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Full Stack Engineer - Backend United Kingdom, London Jobs

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Senior Full Stack Engineer
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Join PolyAI as a Senior Full Stack Engineer in London. Develop cutting-edge AI voice assistants using Python, React, and Next.js in a high-ownership role. Enjoy a flexible remote policy, extended holidays, and share options while mentoring a collaborative team.
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United Kingdom , London
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PolyAI
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Senior Full-Stack Software Engineer
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Join our London team as a Senior Full-Stack Engineer. Drive innovation using Go, Python, and React within a product-focused, agile environment. Enjoy a hybrid model, 27 days leave, bonus, and comprehensive benefits while revolutionizing controls management.
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United Kingdom , London
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Citi
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Senior UI Server Full Stack Engineer - Fixed Income Tech
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Join Citi's Fixed Income Tech team in London as a Senior Full Stack Engineer. Design and develop robust, scalable applications using Java 8+, Spring Boot, and message-driven systems. Enjoy a hybrid model, performance bonus, private medical care, and 27 days annual leave.
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United Kingdom , London
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Citi
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Software Engineer, Full Stack - Swaps Platform
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Join our London team as a Full Stack Software Engineer to build the mission-critical Total Return Swaps platform. Utilize Java, Spring Boot, React, and microservices to solve complex problems for hedge funds and traders. We offer competitive compensation, equity, and comprehensive benefits in a h...
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United Kingdom , London
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Clear Street
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Associate Full-Stack Engineer (Front-End Leaning)
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Join Encord in London as an Associate Full-Stack Engineer, with a front-end focus. You will have end-to-end ownership of projects, working across the stack to build reliable, performant software. We offer a competitive package with equity, in a role perfect for a proactive problem-solver ready to...
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United Kingdom , London
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Encord
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Full-Stack Engineer
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Join Encord, a fast-growing AI infrastructure startup in London, as a Full-Stack Engineer. Take end-to-end ownership of projects, working across the entire stack with Python and TypeScript. Enjoy a competitive package, equity, and the chance to solve complex problems at the cutting edge of comput...
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United Kingdom , London
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Encord
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Senior Full-Stack Engineer
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Join a London-based team at the forefront of AI infrastructure. As a Senior Full-Stack Engineer, you will build a complex platform for ML training data, handling multi-modal data (image, video, 3D) with high performance. Take end-to-end ownership using Python, TypeScript, and React in a cutting-e...
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United Kingdom , London
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Encord
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Senior Full-Stack Engineer
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Join a pioneering team in London building the future of AI infrastructure. As a Senior Full-Stack Engineer, you'll tackle immense scale in computer vision, owning projects end-to-end. We seek an experienced engineer who builds reliable, performant systems from scratch. Enjoy a competitive package...
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United Kingdom , London
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Encord
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Senior Full Stack Engineer
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Join a leading consultancy as a Senior Full Stack Engineer in London. You will design and build impactful features using Java, Spring Boot, TypeScript, and React.js. Leverage your Azure and DevSecOps expertise to enhance architecture and performance for real-time pensions and trading systems. Thi...
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United Kingdom , London
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Formula Recruitment
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Full Stack Engineer
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Join a leading nature tech company as a Full Stack Engineer in London. Build a transformative biodiversity platform using React, TypeScript, and Go/Python. Work with microservices, Neo4j, and cloud tech to deliver impactful, end-to-end features. Enjoy competitive benefits, professional growth, an...
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United Kingdom , London
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NatureMetrics
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Frontend-leaning full-stack engineer
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Join a leading European AI startup in London, redefining legal tech. As a frontend-leaning full-stack engineer, you'll craft novel, human-centric UIs with React/TypeScript and work across Python/Postgres. We seek deep frontend expertise, a strong UX sense, and comfort in a fast-paced, high-owners...
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United Kingdom , London
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150000.00 GBP / Year
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Arrows Groupe
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Senior Full Stack Engineer
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Join Team Web as a Senior Full Stack Engineer in London. Shape the future of Intercom's core website using React, Next.js, and AWS. Build robust, full-stack solutions while collaborating with marketing and design teams. Enjoy competitive salary, equity, comprehensive benefits, and a stocked kitchen.
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United Kingdom , London
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Intercom
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Full Stack Engineer
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Lead the architectural evolution of a cutting-edge Data & AI education platform as a Full Stack Engineer. You'll design scalable PostgreSQL schemas, build GCP APIs, and develop sophisticated UIs with Vue.js. This remote UK role offers a chance to mentor junior engineers and own complex features e...
