing AI models in production. Key Requirements Subject Matter Expert (SME) with Typescript, Node.js, React, Next.js Strong experience with LLMs, Image/Video generation, classification. Strong experience implementing AI More ❯

Social network you want to login/join with: Senior Full-stack Engineers - TS + Node (BE leaning), London (City of London) Client: Oliver Bernard Location: London (City of London), United Kingdom Job Category: Other EU work permit required: Yes Job Views: 2 Posted: 16.06.2025 Expiry Date: 31.07.2025 Job Description: Senior Full … week) Skills: TypeScript, Vue, Node, AWS, GraphQL A rapidly growing Series-A tech start-up founded by two of Revolut's earliest hires is looking to hire several Senior Backend Leaning Fullstack Engineers experienced in TS, Vue, and Node. Requirements: Extensive experience with the NodeJS ecosystem and related technologies Experience with React or Vue Proven expertise with AWS More ❯

I am exclusively working with an Online Marketplace (C2C) who are looking for a Senior Full-Stack Engineer to join their team! You'll predominately be brought on board to work on their core platform and online marketplace. They are a Certified B CORP Organisation as well! They are forward thinking, collaborative … for a number of years and its a fantastic opportunity to join a really great team! They are looking for a Senior Engineer - Full-Stack and working on both the front and backend They are FULLY REMOTE and do not have office expectations. With this in mind, you'll need to be … This is a 2 stage interview process that will include a 30 min call with their CTO followed by a 90 minute technical/culture chat with their Senior Engineers & CTO They are offering up to £78,000 + bonus + a FULLY REMOTE role More ❯

I am exclusively working with an Online Marketplace (C2C) who are looking for a Senior Full-Stack Engineer to join their team! You'll predominately be brought on board to work on their core platform and online marketplace. They are a Certified B CORP Organisation as well! They are forward thinking, collaborative … for a number of years and its a fantastic opportunity to join a really great team! They are looking for a Senior Engineer - Full-Stack and working on both the front and backend They are FULLY REMOTE and do not have office expectations. With this in mind, you'll need to be … This is a 2 stage interview process that will include a 30 min call with their CTO followed by a 90 minute technical/culture chat with their Senior Engineers & CTO They are offering up to £78,000 + bonus + a FULLY REMOTE role More ❯

Senior Full-Stack Engineer (TypeScript & LLM Integration) I am currently recruiting on behalf of a forward-thinking technology company that is pioneering the integration of AI into B2B software solutions. We are seeking a highly skilled Senior Full-Stack Engineer with a strong foundation … fast-paced environment Preferred Qualifications Experience deploying and fine-tuning custom AI models Background in developing B2B software platforms with multi-user functionality If you are a driven engineer looking to work at the intersection of modern web development and AI innovation, I would be delighted to discuss this opportunity with you further More ❯

Social network you want to login/join with: Senior Full-Stack Engineer - AI Startup - TypeScript/LLM - £120k - Fully Remote, london (city of london) col-narrow-left Client: Opus Recruitment Solutions Location: london (city of london), United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Views … behalf of a forward-thinking technology company that is pioneering the integration of AI into B2B software solutions. We are seeking a highly skilled Senior Full-Stack Engineer with a strong foundation in TypeScript and a keen interest in working with Large Language Models (LLMs). This role offers the opportunity to … fast-paced environment Preferred Qualifications Experience deploying and fine-tuning custom AI models Background in developing B2B software platforms with multi-user functionality If you are a driven engineer looking to work at the intersection of modern web development and AI innovation, I would be delighted to discuss this opportunity with you further #J-18808-Ljbffr More ❯

Senior Full-Stack Engineer (TypeScript & LLM Integration) £80-110K + Equity A hugely exciting AI start-up is seeking several experienced Full-Stack Engineers to join a dynamic product team, focused on building innovative software powered by cutting-edge AI technologies. This is a unique opportunity for More ❯