Top Front End Developer Jobs in Belfast

Lead frontend team to design and build scalable, performant React-based web applications. Define frontend architecture and standards, mentor developers, ensure code quality, optimize performance, and collaborate with UX, product, and backend teams.

The Senior AI Frontend Engineer will lead the development of AI-driven user interfaces, mentor junior engineers, and design production-grade features for enhancing developer productivity at Citi.

Join the UK engineering team to design, build and maintain the Immersive One frontend. Collaborate with product and QA, write test automation, improve developer experience, resolve incidents, participate in on-call, mentor engineers, and help translate product requirements into robust, scalable frontend solutions.

The Front-End Developer will design and implement web applications, maintain existing features, collaborate with teams, and ensure application performance and security.

Build and maintain responsive, accessible front-end experiences across Anaconda's WordPress web properties. Own front-end architecture, implement pixel-precise React components, optimize Core Web Vitals, create CMS tooling (custom blocks/page builders), collaborate with designers and backend developers, and improve site engagement and conversion.

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.

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

Develop front-end solutions using React, optimize applications, mentor junior team members, and collaborate with cross-functional teams to meet business requirements.

The Lead Front-End Developer will design and develop user interfaces, mentor teams in coding standards, and improve product efficiency through collaboration and feedback in an agile environment.

Build key features for HyperDX focusing on developer experience, engage with contributors, and handle petabyte-scale data efficiently.

The Frontend Software Engineer develops and enhances user interfaces using React and TypeScript, collaborating on architectural decisions and improving system performance.

Build and optimize a responsive Vue.js frontend for a customer-service SaaS, collaborate with product and dev teams, handle production support, participate in Agile ceremonies, perform code reviews, and mentor junior developers.

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 Principal Frontend Engineer will drive Paddle's technical vision, own architectural strategy, mentor engineers, and improve frontend systems' performance and user experience.

Full-Stack Engineer responsible for developing and maintaining front-end and back-end components, collaborating on product solutions, and improving user interfaces.

Full-stack Developers at QuantCo build user interfaces for machine learning solutions, collaborating with data scientists and engineers to deliver actionable products.

You will build features in Angular 2+, architect reusable code, manage project priorities, resolve performance issues, and mentor teammates.

The Staff Software Engineer will lead front-end development, optimize user experiences, mentor engineers, and ensure high-quality, scalable solutions for MZLA's products.

Develop and maintain user interfaces using React and TypeScript, while collaborating with backend and design teams. Contribute to architectural improvements and mentor junior engineers.

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

The Senior Frontend Engineer will build scalable software components, improve SEO, and mentor junior developers while translating business needs into high-performance user experiences.

Design, develop, and maintain front-end applications using Vue and TypeScript, collaborate with teams, and integrate emerging technologies.

The Senior Product Engineer will design and implement features using JavaScript/TypeScript and React, lead projects, and build innovative user experiences for an AI-native CRM.