Senior .NET/ C# Developer Frankfurt and Remote

Project overview

For our client in Frankfurt, we are looking for several Senior .NET/ C# Developers starting November 16th for an estimated duration until the end of June 2027 with the option for extension. It is expected to work 2-3 days/week on-site in Frankfurt, and for stage changes, a presence of 3-4 days is required.

Responsibilities

• Implement BFF microservices (UI Orchestration, Account Service, Trading Service) and work on the Atruvia Adapter under the leadership of the Tech Lead.
• Develop Kafka consumers and contract tests.

Requirements

.NET C#

In-depth expertise in modern C# with .NET 9/10

Basic Azure knowledge

AKS Deployment, Azure Service Bus / Event Hub as consumer/producer

Basic Kafka understanding

Topics, Consumer Groups, Offsets – also implemented as a consumer

REST API Development

OpenAPI-compliant REST APIs, HTTP standards, Pagination, Error Handling

Pact / Contract Testing

Wrote consumer-side Pact tests

Docker / Kubernetes Basics

Containerization of own services, Helm Chart Basics

WireMock

Mock server configuration for integration tests

Azure Cloud

Basic knowledge of the Azure environment, especially PaaS (App Services), Managed Databases, and Monitoring (Application Insights)

CMS Experience

Knowledge of Optimizely CMS 12 and the implementation of a headless API for content delivery

Project details

• Start: flexible
• Duration: 16.11.2026 bis 31.06.2027 + Option
• Location: Frankfurt + Remote, DE
• Languages: German