16 of 16 Permanent Senior Full-Stack Engineer Jobs in London

Senior Full-Stack Engineer London AI Start-up Up to £120,000 + Shares + Private Healthcare + Pension Were working with a well-funded AI start-up in London thats gearing up for huge growth. Theyre expecting to scale 10x over the next 18 months. Theyre now looking for a Senior Full-Stack Engineer to help design and build the next generation of their AI-driven platform. Reporting directly into the CTO and collaborating closely with product and research teams, this is a unique chance to take ownership across the stack and make a lasting impact in a company at the … big plus. The role is full-time, 3/4 days a week in their London office. What theyre looking for Strong experience as a Full-Stack Engineer across React, Next.js, Node.js, and Python. Solid knowledge of SQL databases and data modelling. Hands-on experience with cloud platforms (AWS or GCP). More ❯

R ole: 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 that’s scaling fast … and rewriting the rulebook in green-energy tech. They’re growing. They’re 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 you just “pick up tickets”, this isn’t … Product Engineer. Therefore, if you want ownership, modern tech, and work that actually matters? This one’s worth a serious look. Why This Role Rocks You work full-stack: TypeScript, Node, React, React Native (bonus). You ship features end-to-end — design → build → deploy → monitor. You join a proper engineering culture: smart people, no ego More ❯

Senior Full-Stack Engineer London AI Start-up Up to £120,000 + Shares + Private Healthcare + Pension Were working with a well-funded AI start-up in London thats gearing up for huge growth. Theyre expecting to scale 10x over the next 18 months. Theyre now looking for a Senior Full-Stack Engineer to help design and build the next generation of their AI-driven platform click apply for full job details More ❯

R ole: 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 you just pick up tickets, this isnt it. Im looking for … fledged Product Engineer. Therefore, if you want ownership, modern tech, and work that actually matters? This ones worth a serious look. Why This Role Rocks You work full-stack: TypeScript, Node, React, React Native (bonus). You ship features end-to-end design ? build ? deploy ? monitor. You join a proper engineering culture: smart people, no ego More ❯

Senior Full Stack Engineer We are seeking a talented Senior Full Stack Software Engineer to join a leading global investment management firm in London. Paying up to 120k plus bonus per annum, you will contribute to the development, optimisation, and design of front-office … applications, collaborating with portfolio managers and product owners to create innovative and high-performance solutions. As a Senior Full Stack Software Engineer, you will play a key role in developing and delivering critical investment management tools and systems. Your expertise will be essential in ensuring the optimal performance of the firm's More ❯

Senior Full Stack Engineer Are you a pragmatic, innovative, and self-motivated problem solver with a passion for building scalable, high-performing software? We're looking for a Senior Full Stack Engineer to join a high-performing product team working on a global, high … performance to ensure fast, seamless user experiences Contribute to continuous improvement efforts, introducing new ideas and technologies What You'll Bring Proven experience as a Full Stack Engineer or similar role Expertise in React, JavaScript/TypeScript, HTML, CSS , and responsive design principles Strong understanding of Back End technologies and best practices Passion for 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. What you will be doing: • Build robust and scalable software for business critical, web-based applications • Build eye-catching … a domain expert for one or more of Ki's core technologies • Mentor and coach colleagues in both engineering and business domain subjects Requirements • 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 ❯

R ole: 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 More ❯

Full Stack) - OAuth2, AWS IAM, React, Node.js, C# Join a global B2B SaaS leader as a Senior Full Stack IAM Engineer, driving secure, scalable identity and access management across multiple products. This permanent role offers the chance to shape authentication … and authorization services in a cutting-edge, AI-driven environment. About the Role: Own the IAM platform, designing and operating OIDC-compliant IDPs (Auth0, Okta, Cognito) Build full-stack features in TypeScript, Node.js, React, and C#/.NET Deliver secure login, SSO, MFA, RBAC/ABAC, and tenant isolation at scale, leveraging AWS services (Lambda, IAM … Collaborate across Product, Security, and Engineering teams, embed identity into new features, and uphold engineering excellence through CI/CD, testing, and incident response Required experience: Strong full-stack skills (TypeScript/Node.js, React, C#/.NET) Proven experience with OIDC-compliant IDPs (Auth0, Okta, Cognito) Deep knowledge of auth standards (OAuth2, OIDC, SAML, JWTs) Solid More ❯

their operations and make strategic, data-driven decisions. This is a unique opportunity to shape both the technical foundation and crew culture from the ground up. As a Senior Engineer, your mission is to: Drive Product Excellence : Develop features and solutions that directly align with our strategic business goals and deliver real value to our customers. … or CSS-in-JS solutions. Backend Proficiency : Solid experience with server-side technologies such as Scala, Java, , or Python, and expertise in building and consuming RESTful APIs. Full-Stack Integration : Experience bridging frontend and backend systems, including API design, data flow optimisation, and end-to-end feature development. Strong foundation in unit testing, clean code practices More ❯

our customer base and collection of spaces span across the world. Job Description We are looking for a Senior Front-End Engineer (or Full-Stack with strong frontend skills) whose primary responsibility is to further build our web app and mobile apps. This role is key to delivering ONDA''s product to More ❯

Senior Full Stack Engineer/Developer (TypeScript Elixir AWS) London/Hybrid Up to £100k + Equity Join a fast-growing energy trading data scale-up as a Senior Full Stack Engineer, working on complex greenfield systems that demand scalability, reliability and clean architecture. More ❯

Senior Full Stack Engineer/Developer (TypeScript Elixir AWS) London/Hybrid Up to £100k + Equity Join a fast-growing energy trading data scale-up as a Senior Full Stack Engineer, working on complex greenfield systems that demand scalability, reliability and clean architecture. More ❯

our roadmap, providing technical input on our strategy and product roadmap Requirements Fluent English language speaker. Experience: 5-8 years as a full-stack engineer building production web applications 2+ years at early-stage startups (seed to Series B) Led technical delivery of 2+ substantial features end-to-end (0→production), including architecture decisions … A company redefining cross-border commerce. A collaborative, high-performance environment spanning London, Shanghai, and beyond. Competitive salary, performance-linked incentives, and flexible working arrangements. Direct exposure to senior leadership, global brand partners, and leading consumer platforms. More ❯

An exciting opportunity for an experienced Full-Stack Engineer to help transform a major Fixed Income front-office technology landscape. You'll architect and deliver high-performance, real-time React applications that support trading workflows, working closely with stakeholders to shape a scalable, future-ready platform. Key … Responsibilities: Design and develop modern, real-time React/Java applications for trading workflows Work closely with engineers to build robust, scalable, and low-latency systems Lead full-stack solution design, with a focus on backend performance, reliability, and system integration Translate business and technical requirements into cohesive system architectures Promote engineering excellence, modern development practices … in backend development, ideally with Java, REST APIs, and messaging frameworks Deep understanding of architecture and system design, including distributed and low-latency systems Ability to drive full-stack solutions, with a strong backend focus and solid UI fundamentals Demonstrated experience within a Rates or broader Fixed Income trading environment Strong appreciation for system-level design More ❯

and help fashion partners find better audiences as the category-leading destination for every fashion shopper. The Opportunity We are seeking a Senior Full Stack Engineer to join the Member Experience squad. This is a highly collaborative, cross-functional team focused entirely on elevating the journey for our registered Lyst members. You … work will span across the entire membership ecosystem, including the primary website, mobile application, CRM database, and our push-notification/email services. Our collective goal is to engineer seamless, engaging experiences that maximize member retention and value. Requirements Core Responsibilities Lead the development and maintenance of features (both client-side and server-side) critical to our e More ❯