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Senior Software Engineer, Front-End or Full Stack United Kingdom 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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Full Stack Engineer
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Join Hertility's mission in women's health as a Full Stack Engineer. Utilize your TypeScript, React, and GraphQL skills to build seamless web and mobile experiences. Enjoy a remote-first UK role with flexible hours, generous leave, and wellbeing benefits in a collaborative, growth-focused environ...
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United Kingdom
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50000.00 - 55000.00 GBP / Year
Hertility
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Senior Full Stack Java Developer
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Join a leading OTC derivatives technology team in Belfast, driving a major tech transformation. As a Senior Full Stack Java Developer, you will build robust solutions using Java, Spring, and Angular. We seek an engineer passionate about TDD, clean code, and distributed systems like AWS or Kafka.
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United Kingdom , Belfast
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Citi
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Lead Full Stack Java Developer
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Lead Full Stack Java Developer role in Belfast. Drive tech transformation for OTC derivatives, using Java, microservices, and cloud platforms. Lead a team, architect solutions, and foster a strong engineering culture in a global investment bank.
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United Kingdom , Belfast
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Citi
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Java Full Stack Developer
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Seeking a Senior Java Full Stack Developer in Belfast. Design and develop enterprise applications using Java, Spring, and Angular/React. Enjoy extensive benefits including bonus, private healthcare, and 27 days leave. Lead high-impact projects in a collaborative tech environment.
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United Kingdom , Belfast
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Citi
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Java Full Stack Developer
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Join our Belfast team as a Senior Java Full Stack Developer. You will design and enhance a critical enterprise-wide client data system using Java, Spring, and Angular/React. This role offers a performance bonus, private medical care, and 27 days annual leave. Apply your expertise to lead innovati...
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United Kingdom , Belfast
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Citi
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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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Java/ Full Stack Developer
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Join our Belfast team as a Java/Full Stack Developer. You will build scalable enterprise applications using Java, Spring, and modern front-end frameworks like Angular/React. This role offers a competitive package including bonus, private healthcare, and 27 days annual leave, while contributing to...
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United Kingdom , Belfast
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Citi
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Full Stack Developer
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Join our team in Belfast as a Full Stack Developer. You will design and build robust applications using Java, Spring Boot, and modern CI/CD tools like Tekton on OpenShift. This role focuses on DevOps automation and enhancing the developer experience within an agile environment. We offer a competi...
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United Kingdom , Belfast
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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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Senior Full Stack Developer
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Join our Manchester-based Tech team as a Senior Full Stack Developer. You will build and optimize Shopify e-commerce platforms using your expertise in Liquid, Node.js, JavaScript, and AWS Lambda. Enjoy a collaborative culture, flexible hours, a 40% staff discount, and comprehensive benefits. Leve...
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United Kingdom , Manchester
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Club L London
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Full Stack Developer - C#
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Join Clue in Bristol as a Full Stack C# Developer. Use .NET 8, Azure, and modern front-end frameworks like Angular or React to build innovative, AI-enhanced software. Thrive in an agile team with benefits like share options, private healthcare, and flexible working. Leverage tools like GitHub Cop...
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United Kingdom , Bristol
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Clue Software
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Senior Full Stack Engineer
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Join Dexory as a Senior Full Stack Engineer in Wallingford. Design and build customer-facing systems and robot fleet controls using React, TypeScript, Ruby on Rails, and PostgreSQL. Enjoy impactful work with full ownership, private healthcare, pension, and 25 days holiday.
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United Kingdom , Wallingford
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Dexory Using
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Full-Stack Engineer
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Join our innovative team as a Full-Stack Engineer in the UK. You will build and scale our cutting-edge voice platform, used by millions, with expertise in Python and backend development. Enhance products, integrate solutions, and ensure performance and security. Enjoy a culture of growth, learnin...
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United Kingdom
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ElevenLabs
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Full-Stack Engineer
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Join our team as a Full-Stack Engineer in the UK. Develop cutting-edge voice AI products using Python and TypeScript/React. Build end-to-end features, shape product direction, and collaborate across teams. Enjoy professional development stipends, company offsites, and flexible co-working support.
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United Kingdom
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ElevenLabs
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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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