Top Front End Developer Jobs in Belfast

Lead front-end engineer on the Mapper Team building scalable data-visualization and real-time multi-user front-end features. Own end-to-end projects, contribute to architecture and processes, mentor peers, participate in hiring, and deliver high-performance, testable, maintainable UI code.

Build and maintain React/Next.js TypeScript frontend applications powering checkout, payments and policy renewal flows. Translate designs into responsive interfaces, integrate with APIs and payment providers, optimize performance, implement transactional workflows, and contribute to reusable frontend architecture and engineering best practices.

Build responsive, high-performance frontend applications using React, Next.js and TypeScript; translate UX designs into scalable component-based interfaces; integrate with backend APIs and workflow engines; optimise performance, maintain reusable components, participate in code reviews, and collaborate with product, design and backend teams to deliver AI-enabled workflow automation features.

Build fast, scalable React/Next.js frontend applications for customer-facing and internal AI-powered insurance workflows. Translate UX requirements into responsive interfaces, integrate with backend APIs and AI services, optimize performance, create reusable components, participate in code reviews, and collaborate with product, design, backend engineers and QA to shape frontend architecture and technical decisions.

Design and implement frontend applications using JS, CSS, React, and Flutter. Collaborate on technical specs and contribute to documentation, ensuring user experience and performance.

Design and build user interfaces using React and TypeScript, collaborate with architects, product and UX, follow Agile practices, produce reusable UI components, mentor teammates, and contribute to coding standards, architecture, and CI to continuously improve products.

Hands-on engineering leader owning the frontend team for a low-latency trading platform. Build and review TypeScript and Rust code, set architecture and standards, deliver real-time trading interfaces, ensure operational readiness and incident ownership, and mentor and grow engineers while shaping product roadmap with senior stakeholders.

Develop mobile-first, responsive Vue.js frontends focused on performance and UX. Build frontend management systems, participate in code reviews and team ceremonies, mentor junior engineers, and collaborate with backend teams.

Design, build, and maintain enterprise-scale Angular front-end applications. Collaborate with UX, product, and backend teams to integrate REST APIs, develop reusable components, optimize performance, implement testing (unit, integration, e2e), and support CI/CD and containerized deployments.

Design and implement developer-facing UI from Figma to production using Hotwire (Turbo + Stimulus) and ViewComponents. Own the dashboard, API playgrounds, docs, marketing site, and data visualization. Optimize performance and bundle size, maintain a coherent component system, and ship polished, production-ready front-end with tests and CI/CD.

As a Senior Frontend Engineer, you'll deliver web-based AI modeling tools, optimize frontend architecture, and collaborate on complex UI components.

As a Senior Frontend Engineer, you'll design and deliver React/TypeScript components, optimize performance, and lead frontend architecture for complex web apps.

As a Senior Frontend Engineer, you'll lead the development of web apps using React and TypeScript, creating intuitive, data-driven UIs, while implementing best practices and performance optimization.

As a Senior Frontend Engineer, you'll create production-ready web components using React and TypeScript, optimize performance, and collaborate with teams to deliver complex UIs for AI applications.

The Frontend Engineer will implement UI features, automate UI testing, and oversee production releases while focusing on user experience in the blockchain space.

The role involves developing high-quality Vue.js applications, creating interactions, collaborating with back-end engineers, and writing tests.

Owner of the asset discovery experience across tokens, perpetuals, and prediction markets. Design, build, and scale features for web, mobile, and browser extension platforms. Lead initiatives to add blockchain support and new products, interface with users and developers for feedback, and help grow and hire a high-performing Discovery team.

Build and ship full-stack features for North, develop autonomous agents that access sensitive enterprise data, productionize state-of-the-art models, write minimal, secure low-resource code, and collaborate with researchers to deploy performant RAG/agentic applications while prioritizing security and user experience.

Own and deliver frontend trading features across web, mobile, and browser extension platforms. Lead new blockchain integrations and product initiatives, collaborate with product, design and trading teams, interface with users and developers, and help grow the engineering team and culture.

Build and maintain fast, intuitive frontend applications for blockchain and Web3 products. Collaborate with product, design, and engineering teams; develop reusable components and frontend architecture; integrate wallets and smart-contract interactions; improve performance, reliability, and accessibility; participate in technical planning and code reviews; mentor other developers and establish frontend best practices.

As a Senior Frontend Engineer, you will develop intuitive, high-performance interfaces for real-time conversational AI experiences.

The Sr. Software Engineer (FE) will lead the development of scalable frontend applications using React. Responsibilities include systems design, testing strategy, performance optimization, AI integration, and mentoring.

The Senior Software Engineer will develop features for Phantom's web platforms, lead new product initiatives, interface with users, and contribute to team culture.

Design and develop scalable, secure frontend web applications for connected embedded systems. Lead frontend architecture, collaborate with backend/embedded teams, implement device provisioning, telemetry visualization, and remote management UIs. Optimize performance, accessibility, and maintainability; mentor engineers, participate in reviews, and drive frontend best practices.

As a Senior Frontend Engineer, you'll design and develop web and mobile applications, mentor juniors, and enhance coding practices while collaborating closely with the engineering team.