Lead Back End Engineer - C# .NET, AWS, Scale

Empiric; Netherlands; Hybrid; EUR 83,000 - 166,000; Full time

Benefits offered by this job

Starter Bonus

Free Lunch Club experience

English Premier League Ticket

Job summary

Empiric is seeking a Back End Developer for scalable backend systems in Amsterdam. You will work on C# .NET 8, ASP.NET Core MVC, and MediatR with complex API contracts used by mobile apps and partners.

Lead experience and architecture knowledge are required to drive releases and maintain backward compatibility. You will integrate with AWS services (ECS Fargate, DynamoDB, Redis, SQS) and use Terraform, GitLab CI, and observability tools.

Qualifications

• C# on .NET 8 and ASP.NET Core MVC
• MediatR handlers and pipeline behaviours, with FluentValidation
• JSON as a contract
• Partner integration: typed HttpClients with IHttpClientFactory
• Polly
• NSwag
• GraphQL
• Testing: xUnit, NSubstitute, FluentAssertions, SpecFlow
• AWS services and CI/CD tooling (Terraform, GitLab CI) and observability (Datadog)

Responsibilities

• Design or maintain an API contract consumed by clients you do not control (mobile apps, partners) with versioning and backward compatibility
• Lead experience with knowledge of architecture and releases
• Contribute to backend services at scale (100k+ active users) and ensure reliable deployments

Skills

C#

NET 8

ASP.NET Core MVC

MediatR

FluentValidation

Tools

IHttpClientFactory

Polly

NSwag

GraphQL

xUnit

NSubstitute

FluentAssertions

SpecFlow

WireMock.Net

AWS (ECS Fargate, Lambda, DynamoDB, SQS)

Terraform

GitLab CI

Datadog

Job description

Empiric is seeking a Back End Developer for scalable backend systems in Amsterdam. You will work on C# .NET 8, ASP.NET Core MVC, and MediatR with complex API contracts used by mobile apps and partners.

Lead experience and architecture knowledge are required to drive releases and maintain backward compatibility. You will integrate with AWS services (ECS Fargate, DynamoDB, Redis, SQS) and use Terraform, GitLab CI, and observability tools.