Principal Software Engineer

Ocho People; Belfast; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A dynamic technology firm in Northern Ireland is seeking a Principal TypeScript Engineer to lead the development of large-scale React applications. The ideal candidate will have 8+ years' experience in software engineering, a deep expertise in React, and a passion for mentoring engineers. This role offers a high degree of autonomy, technical leadership, and the chance to shape the front-end engineering direction across multiple products.

Benefits

Competitive salary

Generous benefits package

High autonomy in role

Qualifications

• 8+ years of software engineering experience with extensive work in TypeScript.
• Expert-level knowledge of React and its modern ecosystem.
• Proven experience influencing multiple teams or products.

Responsibilities

• Lead the technical direction of large-scale React + TypeScript applications.
• Define and evolve engineering standards across teams.
• Architect complex front-end systems focused on performance.

Skills

TypeScript

React

Front-end architecture at scale

Automated testing frameworks

Mentoring

Communication

Tools

Webpack

Vite

Jest

Job description

Are you a technical leader who thrives on solving complex front-end problems?

Do you want to guide engineering standards, shape architectural decisions, and elevate a high-performing product team?

Are you ready to take ownership of large-scale React applications at an organisation building modern, user-centric platforms?

Principal TypeScript Engineer (React Focus)

Location: Northern Ireland (Hybrid available)

Contract Type: Full-time

Client: My client

About the Role

My client is seeking a highly experienced Principal TypeScript Engineer with deep expertise in React to lead the next phase of their product evolution. You'll play a pivotal role across architecture, engineering excellence, technical strategy, and developer mentorship.

This is a senior technical leadership position - ideal for someone who wants influence, autonomy, and the responsibility of ensuring the front-end ecosystem remains scalable, maintainable, and performant.

Key Responsibilities

• Lead the technical direction of large-scale React + TypeScript applications.
• Define and evolve engineering standards, patterns, and best practices across teams.
• Architect complex front-end systems with an emphasis on performance, modularity, and reliability.
• Guide major technical initiatives, refactors, or migrations.
• Provide mentorship and leadership to Senior and Mid-level engineers.
• Work closely with Product, Design, and Backend teams to deliver cohesive, high-quality features.
• Conduct high-level code reviews and ensure technical quality across the codebase.
• Drive improvements in CI/CD, testing strategy, and overall developer experience.
• Champion accessibility, performance optimisation, and clean, maintainable code.

Required Experience

• 8+ years of software engineering experience, including extensive work with TypeScript.
• Expert-level knowledge of React and its modern ecosystem (Hooks, Context, Suspense, SSR, Redux/RTK, or alternatives).
• Strong understanding of front-end architecture at scale - modular design, micro-frontends, monorepos, component libraries.
• Proven experience making technical decisions that influence multiple teams or products.
• Deep knowledge of modern tooling (Webpack, Vite, Turborepo, PNPM, SWC, etc.).
• Strong experience in automated testing frameworks (Jest, Testing Library, Cypress, or Playwright).
• A track record of mentoring and uplifting engineering teams.
• Exceptional communication and ability to collaborate across functions.

Nice to Have

• Experience with Node.js or backend TypeScript services.
• Exposure to cloud-native environments (AWS, GCP, or Azure).
• Experience working in high-traffic or high-performance environments.
• Familiarity with design systems or UI library architecture.

What's on Offer

• Opportunity to shape front-end engineering direction across products.
• High autonomy and genuine technical leadership.
• Work within a modern engineering culture that values innovation and quality.
• Competitive salary and benefits package.

If you have any further questions on the role, please feel free to reach out to Brendan McCrory directly.