Senior Frontend Systems Engineer (TypeScript) – UI Frameworks | London
£150,000 – £200,000 + pension, private healthcare, gym membership, hardware budget
London (Hybrid – 2 days WFH)
Most frontend roles sit on top of frameworks.
This one builds them.
A high-growth software company is engineering a next-generation UI framework and data visualisation platform used in mission-critical environments by global enterprises, financial institutions, and technology companies.
Their products power applications used by millions of users every day.
What you’ll be doing
- Solving complex problems around data structures, recursion, memory usage, and rendering performance
- Building features end-to-end — from design through to release
- Contributing to a product used by engineering teams globally
What they’re looking for
- Background in C++, Java, or C# — or a clear systems-level way of thinking
- Solid understanding of algorithms, data structures, and performance optimisation
- Experience building complex systems (not just standard web apps)
- Good understanding of how frameworks (React, Angular, Vue) interact with the DOM
- Ability to identify bottlenecks, debug performance issues, and optimise effectively
- High standards around code quality, design, and maintainability
Why this role stands out
- You’ll work on problems most frontend engineers never get near
- You’ll be part of a deeply technical, engineering-led team
- High autonomy, low bureaucracy
- Real impact on a product used globally
Package includes
- Pension
- 25 days holiday + bank holidays
- High-spec hardware
- Central London office (hybrid working)
If you want to engineer the foundations behind some of the world’s most demanding applications, this is the environment built for you. Get in touch!
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