Principal Software Engineer (React)

Principal Front-End Engineer (React / TypeScript)

Are you a React engineer who wants to build products where you can actually see the impact of your work?

My client is looking for a hands-on Senior Front-End Engineer to play a key role in shaping their technical direction. You’ll work with React, TypeScript, and modern design principles to build data-rich applications and reusable components that enhance the payments experience for merchants.

What you’ll do:

• Build and optimise front-end applications with React and TypeScript.
• Translate complex data into intuitive, responsive user interfaces.
• Collaborate with UX, product, and engineering teams to deliver secure, user-friendly payment solutions.
• Create and maintain a reusable component library aligned to the design system.
• Contribute across the full development lifecycle, from requirements through to deployment.

What we’re looking for:

• 10+ years in software engineering, with front-end expertise.
• Proven experience working with large and complex data sets.
• Strong skills in modern JavaScript (ES6+), React, HTML, CSS/SASS.
• Familiarity with REST APIs, OAuth2/OIDC, and data visualisation (D3.js or similar).
• Payments industry experience preferred.
• Strong analytical and problem-solving skills, with the ability to mentor and lead where needed.
• Proactive, adaptable, and comfortable in both individual and team settings.

This is an opportunity to join a fast-moving engineering team where you’ll see the direct impact of your work on customers every day.