Czym będziesz się zajmować? Active development of a custom internal CRM/workflow systemEnhancing backend logic and infrastructureInvolvement in architectural decisions and technical improvementsImplementing high-quality, maintainable, and performant codeConducting code reviewsClarifying and analyzing in-house business requirementsTeam set-up:Team of 13 people, including 1 Team Lead and 7 Senior Developers. Collaborative, senior-level environment with a strong focus on clean code and quality architecture.About the project:You’ll be involved in developing and improving an internal CRM and workflow system, working across one of three technical teams. While all teams focus on backend development, the final team assignment will depend on your individual skills and experience

Kogo poszukujemy? 📍 Warsaw / Poznań / Lublin – Hybrid model (2-3 days/week in the office)💰 135 PLN/hour B2BJoin a leading German telecommunications and IT company at the forefront of cloud computing, web hosting, and internet services. As part of its ongoing expansion, the company is opening a new European Technology Center in Poland - and we're looking for skilled .NET Engineers to be part of this exciting journey.Must-have skills:Strong knowledge of C# and .NET Framework / .NET CoreSolid understanding of relational databases and SQL (any dialect)Experience with RESTful APIsExperience with SOAP (ASMX) web servicesVery good communication skills – ability to engage with internal business teamsEnglish at B2 level or higher (spoken and written)Nice-to-have / differentiators (may determine project team assignment):Experience with Angular and TypeScript (frontend-focused team)Strong skills in multithreading & asynchronous programmingAdvanced SQL optimization and performance tuningBonus points for:ASP.NET MVC, JavaScript, BootstrapJenkinsGerman language skills (not required)