Senior C# Backend Developer
Develop and maintain backend server-side or standalone desktop applications using C# and .NET. Focus on identifying performance bottlenecks and refactoring code for optimal application efficiency.
- On-site
- Montréal, QC
- Posted Sep 8, 2026
- Apply by Oct 8, 2026
- 1 position
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Job summary
We are looking for a Senior C# Backend Developer with strong expertise in backend/server-side or standalone desktop application development. 🔑 Key Skills: • Expert-level C# / .NET & Visual Studio • Strong multithreading, data structures & algorithms • SQL / SQL Server and application optimization • Experience identifying and refactoring performance bottlenecks • TDD / BDD experience • Strong understanding of .NET internals and API architecture • Git and source control • Experience with gRPC, NHibernate, WinForms, WCF, REST APIs & Swagger • Finance/Trading experience with FX, Rates, Fixed Income or Structured Products is a plus • Excellent English communication and collaboration skills
What you’ll do
Develop and maintain backend server-side or standalone desktop applications using C# and .NET. Focus on identifying performance bottlenecks and refactoring code for optimal application efficiency.
Requirements
Requires expert-level proficiency in C#, .NET, and SQL Server with strong knowledge of multithreading and API architecture. Experience in Finance or Trading is considered a plus.
Listed skills
- .NETPreferred
- C++Preferred
- GitPreferred
Other relevant skills
Identified from the job description. Confirm important requirements above.
- C#
- .NET
- Visual Studio
- Multithreading
- Data Structures
- Algorithms
- SQL Server
- TDD
- BDD
- .NET Internals
- API Architecture
- Git
- gRPC
- NHibernate
- WinForms
- WCF
Job areas
- Software
- Technology
- Finance & Accounting
- Engineering
Additional details
- Minimum experience
- 5+ years
- Apply by
- Oct 8, 2026
- Posting language
- English
- Working hours
- 40 hours per week
- Seniority
- Mid-Senior level
- Application method
- Direct apply is available