16 Nov 2025 BBBH61331 Senior/Principal Typescript Developer Up to £80000.00 per annum Belfast

Northern Ireland Water Limited; Belfast; On-site; GBP 68,000 - 80,000; Full time

Job summary

A leading FinTech company is seeking Senior and Principal Typescript Developers to join their expanding Belfast operations. In this role, you will lead the delivery of complex features, influence architectural decisions, and build scalable systems. Ideal candidates will have strong full-stack engineering skills with TypeScript and modern JavaScript. This position offers a competitive salary of up to £80,000 depending on experience.

Qualifications

• 5+ years' experience in software development.
• Proficient in automated testing and cloud-native engineering.
• Strong communicator with collaborative approach.

Responsibilities

• Lead end-to-end delivery of complex features.
• Make architectural decisions and mentor engineers.
• Promote clean code and automated testing.

Skills

Full-stack engineering with TypeScript

React

GraphQL

Modern JavaScript

Event-driven systems

Agile SDLC

SQL

Tools

AWS

CI/CD

Terraform

Job description

MCS Group is looking for Senior and Principal Typescript Developers to join a global FinTech leader that is rapidly expanding its Belfast operations. In this role, you'll help shape the future of our client's platforms. You'll influence architecture, elevate engineering practices, and build scalable systems used worldwide. This is an exciting time to get on board with this company as they look to build out a world‑class engineering hub in Belfast.

Key Responsibilities

• Lead end‑to‑end delivery of complex features and services.
• Make key architectural decisions and mentor other engineers.
• Turn business requirements into robust, scalable solutions.
• Promote clean code, automated testing, and cloud‑native engineering.
• Collaborate with product, architecture, and platform teams.
• Drive innovation and contribute to long‑term technical strategy.

The Ideal Person

• Strong full‑stack engineering with TypeScript, React, GraphQL, and modern JavaScript.
• Backend experience with SQL, REST, microservices, and event‑driven systems (RabbitMQ/SOLACE/AMQP).
• Proficient with AWS, CI/CD, and Terraform, with strong automated testing practices.
• Solid understanding of Agile SDLC, SOLID principles, and building production‑grade, low‑latency systems.
• Skilled communicator with 5+ years' experience and a proactive, collaborative approach.

Salary - Up to £80,000, DOE

To speak in absolute confidence about this opportunity, please send an up‑to‑date CV via the link provided, or contact Matthew Hamill, IT Recruitment Consultant, at MCS Group.

Even if this position is not right for you, we may have others that are. Please visit MCS Group to view a wide selection of our current and exclusive roles www.mcsgroup.jobs

All conversations will be treated in the strictest of confidence.

MCS Group is committed to Equality, Diversity, and Inclusion for all, being the first recruitment agency in NI to achieve Bronze Diversity Mark accreditation. If you have a disability that requires a reasonable adjustment to be considered at any stage of the recruitment process, please contact us and we will endeavour to facilitate the request.