376 to 400 of 2,190 Permanent Full Stack Engineer Jobs

We are partnering with an early-stage, mission-driven company at the intersection of AI and national defence to appoint exceptional Full Stack Software Engineers . This fast-growing organisation is transforming mission-critical combat planning and operational decision-making by building next-generation AI-driven software tools for western forces. Founded in 2023, the company … to deliver state-of-the-art SaaS capabilities leveraging NLP, Generative AI, and reinforcement learning technologies. Position location (hybrid): London (Shoreditch) or Paris (Le Marais) We are seeking Full Stack Engineers who are passionate about using technology to solve complex, real-world problems with meaningful societal impact. You will be joining a highly collaborative and talented … code that frequently gets deployed to users Strong understanding of product development and navigating large codebases Located in London/Paris and open to working in office Tech Stack: Python FastAPI Typescript + React Open source LLMs On premise deployments Benefits Currently Offered (likely to improve as company grows): 100% coverage for travel expenses Childcare support Min. More ❯

data accessible to marketing agencies and partners. We already have an initial dream team, with 4 members: A Product Manager A Product Designer A Data Scientist A Principal Engineer Now, we're looking for a Senior Full Stack Engineer (with strong front-end capabilities and a deep interest in generative AI ) to More ❯

Please review the job details below. Maxar is seeking a Senior Software Engineer to support a high-impact mission in a dynamic, fast-paced environment. This role involves developing, enhancing, and maintaining software systems used across networked, local, and internet-based environments. The ideal candidate will have strong experience across the full software development lifecycle and … a passion for building scalable, enterprise-level solutions in cloud environments. Location: This position is full time onsite in Annapolis Junction, MD. Responsibilities : Analyze, design, code, and enhance software systems, supporting both new development and improvements to existing applications. Use modern programming languages and technologies to build robust, scalable, and maintainable software. Collaborate with users and stakeholders to … C++). Experience working in multiple coding paradigms (object-oriented, functional, procedural, event-driven). Familiarity with unit testing and code path analysis. Proven experience implementing and executing full software lifecycles, including automated testing and integration. Background in code review processes and enforcing code quality standards. Demonstrated experience designing and deploying enterprise-level, distributed software systems in cloud More ❯

We are looking for an engineer with a solid foundation in programming and web connected applications, a high degree of drive and dedication, and the ability to learn quickly and hit the ground running. • BS degree in Computer Science or related field • Minimum of 2-5 years of experience • Strong Python programming background • Strong unit testing experience • Understands More ❯

We are looking for a Senior Fullstack Developer to design, build, and optimize robust, high-performance, and scalable web applications. You will work across the entire development stack, from user interface to backend integration, collaborating closely with technical teams, product owners, and designers. Your Responsibilities Develop user-friendly, efficient interfaces using Angular and CSS . Design and implement More ❯

Are you a senior software engineer with 2 -6 years of experience? Work in a collaborative environment in one of the fastest-growing sectors in AI. You will be working on real-time systems that process billions of hours’ worth of calls a year. Challenge yourself in our environment and see the impact of your work. We have More ❯

Full Stack Engineer - Java - React - TypeScript - API - Up to £520/day (Outside IR35) - Hybrid - 3 monthS - Immediate Starter Paying up to £520 per day (Outside IR35) We're a mission-driven tech company that builds products to help people make confident decisions about their finances and everyday services. From switching energy providers to More ❯

businesses to fulfil their duty of care by helping our customers make better decisions and stay ahead of risk, no matter where they are. As a Lead Fullstack Engineer, you'll be at the forefront of this mission, helping us to build a scalable geo-location platform which helps keep people safe wherever they are in the world. … Key Responsibilities: Leading the planning and delivery of roadmap features across the engineering stack Providing technical leadership and mentorship across the development team Ensuring secure coding, compliance, and architectural best practices are upheld Partnering with Product and QA to scope, define, and deliver on engineering objectives Contributing to and review the development of services, ensuring scalability and reliability More ❯

Job Responsibilities Quick (small) features. Within this team of 4-5 members, you will utilize your skills in TypeScript, Express, Node.js, Next.js, SQL, and React to enhance and develop our platform.You should feel comfortable occasionally assisting customers and take pleasure More ❯

Benefits 39 days holiday 9% pension contribution Stock Options This is your chance to perform the job you love and make a difference in society whilst doing it! Help this one-of-a-kind Social Good platform change the world More ❯

Benefits 39 days holiday 9% pension contribution Stock Options This is your chance to perform the job you love and make a difference in society whilst doing it! Help this one-of-a-kind Social Good platform change the world More ❯

