Senior Backend .NET Core Developer

Lamdax

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