Senior .NET Backend Architect — Remote-Friendly

Qualysoft GmbH; United States; Remote; USD 110,000 - 150,000; Full time

Benefits offered by this job

Premium medical

Lunch tickets

Bookster

13th salary

Flexible remote work

Professional growth

Learning platforms

Mentorship program

International exposure

Job summary

Qualysoft GmbH is seeking an experienced backend engineer to design, develop, test, and maintain scalable services using .NET technologies. You will contribute to backend architecture, ensure security, and support multi-tenancy.

You will work with SQL Server, EF Core, Dapper, and messaging with RabbitMQ, while mentoring junior developers and collaborating with Product, QA, DBA, and DevOps teams. Remote work is considered.

Qualifications

• At least 7 years of professional experience with C#, .NET / .NET Core, and ASP.NET Core.
• Hands-on experience with Microsoft SQL Server and T-SQL.
• Experience designing REST APIs and asynchronous programming.
• Experience with Entity Framework Core and/or Dapper.
• Familiar with Git, code reviews, unit testing, and CI/CD (Azure DevOps preferred).
• Strong mentoring and collaboration skills.

Responsibilities

• Design, develop, test, and maintain backend services and REST APIs.
• Contribute to backend architecture decisions focused on maintainability and security.
• Write efficient T‑SQL queries and optimize SQL Server performance.
• Implement data access with Entity Framework Core and/or Dapper.
• Integrate with internal and external systems, including RabbitMQ.
• Mentor mid-level and junior developers and collaborate with Product, QA, DBA, and DevOps teams.
• Lead code reviews and promote backend coding standards.
• Participate in modernization and refactoring initiatives.
• Use AI tools like GitHub Copilot to boost productivity while ensuring quality.
• Write and maintain unit and integration tests.

Skills

C#

.NET Core

ASP.NET Core

REST APIs

RabbitMQ

GitHub Copilot

Unit testing

CI/CD

Mentoring

Tools

Microsoft SQL Server

Dapper

Entity Framework Core

Azure DevOps

Job description

Qualysoft GmbH is seeking an experienced backend engineer to design, develop, test, and maintain scalable services using .NET technologies. You will contribute to backend architecture, ensure security, and support multi-tenancy.

You will work with SQL Server, EF Core, Dapper, and messaging with RabbitMQ, while mentoring junior developers and collaborating with Product, QA, DBA, and DevOps teams. Remote work is considered.