We are looking for a Senior .NET Developer to join our team and work on a B2B platform for certified online courses and training materials in a specialized professional niche.
Responsibilities: * Design and develop features across .NET Core and legacy VB.NET / Web Forms codebases * Quickly understand unfamiliar code and make clean, minimal, well-targeted changes * Refactor and modernize existing code incrementally, without large-scale rewrites * Work with MySQL on a live production database — schema design, indexing, query optimization, and safe versioned migrations * Ensure proper testing and deliver stable, consistent releases * Conduct code reviews and support team members in solving complex tasks * Document key technical decisions (e.g. in ADRs or a shared knowledge base) * Clearly explain and justify technical decisions to the team * Communicate effectively with team and US-based client, with at least ~1 hour of overlap with US Mountain Time
Requirements: * 4+ years of commercial .NET development experience * Strong knowledge of C# and .NET, with ability to read and work in legacy VB.NET + Web Forms * Deep understanding of Entity Framework (EF Core) and manual SQL * Strong hands-on experience with MySQL specifically * Proficient in Git and Azure DevOps * Experience with unit/integration testing, including covering legacy code * Responsible, controlled use of AI-assisted development tools (Claude Code, Codex, Cursor, etc.) — validating AI output and documenting significant decisions * Upper-Intermediate English or higher
Would be a plus: * Experience with Telerik UI, Blazor, or .NET MAUI * Experience with Azure, IIS / Windows Server * Background in aviation, eLearning, or other regulated domains
We Offer: * Innovation Culture: Work in a team that actively experiments with AI and modern development approaches * Real Product Impact: Direct collaboration with a client and influence on product decisions * Flexible Work: Remote work or a modern office in Kyiv * Generous Time Off: 20 paid vacation days + 15 sick leave days annually * Professional Growth: Compensation for courses, certifications, and learning resources * Cutting-Edge Tools: Access to premium AI tools (Cursor Pro, Сlaude Code, GitHub Copilot, etc.)
