About Rentsync:
Rentsync is an award-winning, high-growth organization that provides high quality websites, marketing services, and software solutions to the rental and property management industry throughout Canada and the United States.

About the Role

We’re looking for an experienced .NET Core Developer to help build and enhance modern, business-oriented applications. In this role, you’ll design and maintain scalable APIs, optimize server-side performance, and contribute to the ongoing evolution of our systems using Clean Architecture and modern C# patterns. You’ll collaborate closely with product, front-end, and QA teams to deliver secure, reliable, and efficient solutions. This is a great opportunity to work with cutting-edge tools and AI technologies while refactoring legacy systems and shaping the future of our platform.

Duties & Responsibilities

• Develop, maintain, and optimize server-side logic and database structures.
• Design and implement RESTful APIs and other web services to support front-end functionality based on a description from the product team.
• Create and support existing unit and integration tests.
• Participate in the refactoring of the legacy code (.NET 4.8).
• Collaborate with front-end developers, QA team, and product managers to find a solution to reach functional and non-functional requirements.
• Implement data security and protection measures.
• Stay updated with emerging back-end technologies and best practices.
• Troubleshoot, debug, and resolve issues in production and development environments.

Required Skills, Knowledge & Qualifications:

• 5 years+ experience with .NET Core with API development for business oriented projects
• High level of knowledge of EF
• CQRS/MediatR experience in a workplace setting
• Deep understanding of Clean Architecture
• Familiarity with Modern C# patterns and approaches (primary constructors, records, nullable reference types, source generators, etc.)
• Experience with Unit tests creation and modification (NSubstitute library)
• AI tools knowledge and practical application skills
• Located in Canada & legally entitled to work in Canada

Rentsync is an equal opportunity employer. If you are selected to participate in the interview process and require unique accommodations, please don’t hesitate to let us know.

Successful candidates may be required to complete a criminal background check in the final phase of the interview process.