Senior Frontend Engineer - React / TypeScript Belfast | Hybrid
- Senior-level frontend engineering role at a fast-growing tech scaleup
- React, TypeScript, tRPC, Next.js and AWS on mission-critical software
- Hybrid working with Belfast base
- Salary up to £85k
- Work on AI-driven video forensic tools used by law enforcement and security organisations
About the Company
Our client is an advanced body camera and cloud software scaleup operating at the intersection of AI, video intelligence and public safety. Their platforms are trusted by some of the biggest names in security, services and law enforcement processing and analysing large-scale media and evidence data in real time. It's a high-growth environment with a strong "one team" culture built on openness, collaboration and genuine impact.
The Role
This is a hands-on Senior Frontend Engineering position within a team building next-generation AI-driven video forensic and evidence analysis tooling. You'll take real ownership of the user experience behind complex investigative workflows video review, transcription, timeline analysis, streaming and AI-assisted insights. Working closely with backend engineers, product and design, you'll deliver performant, maintainable React applications that power mission-critical workflows at scale.
Key Responsibilities
- Build and maintain React applications using TypeScript, Tanstack Router/Query and Shadcn UI
- Design and implement type-safe APIs with tRPC across frontend and backend
- Develop AWS Lambda functions and manage infrastructure using AWS CDK
- Work across React (Vite) and Next.js monorepos with Turbo and pnpm
- Write robust test coverage using Vitest and Playwright
- Optimise performance across bundle sizes, Core Web Vitals and query caching
- Review code and uphold strict TypeScript standards and security best practices
- Collaborate with product and design to take features from requirements through to production
What You'll Need
Essential:
- 5+ years of professional TypeScript / JavaScript development
- Expert-level React with modern patterns across SPA applications
- Strong experience with modern build tools (Vite, Turbo, webpack) and monorepo management
- A pragmatic approach - you understand the trade-offs between abstraction and clarity
Nice to Have:
- Experience with tRPC and the Tanstack ecosystem (Query, Router, Table)
- AWS CDK, Tailwind CSS, Shadcn/Radix components
- Zod validation and Playwright E2E testing
- React Native exposure
Why Apply?
- Salary up to £85k depending on experience
- Hybrid working with a Belfast city centre base
- Private health insurance and pension matching scheme
- Generous annual leave allowance
- Learning and development opportunities with real investment in your growth
- Cycle to work and Home & Tech schemes via salary sacrifice
- High-trust environment with significant responsibility and real career progression
Interested?
For more information or to submit your CV, connect with Ryan Quinn on LinkedIn or reach out via the link below.