Frontend Javascript Developer jobs in Belfast

Citigroup

We are looking for a Java Technical Lead with proven experience building robust, high-performance, large scale Capital Markets applications. Team Background The Derivatives Credit Risk Technology Team is responsible for delivering Counterparty Credit Risk Management software solutions to Citi’s Risk

Job Req Id 26953051 Location(s) Belfast, Northern Ireland, United Kingdom Job Type On-Site/Resident Posted May. 06, 2026 Discover your future at Citi Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Cit

Ubiq

Fully remote UK Reporting into Chief Product Officer What does this role achieve? At UBIQ we are always daring to be different, and that doesn’t stop at our creative work! Our Experience team is dynamic, fun, and energetic, and we’re always striving to provide an outstanding client experience. A foc

Ocho

UI Engineer About our client Our client is a global leader in financial technology, building secure, scalable, and high-performing systems that power critical business operations worldwide. With a strong focus on innovation and collaboration, they are now seeking a UI Engineer to join their Corporat

Techaxis, Inc

Frontend Developer specializing in Next.js, you will be responsible for building fast, SEOfriendly, and highly performant web applications using React, TypeScript, and modern renderingstrategies. You will work closely with UI/UX designers, backend teams, and architecture groups to deliver responsive

Corporate Travel Management (CTM) UK/EU

You'll be a senior developer on our in-house travel management platform, working across the full stack — from React frontends to Node.js APIs and background processing services that handle live travel data. The platform spans Linux and Windows environments, including containerised services running o

BGC Group

Role Summary We are looking for a UI Developer to join our Fenics Data and Analytics team. This role offers an excellent opportunity to learn and grow while contributing to the development of modern, high-performance user interfaces for real-time data and analytics systems. You will work closely wit

TrueNorth®

TrueNorth are working with a successful tech consultancy who work heavily in the public sector - we're looking for Front End Developers for some immediate contract roles. Key skills: JavaScript TypeScript Node Nunjucks TDD Ruby (Nice to have) APIs (Nice to have) The roles are inside IR35 and have a

TALENT INTERNATIONAL UK LTD

Job Description: Senior Frontend Developer - SAP Commerce Cloud - London / Hybrid Salary - up to £60,000 Experience - 5+ years Location - central London, 2 days a week Tech - SAP Commerce Cloud Accelerator, JavaScript, TypeScript, React.js, HTML, CSS We are looking for a frontend developer to join a

Hired

Role: JavaScript Developer Location: Remote Employment Type: Full-time Compensation: Competitive salary commensurate with experience, qualifications, and location. Indicative range: $90,000 – $150,000 (USD equivalent), plus benefits. Role Overview We are hiring a JavaScript Developer to build and sh

Modo Energy

At Modo Energy we’re building an AI-native platform for energy markets — combining LLM agents and real-time market data to create an AI analyst that can reason about complex energy systems. Our frontend is where massive datasets, predictive models, and AI systems become usable. The stack is TypeScri

Anson McCade

We're partnering with a cutting-edge tech company building a platform that helps enterprises optimise energy, monitor assets, and unlock real-time insights from IoT data.The Role:You'll build high-performance web applications and intuitive dashboards, turning complex data into clear, user-friendly i

KBC Technologies Group

Develop, enhance, and maintain COBOL programs (Batch & Online) on \"OpenVMS\" Analyze business requirements and translate them into technical solutions Perform code modifications, enhancements, and bug fixes Ensure compliance with coding standards and best practices

Citibank (Switzerland) AG

Citibank (Switzerland) AG in Belfast is looking for Technology Developers at various levels to contribute to application systems development. The role involves working with technologies like Core Java, Javascript REACT, SQL, and Angular. Employees enjoy a hybrid working model, competitive salary, an

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Version 1

Responsibilities Build and maintain integrated productivity metrics dashboards for AI tools Monitor AI tool usage and adoption across the organisation Create and deliver automated DPO (Developer Productivity Office) data feeds Analyse productivity trends and surface insights to support business deci

Job Description Junior AI Developer Programme – Job Support Included Complete online training designed to help you enter junior AI and developer roles. Study part-time, build coding and AI fundamentals, and receive structured job support to help you secure your first role. The Programme This 1

DevOps EngineerLocation: Belfast (On site) About StormHarvesterStormHarvester helps wastewater utilities predict and prevent issues like flooding and pollution before they happen, protecting communities and reducing costs. We are the market leader in this space. At its core, StormHarvester's advance

Citi

We are seeking a talented and passionate Lead Frontend Developer with deep expertise in ReactJS to spearhead the development of our cutting‐edge user interfaces. The ideal candidate will be a technical leader, responsible for guiding the frontend team, defining architectural patterns, and ensuring t

VANRATH

Senior Back-end TypeScript Engineer Remote anywhere where in Northern Ireland About your next employer: This innovative company is redefining cutting-edge digital solutions. As a small, passionate, and technology-driven organisation based in Northern Ireland, it collaborates with some of the world's