Top Front End Developer Jobs in Belfast

Build and maintain production-grade React and TypeScript applications for financial workflows on the Canton Network. Design reusable component libraries and scalable frontend architectures, optimize performance and accessibility, integrate with backend services, and uphold quality through testing and CI/CD. Collaborate with product and design teams, contribute to technical decisions, review code, mentor teammates, and help deliver intuitive interfaces for asset tokenization, collateral management, credentials, and related financial applications.

Designs and leads frontend architecture for real-time, conversational web experiences. Develops reusable components, responsive interfaces, APIs, testing, observability, accessibility, and secure applications. Partners with Product, UX, backend, and ML teams; leads initiatives from design through production; troubleshoots complex issues; conducts reviews; mentors engineers; and establishes standards for performance, reliability, scalability, and maintainability.

Build production React and TypeScript interfaces for a next-generation transportation dispatch platform. Responsibilities include creating accessible, responsive data-heavy UIs, integrating REST/OData APIs, implementing real-time maps and drag-and-drop planning, optimizing data grids, and delivering tested software weekly using Playwright and axe-core. The role involves modernizing a legacy desktop application and collaborating closely with a small engineering pod while using AI-assisted development tools.

Build and own production React screens for a browser-based transportation dispatch platform. Responsibilities include integrating OData and CloudHub services, managing Redux state, creating data-heavy accessible interfaces, implementing maps and drag-and-drop workflows, writing Playwright and axe-core tests, optimizing performance, and shipping tested functionality weekly. The role also involves backend service enhancements, CI/CD practices, pair-squad collaboration, and AI-assisted development.

Develop and maintain modern frontend applications, backend services, APIs, data models, dashboards, and analytics experiences. Collaborate with product, UX, backend, data, AI/ML, DevOps, and platform teams to deliver reliable customer-facing products. Responsibilities include integrating AI/ML capabilities, processing data, optimizing performance, maintaining data quality, writing tested code, troubleshooting services, and supporting deployment and observability.

Build and maintain performant, secure frontend features for repository management using Vue.js and GraphQL. Collaborate across product, design, and backend teams, improve reliability and observability, write tests, participate in on-call and incident response, and apply AI tools responsibly to accelerate development while ensuring quality and safety.

Build core web experiences across Chat, Notes, Calendar, Docs, and Sheets. Develop interactive features such as real-time messaging, collaborative editing, rich-text editing, scheduling, tables, and spreadsheets. Create reusable frontend architecture, integrate streaming AI capabilities, and ensure performance, reliability, responsiveness, and accessibility. Collaborate with product, design, backend, and AI engineering teams while independently owning features from technical design through production.

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 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.

Develop and maintain React-based user interfaces and Java backend services. Write clean, tested code, debug issues, participate in code reviews, collaborate with designers and stakeholders, and assist with database queries while following best practices.

Build modern frontend applications for an AI-driven insurance platform. Responsibilities include creating multi-step quote forms with validation, quote results and comparison pages, and fast, SEO-friendly marketing pages. The role requires strong React experience, ideally with Next.js, accessibility awareness, and experience delivering serious products. Nice-to-haves include e-commerce or marketplace experience, design systems, regulated industries, and web analytics.

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.

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.

Build and own marketing-focused web projects, including landing pages, campaign pages, and website updates. Ship production-quality front-end code, improve technical SEO, and ensure performance, accessibility, UX, and UI quality. Partner with Marketing, designers, developers, and external agencies to scope, coordinate, and deliver projects. Work primarily with Angular 13 while adopting modern frameworks and AI-assisted coding practices.

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.

The Senior Front-End Engineer will modernize and build front-end projects at Pitchup, utilizing Nuxt.js and Vue.js, while enhancing UI/UX and improving development practices.

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

Looking for a Senior Front-End Developer with extensive Vue.js experience to enhance the Jibble 2.0 platform, collaborating closely with product teams.

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.

The Software Engineer will design and maintain payment processing systems, mentor other engineers, and ensure security in client transactions within the crypto ecosystem.

Senior full-stack engineer building high-performance trading systems in TypeScript and Rust. Develop real-time, data-dense React UIs with reactive state management, design distributed systems (REST, WebSockets, TCP/UDP), own end-to-end lifecycle, ensure observability and reliability, mentor peers, and support production incidents.

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.

Develop server-side applications using Kotlin and Java, collaborate with teams to enhance Atlassian plugins, and ensure code quality through testing and reviews.