Lead Software Engineer - Frontend Developer

🏢 About LSEG (London Stock Exchange Group)

LSEG is a leading global financial markets infrastructure and data provider. We enable businesses and economies around the world to fund innovation, manage risk, and create jobs. With a history spanning over 300 years and a presence in 65 countries, LSEG provides the stability and trust that allow our customers to pursue their ambitions with clarity.

🎯 The Role

We are seeking a Lead Software Engineer to join our Customer Identity & Access Management (CIAM) team in Bangalore. You will play a pivotal role in maintaining and evolving our JavaScript SDK—a critical interface that enables secure authentication for client applications across our global financial ecosystem.

🛠️ Tech Stack

• Core: React, TypeScript, Modern JavaScript Ecosystem
• Security: OAuth2, OpenID Connect (OIDC), Secure Token Service (STS)
• Architecture: SDK Design, API Lifecycle, Library Maintenance
• DevOps: CI/CD Pipelines, Automated Testing, Semantic Versioning
• Platform: High-performance, Accessible, and Cross-browser Web Apps

💼 What You'll Do

• Lead the design and maintain our core JavaScript SDK built with React and TypeScript.
• Architect intuitive, developer-friendly APIs that simplify complex authentication flows.
• Ensure the SDK is performant, secure, and easily integratable across various platforms.
• Develop automated test suites and CI pipelines to ensure backward compatibility.
• Collaborate with global teams to align identity protocols with business requirements.
• Author clear technical documentation and reference applications for developers.

✅ What You'll Need

• 10-15 years of professional experience in software engineering.
• Mastery of React, TypeScript, and modern frontend development.
• Proven track record of designing and maintaining SDKs or developer-facing libraries.
• Deep understanding of secure authentication flows (OAuth2/OIDC).
• Experience with automated testing and versioning strategies for distributed libraries.
• Strong interpersonal skills and a passion for developer experience (DX).

🌟 Nice to Have

• Experience in the financial services or high-security fintech domain.
• Active engagement in the security or frontend open-source community.
• Expertise in infrastructure-as-code and cloud-native deployment.