Senior C#/.NET Developer

Role: Senior C#/.NET Developer Location: Toronto, ON (Hybrid- 3/4 days onsite) Required Qualifications: Overall 6+ years of hands on experience in below skills MUST Have skills - C# Developer: C#, .net experience, Server-side development, REST APIs, Middleware integration, Nice To have Skills- Relational databases, MongoDB, Redis. Roles & Responsibilities Design, develop, and maintain server-side components using C# and .NET (Core/Framework) following clean architecture and SOLID principles. Build and maintain RESTful APIs (design, versioning, pagination, error handling, and documentation) and ensure secure authentication/authorization. Develop middleware and integration components to connect internal services with external systems (message formats, adapters, routing, transformation, and orchestration). Implement and consume integrations using common patterns (sync/async), ensuring resiliency (timeouts, retries, circuit breakers) and observability (logging, tracing, metrics). Write unit/integration tests and support automated CI/CD pipelines; ensure code quality through reviews and static analysis. Troubleshoot production issues, perform root-cause analysis, and deliver performance/reliability improvements. Collaborate with product owners, architects, and QA to refine requirements, estimate work, and deliver features within sprint timelines. Produce and maintain technical documentation for APIs, integrations, configuration, and runbooks. We are an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, sexual orientation, or gender identity), national origin, citizenship status, age, disability, genetic information, protected veteran status, or any other characteristic protected by applicable law. https://www.e-verify.gov/sites/default/files/everify/posters/IER_RighttoWorkPoster.pdf

Design, develop, and maintain server-side components and RESTful APIs using C# and .NET. Implement middleware integrations and ensure system resiliency through observability and automated testing.

Requires over 6 years of hands-on experience with C#, .NET, and REST APIs. Proficiency in middleware integration and server-side development is essential, with database knowledge being a plus.

• REST APIsPreferred
• CI/CDPreferred
• RedisPreferred
• .NETPreferred
• MongoDBPreferred
• C++Preferred

Identified from the job description. Confirm important requirements above.

• C#
• .NET
• Server-side development
• REST APIs
• Middleware integration
• Relational databases
• MongoDB
• Redis
• Clean architecture
• SOLID principles
• CI/CD
• Unit testing
• Integration testing
• Root-cause analysis
• Technical documentation

• Software
• Technology
• Engineering

Minimum experience

5+ years

Apply by

Sep 25, 2026

Posting language

English

Working hours

40 hours per week

Office presence

4 days per week

Seniority

Mid-Senior level

Application method

Direct apply is available