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Senior Software Engineer, Front-End or Full Stack United Kingdom, London Jobs

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Full Stack Developer
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Join a renowned UK charity in London as a Full Stack Developer. You will support a key project, developing an in-house tool using .Net Core, C#, and Entity Framework. This role requires strong API integration skills and excellent communication to gather business requirements. Help partner organiz...
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United Kingdom , London
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Understanding Recruitment NFP
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Senior Full Stack Developer
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Lead the discovery and re-platforming strategy for a data analytics firm in London. As the primary technical owner, you'll assess legacy PHP/WordPress systems and define a modern, cloud-native architecture using React and JavaScript. Your work will consolidate platforms to enhance scalability and...
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United Kingdom , London
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600.00 - 700.00 GBP / Hour
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Data Idols
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Full Stack Engineer, AI Experience
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Join Miro's AI Experience team in London as a Full Stack Engineer. Shape the future of collaboration for 90M+ users by building AI-powered features like intelligent assistants. Leverage your 6+ years with React, Java/Kotlin, and AI frameworks. Enjoy equity, health insurance, pension, and great be...
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United Kingdom , London
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Miro
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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 Full Stack Java Developer
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Join Citi's FX Data Analytics & AI team in London as a Senior Full Stack Java Developer. Engineer robust, scalable data pipelines using Java, Spark, and cloud-native technologies within a dynamic trading environment. This role offers a competitive package including bonus, private medical care, an...
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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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Backend-leaning Full-stack Engineer
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Join a high-growth AI startup in London as a Backend-leaning Full-stack Engineer. Build scalable backend infrastructure and data pipelines from scratch using Python and PostgreSQL. Enjoy greenfield product work, equity, and full visa sponsorship with relocation support.
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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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Web Developer - Full Stack
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Join a fast-growing Ecommerce brand as a Full Stack Web Developer. This mainly remote role requires Shopify app development expertise with HTML, CSS, JavaScript, and API integration. Leverage your skills in a dynamic team, with a salary up to £50k + benefits and occasional London visits.
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United Kingdom , London
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50000.00 GBP / Year
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Blu Digital
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Senior Web Developer - Full Stack
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Join a leading entertainment group in London as a Senior Full Stack Web Developer. You will build web applications using Ruby, React, HTML, JSS, and JavaScript within an Agile environment. This is a key role for an experienced developer seeking a new challenge with a competitive benefits package.
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United Kingdom , London
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60000.00 GBP / Year
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Blu Digital
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Web Developer - Full-Stack
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Join a leading entertainment group in London as a Full-Stack Web Developer. You will build web applications using Ruby, React, HTML, JSS, and JavaScript. The role requires experience with Agile methodologies and offers a comprehensive benefits package.
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United Kingdom , London
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50000.00 GBP / Year
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Blu Digital
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Explore senior-level opportunities in cutting-edge technology with our curated list of Senior Software Engineer, Front-End or Full Stack jobs. These roles represent the pinnacle of web and application development, where seasoned professionals architect, build, and maintain the sophisticated digital products that power modern businesses and user experiences. Senior engineers in these domains are technical leaders, responsible for the entire software development lifecycle, from conceptualization and design to deployment, optimization, and ongoing iteration. They bridge the gap between complex business requirements and elegant technical solutions, ensuring systems are scalable, maintainable, and deliver exceptional user value. A Senior Front-End Engineer specializes in crafting the client-side layer that users directly interact with. Their core mission is to build intuitive, responsive, and high-performance user interfaces. Typical responsibilities include translating design mockups into functional, accessible code using frameworks like React, Angular, or Vue.js; optimizing applications for maximum speed and scalability; ensuring cross-browser compatibility; and implementing robust state management. They are deeply proficient in JavaScript/TypeScript, HTML, CSS, and modern build tools, with a keen eye for UX/UI principles and front-end performance metrics. A Senior Full Stack Engineer possesses mastery across both the front-end and back-end spectrum. They design and develop complete applications, handling everything from user-facing components to server-side logic, databases, and APIs. Common duties involve architecting overall system design, developing RESTful or GraphQL APIs, designing data models, writing server-side code in languages like Node.js, Python, or Java, and integrating with various data storage solutions. They ensure the seamless flow of data and functionality between the client and server, making critical decisions on technology stacks and infrastructure considerations. Typical skills and requirements for these senior roles extend beyond pure coding. Employers seek professionals with 5+ years of experience demonstrating a proven track record of shipping complex products. Expertise in modern frameworks and languages is a given, but equal emphasis is placed on software architecture, system design, and the ability to make long-term technical decisions. Strong collaboration skills are essential, as these engineers frequently work with product managers, designers, and other stakeholders to define requirements and translate them into technical specs. Leadership qualities such as mentoring junior developers, conducting code reviews, advocating for best practices, and driving technical excellence within a team are hallmarks of the position. A proactive problem-solving mindset, the ability to work in ambiguous environments, and a product-focused obsession with quality, performance, and user experience are the defining traits of successful candidates. Discover your next career-defining challenge by browsing our comprehensive selection of Senior Software Engineer, Front-End or Full Stack jobs today.

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