Remote Senior .NET Backend Engineer | Microservices

N-iX; Polska; Hybrid; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Flexible working format

Competitive salary

Mentorship program

Tech talks and trainings

Centers of excellence

Active tech communities

Job summary

N-iX is seeking a Backend .NET Developer to design, develop, and maintain scalable backend services in a distributed, microservices-based environment. You will work with C#/.NET, REST APIs, databases, and cloud technologies within an agile team to ensure high code quality and performance.

The role emphasizes practical experience with microservices, SQL Server, MongoDB, and messaging systems like RabbitMQ. A strong focus on SOLID, testing, and CI/CD (GitLab) is required, with opportunities for

Qualifications

• Bachelor’s degree in Computer Science, IT, or a related field.
• 3+ years of commercial backend development experience with C#/.NET.
• Strong knowledge of the Microsoft development stack (C#, .NET, SQL Server).
• Experience designing REST APIs and backend services.
• Experience with microservices or distributed systems.
• Understanding of SOLID, clean code, and maintainable architecture.
• Experience with unit and integration testing.
• Experience with Git and CI/CD processes.
• Kubernetes, containerization, and cloud-native development knowledge (AWS/Azure).
• Excellent English or German communication skills.

Responsibilities

• Design, develop, and maintain backend services and APIs using C#/.NET.
• Build scalable solutions based on microservices architecture.
• Develop and integrate backend modules within distributed systems.
• Design and maintain integrations between internal and external systems.
• Work with relational and NoSQL databases including SQL Server and MongoDB.
• Implement asynchronous processing and messaging using RabbitMQ and Hangfire.
• Write clean, maintainable, well-tested code following SOLID principles.
• Develop and maintain unit and integration tests (TDD where applicable).
• Troubleshoot backend issues and improve reliability and performance.
• Contribute to CI/CD pipelines using GitLab and support automated build, test, and deployment.
• Collaborate with DevOps and cloud engineers; participate in Scrum ceremonies.
• Migration to AWS or Azure and cloud-native development.

Job description

N-iX is seeking a Backend .NET Developer to design, develop, and maintain scalable backend services in a distributed, microservices-based environment. You will work with C#/.NET, REST APIs, databases, and cloud technologies within an agile team to ensure high code quality and performance.

The role emphasizes practical experience with microservices, SQL Server, MongoDB, and messaging systems like RabbitMQ. A strong focus on SOLID, testing, and CI/CD (GitLab) is required, with opportunities for