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United Kingdom , Home based, UK (with occasional travel to our London office)
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Cambridge Spark
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Senior Full Stack Engineer
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Join our London team as a Senior Full Stack Engineer. You will own the full engineering lifecycle, designing scalable features for our payments platform. We seek a proactive leader with 5+ years' experience in backend development and cloud platforms. Enjoy a flexible, collaborative culture where ...
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United Kingdom , London
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Sokin
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Senior Full Stack Engineer
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Join an innovative nature-tech leader in London as a Senior Full Stack Engineer. You'll build scalable, cloud-based microservices with Golang/Python and craft user interfaces using React/TypeScript. This hybrid role offers the chance to own impactful features from concept to deployment, transform...
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United Kingdom , London
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100000.00 GBP / Year
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Formula Recruitment
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Senior Software Engineer - Java Full Stack, Futures Engineering
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Lead the development of a Cleared Derivatives back-office system in London. This senior Java Full Stack role requires 7+ years of back-end expertise, financial industry experience, and skills in microservices, Kafka, and Kubernetes. Contribute to ReactJS front-end and enjoy competitive compensati...
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United Kingdom , London
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Clear Street
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Software Engineer - Java Full Stack, Futures Engineering
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Join our Futures Engineering team in London as a Java Full Stack Software Engineer. You will build scalable microservices and event-driven systems with Java, Kafka, and Kubernetes, while contributing to ReactJS front-ends. This role requires 3+ years of Java experience within a financial institut...
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United Kingdom , London
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Clear Street
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Software Engineer (Full Stack)
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Join Brickwise in London to build 'Alice,' a revolutionary AI property manager. As a Full Stack Engineer, you'll use Node.js, React, and TypeScript to ship impactful code across the entire stack. Enjoy a top 10% salary, significant equity, and a vibrant team culture.
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United Kingdom , London
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60000.00 - 80000.00 GBP / Year
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YC Work at a Startup
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Senior Full Stack Engineer
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Join a fast-growing tech company in London as a Senior Full Stack Engineer. You will design scalable applications using Vue.js, PHP, and MySQL, while mentoring a talented team. Enjoy a flexible culture and work on products impacting millions of users daily.
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United Kingdom , London
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Arrive
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Senior Full-Stack Engineer - Physical AI
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Join Encord in London as a Senior Full-Stack Engineer for Physical AI. Build the AI data infrastructure of the future, tackling large-scale data, 3D rendering, and ML models for top robotics firms. Enjoy high autonomy, end-to-end ownership, and a competitive package with equity in a fast-growing,...
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United Kingdom , London
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Not provided
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Encord
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A Full Stack Engineer specializing in backend jobs is a versatile and highly sought-after software professional who possesses expertise across the entire technology stack, with a pronounced depth in server-side logic, databases, and application architecture. This role is central to building the robust, scalable engines that power modern web applications, APIs, and digital services. While proficient in frontend technologies to ensure cohesive integration, their primary focus and value lie in designing, implementing, and optimizing the complex backend systems that handle data, business logic, security, and performance. Professionals in these roles typically shoulder end-to-end responsibility for feature development and system health. Common responsibilities include designing and developing secure, high-performance APIs and microservices; architecting and interacting with both SQL and NoSQL databases; writing clean, maintainable, and tested server-side code; and ensuring system reliability through monitoring, debugging, and participating in on-call rotations. They are deeply involved in the entire software development lifecycle, from concept and design through testing, deployment, and iteration. A critical aspect of the job is collaborating closely with frontend engineers, product managers, and DevOps specialists to translate business requirements into technical solutions, often making key architectural decisions that impact scalability and long-term maintainability. The typical skill set for these backend-focused full stack jobs is comprehensive. Core technical requirements almost always include advanced proficiency in one or more backend programming languages such as Java, Python, C#, or Node.js, alongside frameworks like Spring Boot or Django. Expertise in RESTful API design, cloud platforms (AWS, GCP, Azure), and containerization technologies like Docker and Kubernetes is standard. A strong grasp of database management, data modeling, and caching strategies is essential. On the frontend, practical knowledge of JavaScript, TypeScript, and a modern framework like React, Angular, or Vue.js is necessary for effective integration. Beyond technical prowess, successful candidates demonstrate strong problem-solving abilities, a commitment to software best practices (including Agile methodologies, CI/CD, and code reviews), and excellent collaboration skills. Many positions also seek experience in mentoring junior engineers and advocating for technical excellence. For those seeking dynamic and impactful backend jobs, the Full Stack Engineer path offers the unique advantage of holistic system understanding. It allows professionals to not only build the foundational logic of applications but also to see how it connects to and enables the user experience, making them invaluable assets in any technology-driven organization. This blend of deep backend expertise with complementary frontend skills opens doors to a wide array of opportunities across industries, from startups to large enterprises.

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