Senior Frontend Engineer
London Stock Exchange Group5 months ago
London, United KingdomSenior
Responsibilities
- Own and maintain a JavaScript SDK built with React and TypeScript.
- Design developer-friendly APIs that abstract OAuth2 and OpenID Connect authentication flows.
- Ensure the SDK is secure, performant, accessible, and compatible across browsers and frontend applications.
- Collaborate with backend engineers on identity protocols and token flows.
- Build automated tests and CI pipelines for quality, reliability, and backward compatibility.
- Write documentation and sample applications for internal and external developers.
- Contribute to frontend security best practices and platform-wide improvements.
Requirements
- Proven frontend development experience with deep expertise in React, TypeScript, and modern JavaScript.
- Experience designing and maintaining SDKs or libraries used by other developers.
- Strong understanding of OAuth2, OpenID Connect, and secure authentication flows.
- Familiarity with CI/CD pipelines, automated testing, and SDK versioning strategies.
- Experience with frontend performance optimization, cross-browser compatibility, and accessibility standards.
- Strong interpersonal skills and an interest in developer experience, clean code, automation, continuous improvement, and security.
Benefits
- Flexible hybrid work model, healthcare, retirement planning, paid volunteering days, wellbeing initiatives, access to learning opportunities and certifications, conference support, internal mobility, and a collaborative culture with performance-based rewards.
Tech Stack
Categories