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# Senior JavaScript Engineer | DataGrid & Charting Libraries | London

- **Company:** techstack Recruitment
- **Location:** London, UK
- **Experience:** Expert
- **Salary:** £150,000.0 - £200,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), JavaScript (Programming Language), Big Data, C Sharp (Programming Language), C++ (Programming Language), Software Quality, Data Structures, Memory Management, Python (Programming Language), Software Engineering, TypeScript, ReactJS, Vue.js, AngularJS
- **Published:** May 16, 2026
- **Apply:** https://find.jobs/jobs-near-me/senior-javascript-engineer-datagrid-charting-libraries-london-london/2770242354-2/

## About the Role

* Strong JavaScript and TypeScript fundamentals (framework-agnostic mindset)
 * Experience with a statically typed language (C++, C#, Java, Python, etc.)
 * Deep understanding of algorithms, data structures, and software design
 * Experience building complex systems - not just application-layer UI
 * Familiarity with React, Angular, or Vue (and how they interact with the DOM)
 * Ability to reason about performance, memory usage, and rendering behaviour
 * High standards for code quality, maintainability, and correctness

## Description

* Developing and optimising a high-performance DataGrid and charting library used globally
 * Solving complex problems around rendering, large datasets, and real-time updates
 * Working across data structures, algorithms, and performance-critical code paths
 * Contributing to both grid and visualisation components
 * Building features end-to-end - from design through to release
 * Shaping the direction of widely adopted developer tooling


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