Job Details

Senior Backend Developer with 5+ years of experience in .NET services, PostgreSQL, microservices, and integrations. Focus on reliability, performance, and security. Apply via resume to @*****.

Design and development of .NET services: application business logic, payment and orchestration flows. Ensuring reliability: idempotency, retries, deduplication, outbox/Saga, failure handling. Integration of external APIs: correct work with headers/cookies, formats (multipart/x-www-form-urlencoded, JSON), compliance with specifications. DB design (PostgreSQL): schemas, indexes, migrations, query and lock optimization. Work on performance and scalability: profiling, reducing p95/p99, caching, rate limiting. Ensuring security: secrets/KMS storage, access control, secure configuration and deployment.

5+ years of experience. Deep knowledge of network protocols and web integrations: HTTP/2, CORS, cookies, multipart/x-www-form-urlencoded. Cryptography and formats: Ed25519, SHA-256, working with binary protocols and byte prefixes. Databases: PostgreSQL, schema design, indexes, transactions, migrations (EF Core). Microservices and integrations: gRPC/Protobuf, queues/brokers (RabbitMQ/Kafka), Outbox and idempotency patterns. Reliability under load: retries, timeouts, polling, limiters, circuit breaker. Observability: Prometheus/Grafana, structured logging, tracing (OpenTelemetry). Containerization and CI/CD: Docker, basic deployment and configuration practices. Clean code and architecture: SOLID, unit and integration tests, code reviews, API design. Nice to have: Experience with anti-bot mechanisms (e.g., Cloudflare: headers, sessions). Knowledge of DDD and event-driven approaches, Saga/orchestrators, managing transactional boundaries in distributed systems. Experience in payment security and anti-fraud, KMS/Secret management. Experience with property-based testing, load and performance testing, benchmarks.