Senior Software Engineer - Identity and Access Management

Salary: £60,000 - 100,000 per year

Requirements:

• Deep expertise designing scalable backend systems and distributed architectures.
• Experience with high-scale distributed systems in production.
• Strong system design skills.
• Familiarity with B2B SaaS identity, including authentication (SSO/OIDC), authorization, security, and auditing.
• Experience owning services end-to-end, including production operations, incident response, and on-call.
• A system-thinking mindset with an understanding of failure modes, system boundaries, and architecture at scale.
• Backend expertise in C# / .NET, with roughly 80-90% of the work focused on backend development.
• Frontend experience with React / JavaScript is a plus, but not required.
• Ability to use AI-powered tools to accelerate boilerplate code, test generation, and debugging.

Responsibilities:

• Architect and build complex, user-facing features across our identity stack.
• Own business-critical systems from problem definition through architectural design, deployment, and production reliability.
• Build reliable and maintainable authentication and authorization systems with a user-friendly experience.
• Lead incident response and continuously improve code quality and operational health.
• Work closely with teammates across Identity, Product Management, Support, and adjacent teams.
• Lead designs, scoping, and problem-solving for hard product and technical challenges.
• Choose the technology that best solves customer problems while prioritizing long-term maintainability.
• Use AI tools to speed up boilerplate, test generation, and debugging so you can focus on high-value architectural decisions.
• Own services end-to-end, including production operations, monitoring, and on-call.
• Contribute to the unified engineering pipeline and help solve high-priority problems across the company.

Technologies:

• AI
• Architect
• Backend
• C#
• Frontend
• Support
• JavaScript
• React
• Security
• ASP.NET
• Copilot
• GitHub
• JIRA
• Kubernetes
• Network

More:

We are DeepL, a global AI product and research company building secure, intelligent solutions for complex business problems. Our Language AI platform is trusted by over 200,000 business customers and millions of individuals across 228 global markets. We have around 1,000 employees and a diverse, internationally distributed team spanning more than 90 nationalities, with offices and team members across the UK, Germany, the Netherlands, Poland, the US, and Japan. We offer a hybrid work model with flexible hours, virtual shares, regular in-person team events, monthly Hack Fridays, 30 days of annual leave excluding public holidays, mental health resources, and competitive location-based benefits. This London-based Engineering role sits within our Identity and Access Management team, where we own the identity stack for internal and external users and help build the operating system for global communication.

last updated 36 week of 2026