Staff Engineer / Technical Lead

Who you are

• 8+ years of professional backend development experience with C# and the .NET ecosystem (ASP.NET Core, .NET 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 — integrating .NET 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

What the job involves

• As Staff Engineer / Tech Lead Azure/
• NET, you'll own the technical direction of our
• NET and Azure platforms - leading the design of scalable, cloud-native solutions across a landscape that spans
• NET and PHP-based e-commerce systems
• You'll 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
• You'll 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 across .NET, 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