ROLE PROFILE:
We are seeking a Senior Lead Frontend Developer to join our Customers Identity & Access Management team at LSEG. You will play a pivotal role in maintaining and evolving our JavaScript SDK, a critical interface that enables secure authentication and seamless integration of our Authentication into client applications across to our customers.
This role is ideal for someone who thrives in developer experience, SDK design, and security-focused frontend engineering.

What You’ll be doing:
- Own and maintain a JavaScript SDK built with React and TypeScript, enabling secure integration with our custom Secure Token Service.
- Design intuitive, developer-friendly APIs that abstract complex authentication flows (OAuth2, OpenID Connect).
- Ensure the SDK is secure, performant, and easy to integrate across a wide range of frontend applications.
- Collaborate with backend engineers to align SDK functionality with evolving identity protocols and token flows.
- Build automated tests and CI pipelines to ensure quality, reliability, and backward compatibility.




- Write clear documentation and sample apps to support internal and external developers.
- Stay current with frontend security best practices and contribute to platform-wide improvements.

What You'll bring:
- Professional should have 10 – 15 years of total IT experience.
- Proven of experience in frontend development, with deep expertise in React, TypeScript, and modern JavaScript.
- Proven experience designing and maintaining SDKs or libraries used by other developers.
- Solid understanding of OAuth2, OpenID Connect, and secure authentication flows.
- Familiarity with CI/CD pipelines, automated testing, and versioning strategies for SDKs.
- Experience with frontend performance optimization, cross-browser compatibility, and accessibility standards.
- Passion for clean code, automation, and continuous improvement.
- Excellent interpersonal skills and a passion for developer experience and security.

What you’ll

📌 Senior Lead Software Engineer (Bengaluru)
🏢 London Stock Exchange Group
📍 Bengaluru