Role Description We are looking for a skilled (Senior) Backend Engineer to join one of our cross-functional product teams. The role requires a high level of technical expertise, excellent communication skills, and a proactive, collaborative mindset. This position is embedded in ongoing client projects and will be closely integrated into our ways of working. - Self-organization & Precision: You work independently and precisely, planning your tasks thoroughly and proactively. - Staying Up-to-Date: You keep your finger on the pulse, staying informed about current trends in your field. You bring this knowledge into your work and team, making suggestions for potential innovations. - Resilience: You write highly resilient code. - Security: You are capable of identifying and resolving security vulnerabilities. - Software Patterns: You understand the fundamentals of software design patterns and are able to apply them within the project. - Performance: You are capable of analyzing and troubleshooting performance issues. - Testing: You can write tests for complex scenarios and analyze the results. - Metrics (Maintainability, Complexity, etc.): You can interpret code metrics and derive actionable improvements for your software. - Problem-Solving: When you spot a challenge or a problem, you actively work toward a solution and support others in doing so. Qualifications - .NET/.NET Core - C# - Entity Framework - REST-API - PowerShell - SQL - Build- and Deploy-Prozesse in Azure DevOps - Experience with microservice architectures - Experience with Azure Service Bus / RabbitMQ / MassTransit - Experience with Elasticsearch / OpenSearch - Comfortable with direct client communication - Fluent communication in German and English Benefits - Flexible employment and remote work - International projects with leading global clients - International business trips - Non-corporate atmosphere - Language classes - Internal & external training - Private healthcare and insurance - Multisport card - Well-being initiatives

• Design and implement scalable, efficient, and secure enterprise-level software architectures across our .NET stack. • Write, test, and debug complex code for high-load systems with strict latency and reliability requirements. • Deliver clean code to production in a timely manner, balancing business speed with technical excellence. • Identify and eliminate performance bottlenecks across CPU, memory, I/O, and database layers. • Conduct thorough code reviews to enforce strict code quality, security, and industry best practices. • Develop and enforce testing protocols to guarantee software reliability and flawless production performance. • Implement and monitor production observability frameworks, including logging, metrics, monitoring, and distributed tracing. • Create and maintain concise, meaningful technical documentation for system designs and architecture. • Provide guidance and mentorship to junior and mid-level engineers, actively fostering their technical growth. • Partner with Delivery Managers to lead and manage software development projects, ensuring predictable, high-quality delivery. • Collaborate closely with product management, design, and operations teams to align technical execution with business goals. • Communicate effectively with stakeholders, translating complex technical concepts into clear project updates.

• Independently investigate and design relatively complex systems • Optimize system performance and ensure the stability of system services • Translate business requirements and use cases into functional applications • Design, build, and maintain efficient, reusable, and reliable Java code • Review, test, and verify code for adherence to quality and security standards • Ensure the best possible performance, quality, and responsiveness of the applications • Identify bottlenecks and bugs, and devise solutions to these problems • Help maintain code quality and organization

• Developing REST APIs in Python • Implementing new features for the application backend and frontend • Troubleshooting issues • Creating documentation • Working in an agile methodology and collaborating with a team • Supporting teammates • Attending daily standups with the customer