C# Backend Senior Engineer (London-based)

Workplace: remote Requirements 5+ years of experience with C#/.Net REST APIs Microservices architecture OAuth2, JWT, OIDC Graph modeling Distributed systems Understanding of RBAC, ReBAC, ACL, and policy evaluation is a plus Nice to have Hands-on experience with Identity & Authorization Experience with policy engines / policy-as-code Experience with API Gateway, Kubernetes, Service Mesh Neo4j OpenFGA SpiceDB OPA Redis Kafka Responsibilities Develop Authorization SDKs Evolve Policy APIs Create and maintain Authorization microservices Develop Identity services Implement RBAC, ReBAC, ACL, and policy evaluation Build graph relationships, permission inheritance, and delegated administration Build integrations with API Gateway, AI Gateway, Kubernetes, and Service Mesh Write automated tests, authorization regression suites, and performance tests We offer Projects for such clients as PayPal, Wargaming, Xerox, Philips, Adidas and Toyota Competitive compensation that depends on your qualification and skills Career development system with clear skill qualifications Flexible working hours aligned to your schedule Options to work remotely Any questions? Natalya hh@itransition.com