Senior Node.js Developer

Senior TypeScript Engineer Belfast | 3 Days Onsite At a Glance Senior-level full stack, frontend, or backend TypeScript engineer (5+ years) React, Node.js, AWS serverless stack 3 days onsite in Belfast Building the unified platform that powers a major global financial institution's core broker revenue Who You'll Work For One of the world's largest financial market infrastructure businesses, this group is the leading interdealer broker globally by revenue and the number one Energy & Commodities broker in the world. Operating across 60+ offices in 27 countries with over 5,300 people, they're at the forefront of how global financial markets connect, price, and trade. What You'll Be Doing The Fusion Platform is one of this organisation's most strategically important applications a major revenue-generating system consolidating multiple broker applications into a single, unified platform. This is a new team role and the team is open to strong full stack TypeScript engineers as well as frontend or backend specialists who have solid exposure across both layers. Built in direct partnership with AWS, this is a genuinely greenfield engineering challenge: modern architecture, a highly technical (and deliberately lean) team, and full ownership from design through to production on a platform used 24/5 by trading desks globally. Due to the complexity of the work and the collaborative nature of the team, 3 days onsite in Belfast is required. Your Impact Drive engineering improvements and communicate the principles behind your decisions to the broader team Champion a well-defined SDLC, supporting planning, prioritisation, and delivery across the team Lead estimation conversations by challenging requirements, drawing on experience, and fostering solutions Shape system architecture discussions and help evolve services toward target-state design through refactoring Take end-to-end ownership of features design, development, testing, and production deployment Collaborate closely with Principal Engineers, Architects, and Leads to ensure successful releases Support and mentor junior engineers, fostering a culture of continuous improvement What We're Looking For Essential 5+ years of professional engineering experience in TypeScript (full stack, frontend, or backend) Front-end: proficient in React, Redux, React Query, HTML5, CSS3, and Tailwind Back-end: strong TypeScript (and/or C#/Java), RESTful APIs, GraphQL, WebSockets Solid database knowledge across SQL and NoSQL Experience with AWS services (Lambda, Fargate, API Gateway, AppSync) and Terraform Microservices architecture and containerisation experience Pub/Sub and messaging patterns (e.g. SOLACE/AMQP) CI/CD in enterprise environments; automated unit, integration, and e2e testing Agile delivery team experience with tools like JIRA Able to commit to 3 days onsite in Belfast Desirable OOP/SOLID principles and demonstrable C# (.NET 8+) experience Contribution to open-source projects Knowledge of financial markets or OTC products What's In It For You Up to £60,000 base salary Hybrid working 3 days onsite in Belfast Work directly alongside AWS engineers on a flagship platform build Highly technical, small-team environment with genuine ownership and scope Inclusive culture with active employee networks and development pathways Greenfield platform build something new, not maintain something old Interested? If you're interested or have any further questions on the role, please feel free to reach out to Eve Geddis directly on LinkedIn.

Skills: Typescript React AWS Serverless CICD Microservices Full Stack Benefits: Pension Fund Medical Aid / Health Care WHJS1_NI