Backend Engineer, Python, Go, Cloud Infrastructure | AWS, Full-stack mindset, TypeScript | AI, B2B Scale-up | £550 - 650pd Outside IR35 | 6-month contract | London, Hybrid Our client is building industry leading AI, and they are looking for exceptional Backend Python Engineers at a Senior/Principle level. Key requirements are: Proven Python or Go experience … +4 years and over 6+ years in total commercial experience in Software Ability and comfort in working as a generalist Software engineer - across the Full stack. Picking up languages and challenges whenever needed. Always being curious. Excellent Cloud and Data Infrastructure experience Experience working on big tech platforms, as well as start-up/scale-up … engineering challenges Strong API exposure, designing and refining for scale If you wish to apply for the Backend Engineer, Python, Go, Cloud Infrastructure | AWS, Full-stack mindset, TypeScript | AI, B2B Scale-up | £550 - 650pd Outside IR35 | 6-month contract | London, Hybrid Contract role. Please apply HERE and we will reach out to you if More ❯

Backend Engineer, Python, Go, Cloud Infrastructure | AWS, Full-stack mindset, TypeScript | AI, B2B Scale-up | £550 - 650pd Outside IR35 | 6-month contract | London, Hybrid Our client is building industry leading AI, and they are looking for exceptional Backend Python Engineers at a Senior/Principle level. Key requirements are: Proven Python or Go experience … +4 years and over 6+ years in total commercial experience in Software Ability and comfort in working as a generalist Software engineer - across the Full stack. Picking up languages and challenges whenever needed. Always being curious. Excellent Cloud and Data Infrastructure experience Experience working on big tech platforms, as well as start-up/scale-up … engineering challenges Strong API exposure, designing and refining for scale If you wish to apply for the Backend Engineer, Python, Go, Cloud Infrastructure | AWS, Full-stack mindset, TypeScript | AI, B2B Scale-up | £550 - 650pd Outside IR35 | 6-month contract | London, Hybrid Contract role. Please apply HERE and we will reach out to you if 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 a passionate … About the Role The successful candidate will work within a unified codebase that powers both the B2B software platform and its custom AI capabilities. Responsibilities will span the full feature lifecycle, from design (including data structures) to AI integration, enhancing user experiences through advanced Large Language Models. Key Responsibilities Build and maintain web application features using TypeScript, React … and optimize the MySQL database Develop and maintain type-safe RPC endpoints using tRPC and TypeScript to ensure smooth frontend-backend communication Rapidly onboard to a modern TypeScript stack to support high-velocity feature development Required Qualifications Proven experience working in a unified codebase combining application logic and AI/LLM components Strong proficiency in building modern web 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 a passionate … About the Role The successful candidate will work within a unified codebase that powers both the B2B software platform and its custom AI capabilities. Responsibilities will span the full feature lifecycle, from design (including data structures) to AI integration, enhancing user experiences through advanced Large Language Models. Key Responsibilities Build and maintain web application features using TypeScript, React … and optimize the MySQL database Develop and maintain type-safe RPC endpoints using tRPC and TypeScript to ensure smooth frontend-backend communication Rapidly onboard to a modern TypeScript stack to support high-velocity feature development Required Qualifications Proven experience working in a unified codebase combining application logic and AI/LLM components Strong proficiency in building modern web 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 a passionate … About the Role The successful candidate will work within a unified codebase that powers both the B2B software platform and its custom AI capabilities. Responsibilities will span the full feature lifecycle, from design (including data structures) to AI integration, enhancing user experiences through advanced Large Language Models. Key Responsibilities Build and maintain web application features using TypeScript, React … and optimize the MySQL database Develop and maintain type-safe RPC endpoints using tRPC and TypeScript to ensure smooth frontend-backend communication Rapidly onboard to a modern TypeScript stack to support high-velocity feature development Required Qualifications Proven experience working in a unified codebase combining application logic and AI/LLM components Strong proficiency in building modern web 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 a passionate … About the Role The successful candidate will work within a unified codebase that powers both the B2B software platform and its custom AI capabilities. Responsibilities will span the full feature lifecycle, from design (including data structures) to AI integration, enhancing user experiences through advanced Large Language Models. Key Responsibilities Build and maintain web application features using TypeScript, React … and optimize the MySQL database Develop and maintain type-safe RPC endpoints using tRPC and TypeScript to ensure smooth frontend-backend communication Rapidly onboard to a modern TypeScript stack to support high-velocity feature development Required Qualifications Proven experience working in a unified codebase combining application logic and AI/LLM components Strong proficiency in building modern web 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 a passionate … About the Role The successful candidate will work within a unified codebase that powers both the B2B software platform and its custom AI capabilities. Responsibilities will span the full feature lifecycle, from design (including data structures) to AI integration, enhancing user experiences through advanced Large Language Models. Key Responsibilities Build and maintain web application features using TypeScript, React … and optimize the MySQL database Develop and maintain type-safe RPC endpoints using tRPC and TypeScript to ensure smooth frontend-backend communication Rapidly onboard to a modern TypeScript stack to support high-velocity feature development Required Qualifications Proven experience working in a unified codebase combining application logic and AI/LLM components Strong proficiency in building modern web 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 a passionate … About the Role The successful candidate will work within a unified codebase that powers both the B2B software platform and its custom AI capabilities. Responsibilities will span the full feature lifecycle, from design (including data structures) to AI integration, enhancing user experiences through advanced Large Language Models. Key Responsibilities Build and maintain web application features using TypeScript, React … and optimize the MySQL database Develop and maintain type-safe RPC endpoints using tRPC and TypeScript to ensure smooth frontend-backend communication Rapidly onboard to a modern TypeScript stack to support high-velocity feature development Required Qualifications Proven experience working in a unified codebase combining application logic and AI/LLM components Strong proficiency in building modern web 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 a passionate … About the Role The successful candidate will work within a unified codebase that powers both the B2B software platform and its custom AI capabilities. Responsibilities will span the full feature lifecycle, from design (including data structures) to AI integration, enhancing user experiences through advanced Large Language Models. Key Responsibilities Build and maintain web application features using TypeScript, React … and optimize the MySQL database Develop and maintain type-safe RPC endpoints using tRPC and TypeScript to ensure smooth frontend-backend communication Rapidly onboard to a modern TypeScript stack to support high-velocity feature development Required Qualifications Proven experience working in a unified codebase combining application logic and AI/LLM components Strong proficiency in building modern web 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 a passionate … About the Role The successful candidate will work within a unified codebase that powers both the B2B software platform and its custom AI capabilities. Responsibilities will span the full feature lifecycle, from design (including data structures) to AI integration, enhancing user experiences through advanced Large Language Models. Key Responsibilities Build and maintain web application features using TypeScript, React … and optimize the MySQL database Develop and maintain type-safe RPC endpoints using tRPC and TypeScript to ensure smooth frontend-backend communication Rapidly onboard to a modern TypeScript stack to support high-velocity feature development Required Qualifications Proven experience working in a unified codebase combining application logic and AI/LLM components Strong proficiency in building modern web 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 a passionate … About the Role The successful candidate will work within a unified codebase that powers both the B2B software platform and its custom AI capabilities. Responsibilities will span the full feature lifecycle, from design (including data structures) to AI integration, enhancing user experiences through advanced Large Language Models. Key Responsibilities Build and maintain web application features using TypeScript, React … and optimize the MySQL database Develop and maintain type-safe RPC endpoints using tRPC and TypeScript to ensure smooth frontend-backend communication Rapidly onboard to a modern TypeScript stack to support high-velocity feature development Required Qualifications Proven experience working in a unified codebase combining application logic and AI/LLM components Strong proficiency in building modern web 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 a passionate … About the Role The successful candidate will work within a unified codebase that powers both the B2B software platform and its custom AI capabilities. Responsibilities will span the full feature lifecycle, from design (including data structures) to AI integration, enhancing user experiences through advanced Large Language Models. Key Responsibilities Build and maintain web application features using TypeScript, React … and optimize the MySQL database Develop and maintain type-safe RPC endpoints using tRPC and TypeScript to ensure smooth frontend-backend communication Rapidly onboard to a modern TypeScript stack to support high-velocity feature development Required Qualifications Proven experience working in a unified codebase combining application logic and AI/LLM components Strong proficiency in building modern web More ❯

