Contract jobs in Richmond Hill, Ontario

Find contract jobs in Richmond Hill, Ontario and nearby towns within 25 km. Read the full details and apply.

Newest first

Within 25 km of Richmond Hill

Added 3 months ago
SB
ABA Instructor Therapist (Ongoing Contract)
Side by Side Therapy - (Now Hiring)
Woodbridge, ON
- $25 to $35 CAD / hour
Added 3 months ago
Warehouse Supervisor (12-Month Contract)
Compugen Inc
Richmond Hill, ON
Added 4 months ago
Software Developer – Back End
Symbiotic Digital
Toronto, ON
Added 2 months ago
Laboratory Technician, Microbiology - 12 Month Contract
SGS
Markham, ON
Added 2 months ago
Contract - Field Crew (Field Technician – UAV / Geophysical Surveys)
Rosor Exploration
Toronto, ON
Added 2 months ago
Director of Engagement (15 Month Contract)
UJA Federation of Greater Toronto
Toronto, ON
Added 4 months ago
Software Developer in Test (Contract) -
CoreFactor Inc.
Toronto, ON
Added 3 months ago
Senior Product Manager
Resonaite
Markham, ON
Added 2 months ago
771 - BAYVIEW FAIRWAYS SA/EDP - Assistant Teacher
Family Day Care Services
Markham, ON
Added 4 months ago
Captioner and Note taker
Habitat Learn
Toronto, Ontario
Added 6 months ago
Specialized IT Consultant – Power BI
Symbiotic Digital
Toronto, ON
Added 3 months ago
Anti-Money Laundering Officer
Hays
Toronto, Ontario
Added 3 months ago
Senior Specialist, Insurance Education & Engagement / Inside Sales Representative (Contract to December 2026)
Ontario Medical Association
Toronto, Ontario
Added 2 months ago
QA Specialist
Symbiotic Digital
Toronto, ON
Added 1 month ago
Talent Acquisition Specialist - 12 month contract
Aecon
Toronto, ON
Added 3 months ago
Machine Learning Scientist (Graduate/Postdoc Level) - Contract
Oncoustics
Toronto, Ontario
Added 3 months ago
Test Architect
J&M Group
Toronto, Ontario
Added 3 months ago
SB
Respite Worker
Side by Side Therapy - (Now Hiring)
Markham, Ontario
- $20 to $24 CAD / hour
Added 3 months ago
Director Sales Operations
PTAG
Markham, Ontario
Added 3 months ago
Senior Java Engineer
Princeton IT Services, Inc
Toronto, Ontario
Added 3 months ago
Sr. .Net Developer
J&M Group
Toronto, Ontario
Added 3 months ago
Configuration Developer (XML / FireLight)
High Tech Genesis
Toronto, Ontario
Added 3 months ago
YH
Child and Family Therapist - Brief Therapy
York Hills Centre for Children Youth and Families
Aurora, ON
- $69,514 to $73,746 CAD / year
Added 3 months ago
E
Production Technician
Embross
Richmond Hill, ON
- Up to $18.5 CAD / hour
Added 4 months ago
Contract Administrator - Tunnel Construction - Toronto
Black & Veatch
Markham, Ontario

J&M Group

Sr. .Net Developer

Toronto, ON, Canada

Contract

Within 25 km of Richmond Hill · About 24.6 km from the city centre

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Job details

Job type: Contract
Apply by: Dec 30, 2026
Posted: Jul 3, 2026

Original job description

Must Have Skills

Core .NET Development
API Development
Testing & Quality Assurance
Security & Vulnerability Resolution
AI and Copilot Development

Responsibilities & Skill Requirements Core .NET Development

Proficiency in .NET Framework and .NET Core
Strong C# and ASP.NET expertise
Object-oriented design principles and SOLID principles
Design patterns (Singleton, Factory, Repository, Dependency Injection, etc.)
Entity Framework and LINQ proficiency

API Development

RESTful API design and development
ASP.NET Core Web API
API security best practices and authentication/authorization
Microservices architecture experience
Experience with API versioning and documentation (Swagger/OpenAPI)

Testing & Quality Assurance

Unit testing frameworks (NUnit, xUnit, MSTest)
Mocking frameworks (Moq, NSubstitute)

Security & Vulnerability Resolution

SAST (Static Application Security Testing) tool experience
DAST (Dynamic Application Security Testing) tool experience
Common vulnerability identification and remediation
Secure coding practices
Authentication and authorization implementation
Data protection and encryption

Additional Technical Skills

SQL Server and database design
GitHub version control
CI/CD pipelines and DevOps experience: Git Action, Ansible, or UCD
Cloud platforms experience (OpenShift/Azure preferred)
Agile/Scrum methodologies

AI and Copilot Development

AI-assisted development experience
AI-powered debugging and optimization

Key Competencies

Strong problem-solving and analytical skills
Excellent code quality and documentation standards
Strong communication and collaboration skills

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More about this job

Responsibilities

The Sr. .Net Developer will be responsible for core .NET development, including API design and development, as well as ensuring testing and quality assurance. The role also involves addressing security vulnerabilities and contributing to AI-assisted development.

Requirements

Candidates must have proficiency in .NET Framework and .NET Core, along with strong expertise in C# and ASP.NET. Experience with API development, testing frameworks, and security practices is also required.

Skills

Core .Net Development
API Development
Testing & Quality Assurance
Security & Vulnerability Resolution
AI and Copilot Development
C#
ASP.Net
Entity Framework
LINQ
RESTful API
Microservices
Unit Testing
SAST
DAST
SQL Server
GitHub

Visa sponsorship

Not detected in the job text

Keywords

Core .Net
API Development
Testing
Quality Assurance
Security
Vulnerability Resolution
AI
Copilot Development
C#
ASP.Net
Entity Framework
LINQ
RESTful API
Microservices
Unit Testing
SAST
DAST
SQL Server
GitHub
CI/CD
DevOps
Agile
Scrum
Cloud Platforms
OpenShift
Azure
Authentication
Authorization
Data Protection
Encryption

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