20 of 20 Permanent Senior Full-Stack Engineer Jobs in London

Senior Full-Stack Engineer (Backend-Leaning) – SaaS + AI Join a seed-stage SaaS startup backed by leading VCs, adopting AI to redefine their product. They’re pre-PMF, mid-pivot, and need a hands-on engineer (~80% coding … help build, define, and scale. 💰 Comp: Up to £100k + strong early stack equity package 🧑 💻 What you’ll do Full-stack engineering, backend-leaning (Next.js FE + BE, Node.js, TypeScript, legacy Python) Collaborate with product & CEO to shape the roadmap Help guide a small ...

Senior Full-Stack Software Engineer London (Victoria) · 3 days in office · £100,000 – £120,000 · Permanent Our client is a newly launched, VC-backed tech business operating in a highly traditional professional services sector. Founded by repeat founders with a track record … delivered. The opportunity This is a rare greenfield engineering role at a genuinely early-stage business. The successful candidate will join a small, senior founding team and take real ownership of the technical foundation from day one — building the stack, setting the architecture, and establishing ...

Senior Full Stack Engineer (Frontend Focus) Location: London (Hybrid) 1 day a week Salary: up to £90,000 Evantis Technology is working with a fast-growing digital marketplace platform operating in the creative/consumer space, helping them hire a Senior … high-impact features Contributing to technical discussions around architecture, scalability and product direction What they’re looking for Strong experience as a full-stack engineer with a frontend bias, particularly with modern JavaScript/TypeScript frameworks Comfortable contributing across both frontend and backend services ...

Title: Senior Full-Stack Engineer – Web Platform & Integrations Company: Broadlab Location: Covent Garden, London About Broadlab Broadlab is a dynamic, fast-growing business on a mission to simplify and optimise Addressable TV advertising on behalf of our agency partners and their clients. … analytics and optimisation logic into intuitive, performant user interfaces. Qualifications/Requirements Experience – 5+ years of professional experience in front-end or full-stack engineering, ideally within high-growth or startup environments. JavaScript Expertise – Strong fundamentals in modern JavaScript (ES6+), modular architecture, and browser behaviour. Framework ...

About the Role We are seeking a Senior Full-Stack Engineer to join our team and help build the next generation of AI solutions. This is a unique opportunity to be a key technical contributor in a fast-paced, innovative environment where … wear many hats and have significant impact on our product and engineering culture. As a full-stack engineer, you'll work across the entire technology stack—from backend services and data pipelines to infrastructure and deployment. You'll collaborate closely with ...

Senior Full Stack Engineer (Node.js/React) Location: London (Hybrid) Salary: up to £100,000 We’re working with a well-funded, early-stage startup building a next-generation, AI-powered platform in the fintech/regtech space. They’re looking … Senior Full Stack Engineer to play a key role in scaling a modern microservices architecture and shaping the future of the product. What you’ll be doing: • Designing and building scalable microservices using Node.js (Nest.js) and React • Driving an API-first architecture ...

Senior Fullstack Software Engineer Location: London (3 days in the office) Contract Type: Permanent Salary: Up to £110,000 (DOE) plus stock options, private medical/dental, and £1,200 L&D budget Build fullstack platforms that generate real social impact globally, from user-facing experiences … fastest-growing companies in the UK, combining commercial success with meaningful social good. They're looking for a fullstack software engineer to join their London team and help build platforms that have already had a huge impact on the world. If you have 4+ years of professional software ...

Join an elite engineering team building a high‐performance trading platform. Are you a seasoned Full‐Stack Engineer who thrives in highly technical, autonomous environments? Do you love designing reliable, long‐lived systems and solving complex performance challenges? A leading engineering organisation is hiring … Senior Full‐Stack Engineer to join an established trading platform development programme for a major enterprise client. Although the wider business is recognised for distributed ledger and advanced cryptography work, this role focuses on a non‐blockchain, production‐critical trading platform built ...

