Principal React Engineer
The Opportunity
We're partnering with a highly regarded technology organisation delivering enterprise-scale digital platforms used by some of the world's leading brands.
They are now seeking a Principal React Engineer to play a key role in modernising and evolving their front-end architecture as part of a major multi-year transformation programme.
In this role, you will act as the technical leader in the React space – shaping front-end architecture, improving performance, introducing best-practice engineering standards, and contributing significantly to shared codebases. You'll collaborate closely with product, UX, backend engineering, and data teams to deliver seamless, scalable, customer-facing applications used globally.
This is an opportunity to influence technical direction, set standards, and mentor others, while remaining deeply hands-on in building world-class front-end solutions.
Key Responsibilities
Front-End Engineering & Architecture (80%)
- Design and evolve front-end architecture for complex, distributed systems.
* Ensure UI/UX designs are technically feasible, performant, and accessible.
* Implement information architecture and interaction design aligned with backend specifications.
* Develop new user-facing features using modern, component-driven development.
* Build and maintain internal design systems and reusable component libraries.
* Write clean, test-driven, production-quality React and TypeScript code.
* Optimise applications for speed, scalability, maintainability, and accessibility.
* Contribute regularly to shared codebases with minimal oversight.
* Participate in the full software development lifecycle and communicate progress to the Development Director.
* Update, maintain, and modernise existing front-end applications.
Product Analysis & Support (15%)
- Work with Customer Support and Implementation teams to resolve issues and bugs.
* Support cross-functional teams with technical insights, solutions, and guidance.
* Engage with customers and internal teams on technical requirements or project status.
Innovation & Continuous Improvement (5%)
- Stay ahead of front-end trends and emerging technologies.
* Contribute ideas to improve processes, tools, and product capabilities.
* Identify opportunities to drive innovation across the engineering function.
Essential Skills & Experience
- Bachelor's degree in Computer Science, Engineering, or similar discipline (or equivalent experience).
* 5+ years' experience building complex front-end applications at scale.
* React 18+ & TypeScript expertise, including:
– Advanced hooks
– Strict typing, generics
– Composition patterns
– Performance optimisation
* Experience with:
– TanStack Query, Router, Table, Virtual
– Vite
– React Hook Form & Zod
– Nx Workspace
– Tailwind CSS
– Vitest, Cypress, MSW
– Storybook 8
* Strong understanding of component-driven development and design systems.
* Knowledge of micro-frontend architecture, Nx monorepos, and domain-driven design.
* Experience writing high-quality unit, integration, and functional tests.
* Ability to break down complex problems and collaborate with cross-functional teams.
* Strong communication, documentation, and mentoring skills.
Desirable Skills
- Experience working with large-scale API-driven platforms.
* Understanding of cloud-native architecture (Azure, AWS, or GCP).
* Knowledge of CI/CD pipelines and modern DevOps practices.
* Exposure to back-end or full-stack environments.
* Experience working in fast-moving or customer-facing product environments.
Why Join?
- Play a pivotal role in a major front-end platform modernisation.
* Lead technical direction in React while remaining fully hands-on.
* Work across enterprise-scale products used globally.
* Hybrid working with only 2 days on-site in Belfast.
* Exceptional salary package
* Strong engineering culture, collaborative environment, and real autonomy.
* Opportunities to influence architecture, standards, and front-end strategy.
Skills:
React Belfast Derry
WHJS1_NI
”, “datePosted”: “2026-05-08”, “hiringOrganization”: { “@type”: “Organization”, “name”: “Ocho”, “sameAs”: “https://uk.whatjobs.com/pub_api__cpl__426523466__4861?utm_campaign=publisher&utm_medium=api&utm_source=4861&geoID=936” }, “jobLocation”: { “@type”: “Place”, “address”: { “@type”: “PostalAddress”, “addressLocality”: “Belfast” } } }Principal React Engineer
The Opportunity
We’re partnering with a highly regarded technology organisation delivering enterprise-scale digital platforms used by some of the world’s leading brands.
They are now seeking a Principal React Engineer to play a key role in modernising and evolving their front-end architecture as part of a major multi-year transformation programme.
In this role, you will act as the technical leader in the React space – shaping front-end architecture, improving performance, introducing best-practice engineering standards, and contributing significantly to shared codebases. You’ll collaborate closely with product, UX, backend engineering, and data teams to deliver seamless, scalable, customer-facing applications used globally.
This is an opportunity to influence technical direction, set standards, and mentor others, while remaining deeply hands-on in building world-class front-end solutions.
Key Responsibilities
Front-End Engineering & Architecture (80%)
- Design and evolve front-end architecture for complex, distributed systems. * Ensure UI/UX designs are technically feasible, performant, and accessible. * Implement information architecture and interaction design aligned with backend specifications. * Develop new user-facing features using modern, component-driven development. * Build and maintain internal design systems and reusable component libraries. * Write clean, test-driven, production-quality React and TypeScript code. * Optimise applications for speed, scalability, maintainability, and accessibility. * Contribute regularly to shared codebases with minimal oversight. * Participate in the full software development lifecycle and communicate progress to the Development Director. * Update, maintain, and modernise existing front-end applications.
Product Analysis & Support (15%)
- Work with Customer Support and Implementation teams to resolve issues and bugs. * Support cross-functional teams with technical insights, solutions, and guidance. * Engage with customers and internal teams on technical requirements or project status.
Innovation & Continuous Improvement (5%)
- Stay ahead of front-end trends and emerging technologies. * Contribute ideas to improve processes, tools, and product capabilities. * Identify opportunities to drive innovation across the engineering function.
Essential Skills & Experience
- Bachelor’s degree in Computer Science, Engineering, or similar discipline (or equivalent experience). * 5+ years’ experience building complex front-end applications at scale. * React 18+ & TypeScript expertise, including: – Advanced hooks – Strict typing, generics – Composition patterns – Performance optimisation * Experience with: – TanStack Query, Router, Table, Virtual – Vite – React Hook Form & Zod – Nx Workspace – Tailwind CSS – Vitest, Cypress, MSW – Storybook 8 * Strong understanding of component-driven development and design systems. * Knowledge of micro-frontend architecture, Nx monorepos, and domain-driven design. * Experience writing high-quality unit, integration, and functional tests. * Ability to break down complex problems and collaborate with cross-functional teams. * Strong communication, documentation, and mentoring skills.
Desirable Skills
- Experience working with large-scale API-driven platforms. * Understanding of cloud-native architecture (Azure, AWS, or GCP). * Knowledge of CI/CD pipelines and modern DevOps practices. * Exposure to back-end or full-stack environments. * Experience working in fast-moving or customer-facing product environments.
Why Join?
- Play a pivotal role in a major front-end platform modernisation. * Lead technical direction in React while remaining fully hands-on. * Work across enterprise-scale products used globally. * Hybrid working with only 2 days on-site in Belfast. * Exceptional salary package * Strong engineering culture, collaborative environment, and real autonomy. * Opportunities to influence architecture, standards, and front-end strategy.
Skills:React Belfast Derry
WHJS1_NI
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