C#/.NET Developer

Project overview

Framework Parameters:

For a modernization program, external senior .NET expertise is needed for the independent conception, development, and technical coordination of defined backend deliverables. The scope of services includes translating business and architectural requirements into actionable technical concepts, epics, stories, and work packages, as well as their hands-on implementation within a cloud-native, microservice-based target architecture.

• Duration: ASAP
• 18.12.2026 + Option for extension
• Location: Remote & in Darmstadt
• Utilization: Full-time

Responsibilities

Our Requirements

Several years of senior experience in development with C# and current .NET technologies, as well as proven practical experience in microservices and web APIs.

Practical expertise in developing cloud-native applications (Microsoft Azure) and confident handling of container platforms (Kubernetes, AKS, Helm).

In-depth knowledge in setting up event-driven systems (Kafka), working with relational databases (SQL), and in modern CI/CD and DevOps practices (GitHub Actions, Grafana).

Experience in requirements engineering, detailing architectural specifications, and in-depth debugging of distributed system landscapes.

Fluent German and very good English skills.

Strong problem-solving skills, experience in technical coordination of international Scrum teams.

• Conception, design, and implementation of modular microservices, web APIs, and event-driven systems (C#, .NET, Kafka, SQL/Azure SQL); analysis of legacy systems and derivation of transformation and migration strategies; creation of architectural artifacts, documentation, and familiarization with new frameworks according to Clean Code principles.
• Development of cloud-native applications on Microsoft Azure and Kubernetes/AKS (incl. Helm, IaC concepts); setup, operation, and further development of automated CI/CD pipelines via GitHub Actions and Git workflows (branching, merges, PRs).
• Ensuring performance, stability, and maintainability through automated tests (unit, component, integration, smoke tests) in close coordination with test automation teams; conducting code reviews, independent debugging/error analysis in distributed systems, monitoring via Grafana, and reflective use of modern AI development tools.
• Interface between architecture, product, development, and QA; detailing architectural specifications, clarifying technical dependencies and risks, and ensuring integration capability; knowledge transfer, pairing, moderation of design reviews and development coordination in an international environment.
• Translation of complex requirements into structured work packages, epics, stories, and tasks in Jira; definition of technical acceptance criteria, tracking of deliverables, roadmap refinement, and continuous documentation according to Scrum methodology.
• Multi-year, business-critical modernization and transformation program; highly automated, scalable, and fault-tolerant cloud-native Azure/AKS target architecture with DevSecOps focus and multinational, distributed teams.

Project details

• Start: ab sofort
• Duration: 2 Monate
• Remote: hybrid
• Location: Darmstadt, Deutschland, DE
• Languages: German