Senior Software Engineer, Lambda

• 5+ years of backend or platform engineering experience
• Strong experience building or working on authentication and/or authorization systems
• Solid understanding of IAM fundamentals:
• Authentication (OAuth2, OIDC, SAML)
• Authorization (RBAC, ABAC, or similar models)
• Identity lifecycle concepts (provisioning, deprovisioning)
• Experience building distributed systems in a cloud or SaaS environment
• Strong coding skills in Python or Go, with experience building production backend systems
• Experience designing APIs and working with service-oriented architectures
• Ability to independently own projects and deliver high-quality systems
• Strong debugging, problem-solving, and communication skills
• You do not need to match all of the listed expectations to apply for this position

Desirable

• Build and scale Lambda’s Identity and Access Management (IAM) platform, enabling secure, reliable and intuitive access control across all products and customers
• As a Senior Engineer, you will own the design and implementation of core IAM capabilities such as RBAC, authentication flows, and identity lifecycle systems
• You’ll work within Lambda’s broader IAM architecture to deliver systems that are secure, scalable and easy for developers and customers to use
• This role is ideal for engineers who enjoy working on security-critical systems, care deeply about correctness and usability, and can independently drive complex features from design through production
• IAM is a critical foundation for Lambda’s enterprise readiness and will shape how customers securely access compute, data, and infrastructure at scale
• Design and implement core IAM components including identity models, authentication flows and authorization systems
• Build and evolve enterprise IAM features such as RBAC, SSO (SAML/OIDC), SCIM provisioning, MFA, and audit logging
• Own end-to-end delivery of IAM features from technical design to production rollout and monitoring
• Collaborate with teams across API Experience, Billing, Core Cloud Platform, Console Experience, Infrastructure and Security to integrate consistent identity and access patterns across systems
• Contribute to API design and ensure consistency in identity and permission semantics across services
• Participate in design reviews and provide thoughtful input on system architecture and tradeoffs
• Debug and resolve complex production issues in security-sensitive systems
• Improve system reliability, observability, and operational workflows for IAM services
• Mentor junior engineers and contribute to raising the bar on engineering quality