Staff Engineer / Technical Lead Azure/.NET

Náplň práce, právomoci a zodpovednosti:
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.

What you will do:
• 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

Zamestnanecké výhody, benefity:
• Teambuildings – Meet your colleagues in informal setting like Family day and let yourself loose during our Christmas and Summer parties. One thing we can assure you of is that in BBG we know how to party
• Coffee bar – Help yourself to sweets and fresh fruit, sparkling water, tea or coffee to the heart’s content
• Employee discounts – Save 30% on anything from our brands (like Klarstein or Capital Sports). Kitchen appliances, top-notch sound systems, garden furniture ... you will surely choose something from 2500 products we have on offer
• Multisport card – Free access to hundreds of sport centres, wellness centres, gyms or classes (yoga, dance, etc.) all around the country. Almost completely paid for by us
• Bonuses for special occasions – We realize, that work is only a part of your life, and will support you on your personal journey as well. And thus, will give you a special bonus on occasions
• Sick days – On top of an annual leave, you have a few paid sick days you can use to recover
• Slovnaft BAjk – If you want to commute by bicycle, we will chip in on your Slovnaft BAjk subscription (bike sharing in Bratislava)
• A wide range of courses – Increase your professional expertise, get hang of people skills or anything else that will help your professional (and personal) life. Courses, books or online library is on your fingertips
• English/German/Slovak lessons – Learn new language or step up your game on one of the professional courses. You can join a lessons with a professional lector online from anywhere
• We offer also place you can leave your bike and after that you can chill in our chill zone, or just took a massage from our massage chair

Požiadavky na zamestnanca:
• 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

Nice to have:
• 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