Senior Fullstack Engineer (Backend) Hybrid/Remote - has to be based in London Role Overview We’re looking for a Senior Full Stack (Backend) Engineer who thrives on building clean, scalable systems quickly. You’ll play ...

vision, and we're looking for people who want to build something that matters from the ground up. About the role As a Senior Software Engineer at Clearly, you will own and shape the full technical stack - from the data pipelines that … closely with product and commercial teams to ship features that create direct customer value What we’re looking for Proven experience as a senior or lead engineer across the full stack — backend, data, and frontend Strong fundamentals in building and maintaining data ...

Senior/Lead Full Stack TypeScript Engineer 📍 Remote/Hybrid 💰 Up to £130k + Up to 0.3% Equity We’re looking for a Senior/Lead Full Stack TypeScript Engineer with 5+ years … real product impact Work closely with experienced founders and operators Competitive salary and equity Flexible working environment If you're a strong TypeScript engineer who enjoys building in high-growth startup environments, apply directly or reach out to learn more. ...

build, scale, and innovate at the edge. The Role We're looking for a full-stack software engineer with Angular, TypeScript, and Node.js experience to help build the next generation of Verifi's SaaS platform. You'll be contributing to both frontend and backend … application stack. What You’ll Do Write clean, maintainable code across the Angular frontend and Node.js backend services. Learn and contribute to full-stack architecture—understanding patterns, quality standards, and modern best practices for both client and server-side development. Collaborate cross-functionally with Product Management ...

recognized digital product studio that sits at the sweet spot of high-end aesthetic design and hardcore engineering. They're looking for a Senior & Lead Full-stack Engineer to join the growing function. This isn't a "ticket-taking" role. This ...

role: Must-have Skills: Strong fundamentals in Software Engineering. Direct experience with TypeScript and React. Proven ability to adapt across different full-stack environments. Demonstrated high performance in fast-paced, dynamic environments. Strong adaptability to shifting priorities and self-organizing teams. Clear and effective communication skills ...

GenAI Full Stack Engineer - Consultant Salary: £45,000 - £55,000 plus benefits, perks and healthcare options Job Type: Permanent - Hybrid/2 x days per week - Travel to client site Base Locations: London, Manchester, Newcastle, Glasgow Overview: We're looking for a GenAI Full Stack Engineer who is passionate about solving real-world challenges through technology. You'll work closely with senior stakeholders both internally and within key clients to create GenAI strategies that translate business issues into relevant technical solutions and competitive propositions that ...

thoughtfully rather than rewriting it, and being trusted to deliver without heavy supervision, this role will feel unusually well-matched. The role As Senior Fullstack Software Engineer, you will help design, build and maintain the production systems that power Outsmart’s platform. You’ll work closely … systems that matter. The environment We are a small, intellectually serious company. That has advantages and responsibilities. You will: Speak directly with senior decision-makers when needed Operate without perfect documentation Balance speed with long-term maintainability This role suits someone comfortable with autonomy, accountability and cross-functional ...

global consulting company is looking for a Full Stack Developer & Power Platform Engineer in Greater London. You will design and build applications, utilize .NET Core and C#, and contribute to architectural decisions. Candidates should have 7-10+ years of full stack ...

versatile full stack engineer who thrives on variety and innovation? We’re hiring two engineers to join a newly formed Special Operations team — dedicated to building out initiatives that can’t be supported by busy delivery teams. Think of this as the Swiss Army ...

Benefits 9% pension contribution Stock Options Health Insurance L&D Budgets This is your chance to perform the job you love and make a difference in society whilst doing it! Help this one-of-a ...

GenAI Full Stack Engineer - Consultant Salary: £45,000 - £55,000 plus benefits, perks and healthcare options Job Type: Permanent - Hybrid/2 x days per week - Travel to client site Base Locations: London, Manchester, Newcastle, Glasgow Overview: We're looking for a GenAI Full Stack Engineer who is passionate about solving real-world challenges through technology click apply for full job details ...