Frontend Developer ( Principal )

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 £80k
• Work on AI-driven video forensic tools used by law enforcement and security organisations

About the Company

Our client is a 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 £80k 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 directly at ryan@ochopeople.com.