Full-Stack Engineer Department: Product Salary: £50,000 - £60,000 (negotiable) Private healthcare Enhanced parental and carers leave Pension contributions L&D support, gym discounts, team socials Equity: Generous EMI share options ️ Holiday: 26 days plus bank holidays Office Policy: Hybrid, must be willing to travel to face-to-face meetings as required ️ Location … play a key role in a startup where every line of code, partner call, or design decision contributes to meaningful outcomes. What You'll Do Build and maintain full-stack feature using React and Node.js Ship secure and maintainable code in regular releases Work closely with design, product, and users Use tools like Copilot and Cursor More ❯

Frontend-Focused Full-Stack Engineer | £80–90k | Hybrid 💸 Strong backing | ESG-Focused FinTech Platform A high-growth FinTech startup is hiring a Frontend-leaning Full-Stack Engineer to join their expanding team, following a recent funding round. Despite operating within the FinTech space, they have a strong focus … on sustainability and ESG, separating them from the rest of the market. 🧰 Tech Stack: TypeScript React Next.js Node.js ✅ What’s on offer: 💰 £80–90k salary 🏙 Hybrid setup: 3 days per week in their Central London office 🚀 Small, fast-growing team where you’ll make a real impact 🌱 Mission-driven product at the intersection of finance and sustainability If … re passionate about building modern, meaningful products and enjoy working across the stack with a frontend focus, I'd love to hear from you. 🚨 Frontend-Focused Full-Stack Engineer | £80–90k | Hybrid More ❯