.NET Developer

Location: North York, Hybrid 3-4 days a week on site Language: Strong written and verbal communication skills in English Duration: 6 month contract to start + possible extension Background Check Requirement: Criminal background check required

Join a forward-thinking technology organization delivering innovative solutions across financial services, real estate, and public sector environments. This is an opportunity to work on impactful, enterprise-level applications that support critical business operations and drive digital transformation.

You will collaborate with a talented, cross-functional team of developers, product leaders, and designers who value innovation, quality, and continuous improvement. Your work will directly influence scalable platforms and contribute to a culture that prioritizes mentorship, knowledge sharing, and technical excellence.

Be part of a collaborative and growth-oriented environment that encourages curiosity and innovation. You will gain exposure to modern cloud technologies and enterprise architecture while working alongside experienced professionals who support your development. Enjoy a flexible workplace that values balance, continuous learning, and meaningful contributions.

• You’ll design and develop high-performance applications using C#, .NET Core, and ASP.NET technologies
• You’ll architect scalable, secure solutions that meet evolving business needs
• You’ll mentor developers, conduct code reviews, and champion best practices
• You’ll collaborate with cross-functional teams to translate requirements into technical solutions
• You’ll optimize databases and APIs to ensure performance and reliability
• You’ll support CI/CD pipelines, cloud deployments, and application monitoring

• 5-7+ years of progressive experience in .NET software development
• Strong expertise in C#, ASP.NET Core, Web API, and RESTful services
• Strong experience with Microsoft SQL Server, Entity Framework, and database design.
• Experience with Claude Code
• Proficiency with modern frontend technologies such as Angular, React, or Blazor
• Hands‑on experience with Azure or AWS and cloud‑based architectures
• Solid understanding of CI/CD pipelines, Dev Ops, and containerization (Docker, Kubernetes).
• Strong knowledge of OOP, SOLID principles, design patterns, and microservices architecture.
• Proficiency in Git, Agile methodologies, and unit testing frameworks.
• Strong problem‑solving skills and a collaborative, team‑oriented mindset

• Experience with No
  
  SQL databases (Mongo
  
  DB, Redis, Cosmos
  
  DB).
• Familiarity with Graph
  
  QL, gRPC, and real‑time communication (Signal
  
  R, Web Sockets).
• Knowledge of AI/ML integration with .NET applications.
• Microsoft Certified:
  Azure Developer Associate or .NET Developer.

We’re looking for someone who enjoys solving complex problems and takes pride in building scalable, high‑quality solutions while supporting and mentoring others on the team.

If you’ve never worked with a staffing agency before, we make it easy. We work with top employers across Canada who have great jobs to fill, each vetted and verified by our team. When you apply for a job with Altis, we get to know you as a candidate and learn what your strengths are. Then, if you’re a solid match, we handle all the logistics, advocating for you as a candidate for the role, providing access to coaching and connecting you directly with the hiring manager.

And rest assured, all our services are free of cost for candidates.

All qualified applicants will receive fair consideration for employment. We welcome individuals of all backgrounds, experiences, and identities including those who identify as women, members of racialized groups, Indigenous Peoples, persons with disabilities, and 2

SLGBTQIA+ communities. If you require an accommodation, please review our accessibility policy and reach out to our accessibility officer with any questions. Our human recruiters review all applications and always make the final hiring decision. On occasion, we also use AI‑assisted tools to help review applications.