Senior Backend .NET Core Developer

Role Overview

We are seeking a Senior Backend .NET Core Developer to design and implement highly scalable microservices using Domain-Driven Design (DDD), event-driven architectures, and gRPC APIs. You’ll build performance, secure data layers with EF Core and MS SQL Server, integrate robust authentication/authorization, and drive best practices across the team.

· Architect & develop microservices – apply DDD to define bounded contexts and aggregates; implement CQRS; build modular .NET Core services

· Design event-driven solutions – implement publish/subscribe workflows with RabbitMQ/Azure Service Bus/Kafka; handle event contracts, serialization, idempotency

· Build gRPC APIs – define protobuf contracts, service definitions, versioning; optimize bidirectional and streaming calls for low latency

· Optimize data access & performance – model schemas in MS SQL Server; tune EF Core queries; profile and resolve bottlenecks (caching, indexing, async patterns)

· Enforce security & compliance – integrate JWT, OAuth 2.0/OpenID Connect (OpenIddict/IdentityServer); apply secure coding practices, encryption, secrets management

· Collaborate & mentor – partner with Product Owners, QA, Front-end, and Mobile teams to clarify requirements; lead code reviews and share best practices

· Estimate & plan – provide high-level effort estimates with strong accuracy and adjust plans under pressure

Required Qualifications

· Bachelor’s in Computer Science/Engineering or equivalent

· 6+ years hands-on .NET Core and C# experience; deep understanding of both .NET Framework and .NET Core

· Deep understanding of microservices and distributed systems programming models

· Proven background in event-driven architectures (pub/sub, event sourcing)

· Strong proficiency with gRPC and protobuf

· Expert with Entity Framework Core and MS SQL Server (T-SQL, indexing, migrations)

· Solid experience with authentication & authorization frameworks (JWT, OAuth2, OpenID Connect)

· Strong knowledge of GOF design patterns and SOLID principles

· Strong understanding of network fundamentals (HTTP, TCP/IP)

· Demonstrated ability to profile and optimize high-throughput services

· Strong experience with multithreading programming models

· Excellent analytical, problem-solving, estimation, and communication skills

· Agility and ability to work effectively under pressure while keeping commitments