Middle .Net Developer (Fintech)

TL;DR

Middle .NET Developer: Implementing and maintaining C#/.NET features for an automated sample processing workflow with an accent on event-driven and async programming patterns, safe concurrency, and stable behavior under load. Focus on developing code through TDD/TLD approaches, ensuring high-quality unit/integration tests, and participating in architectural discussions.

Location: Must be based in Poland, Croatia, or Ukraine

Company

hirify.global is a custom software development company providing a full range of software engineering services to clients globally.

What you will do

• Implement and maintain C#/.NET features using event-driven and async programming patterns.
• Develop code through TDD/TLD approaches with tests as a primary deliverable.
• Create and maintain unit/integration tests using xUnit and FluentAssertions.
• Ensure safe concurrency and stable system behavior under load.
• Participate in code reviews, architectural discussions, and contribute to continuous improvement.
• Collaborate within a cross-functional team and help stabilize complex logic flows.

Requirements

• Solid C#/.NET, async/await, events, and multithreading fundamentals.
• Experience with TDD/TLD, unit testing principles, mocking, and test isolation.
• Competence with xUnit, FluentAssertions, and CI-driven test automation.
• Clean code mindset, SOLID, DI, and modular/hexagonal design concepts.
• Understanding of event-driven design and structured error handling.
• English: Upper-Intermediate (B2) required.

Culture & Benefits

• Close cooperation with a customer.
• Challenging tasks for competence development.
• Work with a team of professionals.
• Dynamic environment with low level of bureaucracy.