Mid-level Software Developer – .NET Core, C#, F#

About the role

ETAP is looking for a mid‑level Software Developer to join its Sofia team. You will work on innovative electrical engineering software, contributing to a unified digital twin platform that supports customers throughout the project lifecycle.

Key responsibilities

• Estimate software tasks and provide feedback across development phases.
• Design, implement, and maintain components covering database, business logic, services, and public APIs.
• Write clean code and automated tests aligned with architectural standards.
• Troubleshoot issues, investigate root causes, and deliver reliable solutions.
• Collaborate with Product Management to translate customer challenges into viable software features.
• Participate in backlog refinement, story sizing, and release planning.

Required profile

• Mid‑level experience with Microsoft development stack.
• Strong understanding of technical architecture and software testing.
• Ability to work independently and within a cross‑functional team.
• Proactive attitude toward learning new technologies and sharing knowledge.

Required skills

• C# programming language.
• .NET Core framework.
• F# language.
• Database design and SQL querying.
• API development and integration.
• Automated testing practices.

What we offer

• Opportunity to work on cutting‑edge energy transition software.
• Collaborative environment with continuous learning.
• Full‑time onsite position in Sofia.