Back-End Developer (C# / .NET) – RabbitMQ, Entity core, Docker components – Böblingen

Optimus Search

We’re a growing SaaS company building modern, scalable web applications used by customers who expect things to just work.

We’re looking for a Back-End Developer who enjoys designing solid systems, writing clean code, and thinking about scale from day one.

Tasks

Designing and building back-end services using C# and ASP.NET (REST APIs)

Working with Entity Framework Core to design and optimise data access

Building and integrating message-based systems (event-driven, async workflows, etc.)

Helping shape system architecture with scalability, performance, and reliability in mind

Collaborating closely with product and front-end teams to deliver real features, not just tickets

Improving existing systems — refactoring, optimising, and making things simpler

Profile

Strong experience with C# / .NET CORE + in production environments

Solid understanding of ASP.NET Core and RESTful API design

Hands-on experience with Entity Framework Core

Experience working with message brokers (e.g. RabbitMQ, Azure Service Bus, Kafka, etc.)

A good grasp of scalable system design and modern back-end patterns

Someone who cares about code quality, maintainability, and performance

Nice to have

Experience working in SaaS products

Cloud experience (Azure, AWS, or similar)

Familiarity with CI / CD, containers, or microservices

An interest in keeping up with modern .NET and back-end best practices

We offer

You’ll work on cutting-edge tech, not legacy maintenance

Real influence over architecture and technical decisions

A team that values clean solutions over quick hacks

Room to grow as the product and company scale