Mid .NET Backend Developer

Quick Facts

• Role: Software Engineer (.NET) / Mid .NET Backend Developer

Description

You will build and maintain backend services using C# and .NET (ASP.NET Core). Responsibilities include designing and implementing RESTful API interfaces, applying async/await and concurrency best practices, and ensuring performance, scalability, and reliability. You will also work with SQL and MongoDB, ASP.NET Core middleware/request pipeline, and core observability practices.

Responsibilities

• Develop and maintain backend services with C# and .NET / ASP.NET Core
• Write clean, maintainable, high-performance code using best practices
• Design and implement RESTful API interfaces
• Use async/await and handle concurrent operations correctly
• Apply Dependency Injection and understand service lifecycles (Singleton/Scoped/Transient)
• Ensure application performance, scalability, and reliability
• Work with SQL and MongoDB (querying and optimizing data access)
• Participate in data migration tasks
• Work in ASP.NET Core request pipeline and middleware
• Implement logging and monitoring and support core observability practices
• Collaborate in an Agile / Scrum environment

Requirements

• Minimum 3 years of commercial experience with C# and .NET
• Strong OOP knowledge (interfaces vs abstract classes)
• Experience with async/await and asynchronous programming concepts
• Good knowledge of Dependency Injection patterns
• Knowledge of SQL and MongoDB (relational and NoSQL)
• Ability to analyze, debug, and troubleshoot performance and logic issues
• Knowledge of cloud platforms (AWS, Azure, or GCP)
• Experience with Agile / Scrum
• Strong communication and analytical skills
• English at least Upper-Intermediate (B2/C1)

Benefits

• Remote work: flexibility to work from anywhere
• Interesting projects matched to your skills and interests
• B2B contract with no exclusivity clause
• Career development through work with modern technologies and diverse projects