Senior Software Engineer - Identity

What You'll Do 

• Build and evolve secure, scalable, and high-performance authentication experiences for millions of M&S customers and colleagues 
• Take end-to-end ownership of features — from design and development through testing, deployment, and monitoring in production 
• Contribute to the technical direction of the Identity Platform and help shape solutions that balance customer experience, security, and developer usability 
• Write clean, maintainable, well-tested code, and champion engineering best practices in your team 
• Take shared responsibility for the operational excellence of the Identity Platform, including participating in our 24-hour support rota 
• Collaborate closely with Product Managers, Designers, and Engineers to solve real user problems in thoughtful and innovative ways 
• Actively participate in code reviews, pair programming, technical discussions and creating high quality documentation to share knowledge and continuously improve as a team 
• Mentor and support more junior engineers through coaching and feedback 

Who You Are 

• Experience building and scaling distributed systems, ideally serving millions of users 
• Good knowledge in one or more JVM-based languages (ideally Kotlin with Micronaut) 
• Proven experience in DevOps practices, including running and operating what you build 
• Experience designing CI/CD pipelines and driving improvements in developer productivity 
• Comfortable working in cloud environments (preferably Azure) 
• Experience with identity standards like OAuth 2.0 and OpenID Connect is a strong plus 
• You balance long-term thinking with pragmatic delivery, and thrive in high-autonomy teams