We are looking for an experienced Senior Backend .NET Developer to join a project team responsible for building and enhancing enterprise-grade solutions for a customer portal and its related services. This is a 6-month project-based role with the potential for extension, offering the opportunity to influence architecture, drive technical decisions, and deliver high-quality, scalable software.

Key Responsibilities

• Define and document technical implementation details and tasks.
• Refine backlog items and acceptance criteria with technical insights.
• Collaborate with product managers, scrum masters, and cross-functional teams on functional and non-functional requirements.
• Lead solution design, documentation, and architectural contributions.
• Shape and maintain an architectural roadmap aligned with best practices.
• Design and integrate APIs (RESTful and gRPC) for internal and external systems.
• Deliver high-quality code with unit testing, peer reviews, and CI/CD pipelines.
• Integrate internal systems, databases, and third-party services (REST APIs, MQTT, gRPC).
• Design and optimize database schemas (Microsoft SQL or similar).
• Collaborate with QA teams to validate system behavior and resolve issues.
• Contribute to release management, deployment automation, and environment setup.
• Partner with DevOps engineers to improve delivery pipelines.
• Mentor junior developers and conduct code reviews.
• Drive best practices, continuous improvement, and adoption of new technologies.

Requirements

• Strong expertise in ASP.NET Core MVC, C#, and the .NET ecosystem (8+).
• Solid experience with Entity Framework Core and Microsoft SQL Server.
• Proficiency in Docker and containerized applications.
• Hands-on experience with gRPC and messaging protocols (e.g., MQTT).
• Proven ability to integrate third-party APIs and services.
• Familiarity with Azure cloud services (App Services, Functions, SQL, Storage).
• Strong background in scalable, distributed system design.
• Understanding of microservices, Domain-Driven Design (DDD), and event-driven architecture.
• Fluent English and strong communication skills.
• Proven ability to collaborate with stakeholders and mentor team members.

Preferred Qualifications

• Experience with hybrid architectures.
• Knowledge of CI/CD tools (Azure DevOps, GitHub Actions).
• Exposure to monitoring and observability (Application Insights, Grafana).
• Relevant certifications in .NET, Azure, or related technologies.

What we offer:

• B2B contract with competitive compensation, based on experience.
• Possibility to work remotely.
• An open, transparent and fun work culture.
• Multi-national team and collaborative work environment.
• Continuous knowledge sharing with engaged co-workers.
• Career and professional growth opportunities.