Lead Backend Developer (.NET)

REMOTE GLOBAL

Responsibilities:

• Design and development of .NET services: application business logic, payment and orchestration flows.
• Ensuring reliability: idempotency, retries, deduplication, outbox/Saga, failure handling.
• Ensuring security: secrets/KMS storage, access control, secure configuration and deployment.
• Integration of external APIs: correct handling of headers/cookies, formats (multipart/x-www-form-urlencoded, JSON), compliance with specifications.
• Database design (PostgreSQL): schemas, indexes, migrations, query and lock optimization.
• Work on performance and scalability: profiling, reducing p95/p99, caching, rate limiting.
• Team management (2-4 developers): task distribution, code reviews, mentoring, onboarding new hires, helping resolve blockers.
• Building an effective development process, implementing code and architecture standards, improving CI/CD and testing practices within the team.
• Communication with related teams and stakeholders: coordinating integrations with product, analytics, QA, DevOps, agreeing on technical solutions.
• Regular analysis of problems (incidents, long releases, controversial code points), initiating and controlling technical improvements.

Requirements:

• 5+ years of experience and at least 1-2 years in a Tech Lead / Team Lead role (or a clear desire and readiness to take on leadership tasks with a strong technical background).
• Code review and mentoring experience: ability to provide constructive feedback.
• 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.

Will be a plus:

• 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.