Senior Node.js Developer (Full Stack)

Senior Engineer (Full Stack)

Belfast | Hybrid | Full-Time

At a Glance

Location: Belfast (Hybrid)

Employment Type: Full-Time, Permanent

Seniority: Senior Engineer

Core Stack: TypeScript, React, Node.js, AWS

Key Requirement: 5+ years full stack TypeScript experience essential

Who You'll Work For

Our client is a large, globally operating financial services business with a significant and growing technology function. Their Belfast team is part of a wider engineering organisation, currently engaged in a major next-generation platform build using the latest cloud-native architecture and technology.

This is a rare opportunity to join a greenfield platform team, working with modern tooling at scale, in a business where engineering is central to the product.

What You'll Be Doing

As a Senior Full Stack Engineer, you will take ownership of the design, development, testing, and deployment of software across the team. You will work closely with Principal Engineers, Architects, and Leads to deliver into production environments, while helping to raise the bar for the engineers around you.

Drive engineering improvements and communicate the principles behind your decisions to the wider team

Take ownership of assigned work end-to-end, from design through to production deployment

Support a well-defined SDLC covering planning, prioritisation, and delivery

Lead estimation conversations, challenge requirements, and foster solutions

Contribute to wider system architecture discussions with Engineers and Leads

Evolve systems toward target state architecture through refactoring and prioritisation

Collaborate with BAs and Product Owners to navigate ambiguity and refine requirements

Mentor junior engineers and contribute to a culture of continuous improvement

Your Impact

You will be a core contributor on a platform that is used continuously by multiple teams across a global organisation. The work you deliver will be production-grade, high-availability software in a low-latency, event-driven environment. Your technical decisions and mentorship will directly shape both the platform and the team around you.

What We're Looking For

Essential

5+ years of demonstrable full stack or front/back-end engineering experience in TypeScript in a professional environment

Front-end: proficiency in HTML5, CSS3, React, Redux, and React Query

Back-end: proficiency in TypeScript and/or another OOP language (C# or Java); strong SQL and NoSQL database knowledge

Experience with RESTful APIs, GraphQL, and WebSockets

Experience with AWS services, including Lambda, Fargate, API Gateway, and AppSync

Experience with Terraform for infrastructure management

Familiarity with microservices architecture and containerisation

Experience with Pub/Sub patterns and messaging technologies such as SOLACE or AMQP

Strong grounding in automated testing across unit, integration, and end-to-end levels

Experience working within Agile, cross-functional delivery teams using tools such as JIRA

CI/CD experience within an enterprise environment

Proficiency with Git-based source control and Linux shell or Windows PowerShell

Strong analytical and problem-solving skills, with excellent attention to detail

Desirable

Demonstrable experience with C# (.NET 8+) in a professional environment

Knowledge of OOP and SOLID design principles

Contribution to open-source projects

Experience on regulatory-driven projects

Knowledge of financial markets, systems, and OTC products

What's In It For You

A greenfield platform build using the latest cloud-native architecture and tooling

The opportunity to work alongside experienced engineers in a high-calibre team

A hybrid working model based in Belfast

Genuine ownership of your work, from design through to production

A collaborative, inclusive culture within a large, globally recognised organisation

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

Benefits:
Pension Fund Medical Aid / Health Care

WHJS1_NI