Senior .NET Developer fluent in Lithuanian to join a high-impact project delivering robust backend systems and APIs for fast, secure, and scalable information access. The project involves developing a system that enables efficient information filtering and access while working with a modern tech stack, including C#, Keycloak, OpenShift, YARP, Grafana, Sentry, Parquet, and SPARQL.

Key Requirements:

Strong experience with C#/.NET Core for scalable backend and API service development
Hands-on experience with containerized deployments (OpenShift/Kubernetes)
Expertise in API Gateway & Proxy development: request routing, logging, monitoring, auditing, rate limiting, retries, and resilience
Identity & Security: integrating with Keycloak (OAuth2.0/OpenID Connect), JWT validation, secure API design
Knowledge of observability and audit: structured logging, distributed tracing, metrics, audit trails
Proficient in integration with external systems
Experience with asynchronous processing (workers/event-driven, queue handling, retry/DLQ strategies)
Experience with CI/CD, secure coding, and advanced testing practices
Fluency in Lithuanian is mandatory

Nice to Have:

Familiarity with YARP, Grafana, Sentry, Parquet, SPARQL
Prior experience in the public sector or large-scale information systems

Responsibilities:

Design, develop, and maintain scalable .NET Core backend services and APIs
Implement API Gateway and Proxy solutions, ensuring reliability, security, and observability
Integrate identity management solutions using Keycloak, JWT, and OAuth2.0/OpenID Connect
Implement asynchronous processing pipelines, message queues, and retry/DLQ strategies
Collaborate with cross-functional teams to deliver secure, maintainable, and efficient systems
Apply CI/CD, secure coding, and automated testing best practices
Ensure proper monitoring, logging, and auditing across all services
Maintain documentation and participate in code reviews, troubleshooting, and performance optimization

Work Conditions:

Project: Public Sector
Location: Remote from Lithuania
Start Date: ASAP
End Date: 2026-04-01
Contract Type: B2B
Salary: 25-34 EUR/h