Staff Engineer Technical Lead

As Staff Engineer / Tech Lead Azure/.NET youll own the technical direction of and Azure platforms - leading the design of scalable cloud-native solutions across a landscape that and PHP-based e-commerce systems. Youll split your time between hands-on architecture work and technical leadership: driving key engineering decisions mentoring engineers and pushing the modernization of our platforms forward. Youll work closely with Software Engineers DevOps QA and Product and your decisions will directly shape engineering excellence reliability and developer productivity at Klarstein.

• Own the architecture and technical direction of critical services leading the design and implementation of complex backend and cloud-native solutions
• Lead technical investigations proof of concepts and modernization/refactoring strategies identifying technical debt and driving pragmatic long-term platform improvements
• Collaborate PHP DevOps QA Product and external teams translating business requirements into scalable technical solutions
• Mentor engineers through design discussions code reviews pair programming and technical coaching
• Drive engineering excellence best practices in testing security observability and operational reliability including incident/root-cause support and contributing to engineering standards and documentation
• Promote AI-assisted engineering practices to improve developer productivity and software quality

• 8 years of professional backend development experience with C# and ecosystem ( 8/10 Entity Framework Core REST APIs OpenAPI/Swagger) combined with a strong architectural mindset for designing scalable resilient distributed systems
• Proven experience designing cloud-native systems on Microsoft Azure including microservices event-driven architecture asynchronous messaging and API-first design with hands-on use of core Azure services (e.g. Service Bus Event Grid Azure Functions App Services Key Vault Application Insights)
• Experience designing secure cost-optimized cloud architectures (networking identity/access management application security) and building production systems with CI/CD Infrastructure as Code (Terraform preferred) and observability practices
• Strong experience with relational and NoSQL databases (SQL Server Cosmos DB MongoDB) and working across heterogeneous systems services PHP applications and third-party/enterprise platforms (e.g. SAP REST/SOAP APIs)
• Track record mentoring engineers leading technical reviews and driving engineering standards across teams ideally within Agile cross-functional environments (Product DevOps QA architects)
• Excellent written and spoken English

• Familiarity with AI-assisted development tools (GitHub Copilot Claude Cursor Windsurf) and using them to improve development testing and documentation workflows
• Deep grounding in clean architecture / domain-driven design principles
• Direct experience integrating with SAP or comparable large-scale enterprise platforms

• 40% employer contribution to the company pension plan
• Up to 28 days per year working from abroad (EU)
• Public transport ticket grant & 30% discount on our products
• A bright modern dog-friendly office right on the Spree in Friedrichshain - rooftop views included four-legged colleagues welcome
• Team breakfast every two weeks - where we actually talk not just stand-up updates
• Support by a team of highly skilled and dedicated colleagues who celebrate successes together at our company events

Since 2005 Klarstein has been developing stylish functional and affordable home appliances designed for everyday use and is now one of Europes leading digital brands.

With a consistent end-to-end approach - from product concept and design through quality assurance and marketing to logistics and customer service - Klarstein stands for high quality reliability and an excellent price-performance ratio.

With approximately 400 employees worldwide international locations in Europe and Asia and its own logistics centers the company serves over 25 million customers in 21 European countries.