Senior C# Back-end Developer

We're looking for an expert-level C# back-end developer to join a delivery team in Montreal. This is a pure back-end role focused on server-side and standalone desktop application development - candidates with primary experience in web, frontend, or full stack development are not the right fit for this position.

What you'll do

• Develop, refactor, and optimize back-end server-side and standalone desktop application components
• Identify and resolve underperforming code to improve application efficiency and performance
• Write robust, well-structured code with strong attention to multithreading, data structures, and algorithms
• Perform code reviews and contribute to cross-team tasks, release management, and regression checking
• Participate in testing efforts including applying TDD and BDD methodologies to new and existing codebases

What you bring

• 8+ years of professional C# development experience in a back-end or standalone desktop application context
• Expert-level proficiency in C# and the Visual Studio environment
• Strong skills in multithreaded programming, data structures, algorithms, SQL, and application optimization
• Proven experience identifying, detecting, and refactoring underperforming code
• Hands-on exposure to technologies including SQL Server, gRPC, Hibernate, Win Forms, WCF, REST APIs, and Swagger
• Deep understanding of programming concepts and genuine curiosity about how APIs and architectural choices work internally
• Eligibility for a mandatory background check

Nice to have

• Prior experience in finance, trading, or domain knowledge across asset classes, rates, FX, fixed income, or structured products
• Familiarity with TDD and BDD concepts and practical application in existing codebases
• French language proficiency

Work setup

• Montreal, QC with up to 2 days remote per week after 3 months, subject to manager discretion
• 6+ month contract
• English required;
  French is a plus
• Quebec statutory holidays apply