Middle .NET Developer

We are looking for a motivated Middle .NET Developer to join our team. This is a unique opportunity for someone who wants to move beyond simple CRUD operations and dive into complex data transformations, analytical modeling, and AI-native applications. If you have a strong interest in AI technologies and want to learn how to build secure, scalable architectures under the mentorship of senior experts, we’d love to have you on board!

• Implement data validation rules and quarantine logic for incoming data to ensure reporting accuracy.
• Develop and maintain data ingestion adapters (ETL) to pull data into the analytical Star Schema.
• Create and optimize API endpoints for all standard report types (System Usage, Session Activity, etc.).
• Implement export logic for CSV, Excel (ClosedXML), and PDF (QuestPDF) based on templates.
• Develop GDPR-related features, including data pseudonymization and encryption.
• Assist in building MCP tools to expose metrics to the AI layer as directed by the Senior Developer.
• Write clean, maintainable code and participate in code reviews.

• 3+ years of experience with C# / .NET development (experience with .NET 8 is a plus).
• Strong knowledge of Entity Framework Core and PostgreSQL.
• Solid understanding of RESTful API design and implementation.
• Experience with background services or scheduled tasks (Worker Services, Quartz.NET).
• Familiarity with Clean Architecture principles and Dependency Injection.
• Knowledge of unit testing and integration testing (xUnit / NUnit).
• Strong interest in AI technologies and willingness to work with the Model Context Protocol (MCP).
• English — Intermediate (B1) or higher (ability to read documentation, write commits, and communicate about experience/tasks). Ukrainian — fluent.

• Access to learning opportunities — internal and external training, certification reimbursement.
• 18 paid vacation days, 10 public holidays compensated, and up to 10 paid sick days.
• Partial compensation for English classes + free speaking club.
• Up to $180/year for sports activities.
• Mentorship and knowledge sharing — people you can really learn from.
• Career maps and growth plans to support your professional development.
• New equipment provision, and accounting support if needed.
• Competitive market-level salary with regular reviews.
• Additional perks and compensations such as insurance fund, gifts etc.
• Psychological safety and supportive culture.
• Company values that align with yours.
• Social responsibility — support the Armed Forces.