Senior JavaScript Engineer

Senior Software Engineer

At a Glance

• Senior individual contributor role with real architectural influence, not a feature factory
• TypeScript and Node.js backend, React and frontend... AWS and Terraform throughout
• Hybrid working from Belfast
• £60,000 to £70,000 plus performance bonus
• Permanent

About the Company

Our client is a scaling, product-led technology business building cloud-native platforms at the centre of its global growth strategy. The systems this team builds are not peripheral... they directly underpin revenue, scalability, and long-term product direction. Engineering standards are high, the stack is modern, and senior engineers operate with genuine influence over how the platform evolves.

The Role

This is a senior engineering position for someone who thinks beyond tickets and understands systems. You will join a high-calibre platform engineering team working across the full stack, from TypeScript and Node.js backends through to React and frontends, deployed on AWS with infrastructure managed through Terraform. The expectation at this level is clear: strong fundamentals, clean architecture, and confident decision-making. If you want architectural ownership and the space to shape how a platform scales, this is worth your attention.

Key Responsibilities

• Design and evolve core platform systems with scalability and long-term maintainability in mind
• Deliver full-stack features across TypeScript and Node.js backends and React and frontends
• Architect and deploy cloud-native solutions on AWS
• Define and manage infrastructure through Terraform
• Own CI/CD pipelines and release processes
• Apply test-driven development and strong automated testing principles throughout
• Contribute to architectural decisions and long-term platform direction
• Troubleshoot complex production issues across the stack
• Work closely with product and delivery stakeholders to shape technical solutions from the outset

What You'll Need

Essential:

• 5+ years of commercial software engineering experience at senior level
• Deep experience with JavaScript and TypeScript, particularly in Node.js environments
• Strong frontend capability using React and
• Hands-on AWS experience across application deployment and infrastructure
• Experience with Infrastructure as Code, ideally Terraform
• Strong database fundamentals across relational and NoSQL stores such as PostgreSQL or DynamoDB
• Proven experience within modern CI/CD environments
• Clear understanding of scalable system design and cloud-native architecture

Nice to have:

• Experience writing backends in Rust
• Exposure to AI-powered developer tooling or agentic workflows
• Background in platform engineering, SaaS, or product-led businesses

Why Apply?

• £60,000 to £70,000 base salary plus performance-based bonus
• Hybrid working from Belfast
• Senior-level ownership without heavy management layers
• Real architectural influence over a platform central to global product delivery
• Modern, disciplined tech stack with genuine engineering standards
• Clear pathway toward Lead or Principal progression

Next Steps

To discuss in confidence, connect with Ryan Quinn on LinkedIn or reach out directly at .

Clean and ready to post. One thing worth adding if you have it: the interview process.

Skills:
React TypeScript AWS

Benefits:
Bonus

WHJS1_NI