Senior.Net Developer

About the Position

Zaven is a software company based in Wrocław, Poland, specializing in the development of high-quality custom software solutions for essential industries. The company focuses on delivering practical, results-driven outcomes and emphasizes trust in its people over rigid processes and bureaucracy. Zaven promotes a collaborative environment with skilled teams working on impactful technology initiatives, combining agility and autonomy with strong architectural support. It distinguishes itself through its pragmatic approach, streamlined structure, and commitment to building important, production-ready systems without the constraints of large corporate hierarchies.

Now we’re looking for a Senior.NET Developer to join our team on a project for one of our international clients.

Responsibilities

• Leading development work across.NET, C#, and Azure-based applications.
• Reviewing and improving code quality, performance, maintainability, and reliability.
• Working on application performance optimizations, including async/await, EF Core usage, caching, API design, memory allocation, HttpClient usage, long-running processes, and error handling.
• Supporting the decomposition of monolithic functionality into modular components or services.
• Partnering with QA teams on testability, regression coverage, defect triage, and release readiness.
• Mentoring mid-level developers and raising engineering standards.
• Collaborating with product and business stakeholders to clarify requirements and reduce rework.
• Participating in production issue analysis and root-cause reviews.

Requirements

• 10+ years software development experience.
• Strong C#,.NET, ASP.NET Core, Web API experience.
• Strong Entity Framework / EF Core experience.
• Strong Azure experience: App Services, Azure SQL, Application Insights, Azure DevOps, CI/CD.
• Experience improving performance and reliability in production systems.
• Experience leading developers, reviewing code, and setting engineering standards.
• Strong communication skills with both technical and non-technical stakeholders.

Nice to Have

• Angular / React / front-end experience.
• Redis / distributed caching.
• Azure Front Door, API Management, Service Bus, Storage.
• Insurance, fintech, or regulated environment experience.
• Experience with test automation and CI/CD quality gates.

We Offer

• Competitive salary: 150-190 PLN per month.
• Opportunity to work in a dynamic and innovative environment.
• Collaborative and supportive team culture.
• Professional growth and development opportunities.

About the Company

Zaven is a software company based in Wrocław, Poland, specializing in the development of high-quality custom software solutions for essential industries. The company focuses on delivering practical, results-driven outcomes and emphasizes trust in its people over rigid processes and bureaucracy. Zaven promotes a collaborative environment with skilled teams working on impactful technology initiatives, combining agility and autonomy with strong architectural support. It distinguishes itself through its pragmatic approach, streamlined structure, and commitment to building important, production-ready systems without the constraints of large corporate hierarchies.