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Added 2 mins ago
SM
RQ11489 – Software Developer – Intermediate
S M Software Solutions Inc
Toronto, ON
- Internship
Work Arrangement: Onsite – 5 Days per Week
Added 2 mins ago
SM
RQ11489 – Software Developer – Intermediate
S M Software Solutions Inc
Toronto, ON
- Internship
Work Arrangement: Onsite – 5 Days per Week
Added 10 hours ago
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Développeur C#/.NET senior ou développeuse C#/.NET senior
Alithya
Toronto, ON
- Full-time
8+ years of hands-on experience in software development with a strong focus on C# and .NET technologies;
Added 20 hours ago
Software Developer
Nature Fresh Farms
Leamington, ON
Full-stack development experience using .NET (C#/ASP.NET Core) and/or Python, along with experience building and integrating APIs across systems.
Added 1 day ago
Solution architect, digital
National Money Mart Company
Toronto, ON
You will partner with engineering, product, enterprise architecture, security, and business stakeholders to define target-state architecture, guide delivery teams through implementation,…
Added 1 day ago
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Software Developer - Intermediate
Upstaff
Toronto, ON
- Full-time
Work Arrangement: 100% onsite, five days per week
Added 1 day ago
CM
Qa & ui .net developer - asl distribution (oakville)
Challenger Motor Freight Inc. - Corporate Headquarters
Oakville, ON
- $50 to $80 CAD / hour
The QA & UI .NET Developer is responsible for designing, developing, testing, and maintaining web-based and desktop applications that support transportation and logistics operations. This…
Added 1 day ago
FULL STACK DEVELOPER
Rimex Supply Ltd.
Langley, BC
At RIMEX, we operate under one simple premise: provide our customers with the best products and services, period. Our teams combine engineering, manufacturing, technology, and field…
Added 1 day ago
RC
Senior Software Developer
Randstad Canada
Toronto, ON
- Contract
We are seeking an experienced Senior Software Developer to lead the technical design, development, testing, and sustainment of enterprise-grade web applications using Microsoft .NET…
Added 1 day ago
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Senior Software Developer
modis
Toronto, ON
- Contract
- Temporary
Strong experience with .NET web application development (C#, ASP.NET, Web APIs).
Added 1 day ago
Lead Software Developer
Open Text Corporation
Richmond Hill, ON
You’ll need experience with these technologies:
Added 1 day ago
RC
Senior Systems Testing/QA Specialist
Randstad Canada
Toronto, ON
- Contract
Development, Debugging & Break/Fix: Hands-on experience with full-stack application development, troubleshooting, debugging, and implementing defect fixes and enhancements (Strictly…
Added 1 day ago
GE
Programmeur en vision par ordinateur / Computer Vision Programmer
GEPR Energy Canada Inc
Longueuil, QC
- Full-time
- Hybrid
Software development is primarily carried out using C# / .NET. We are seeking someone with a solid programming foundation who is eager to develop strong expertise in industrial machine…
Added 1 day ago
RQ08219 - Sr. Software Developer - Back End
Rubicon Path
Toronto, ON
…assistance in implementation, conversion and General Skills: Experience in programming and analysis; specialized software package support at the specified experience level Ability to…
Added 1 day ago
RQ08804 - Software Developer - Senior
Rubicon Path
Toronto, ON
The Software Developer (L3) is invited to work in a modern Workplace that is driving business transformation by utilizing the latest Microsoft technology to power and streamline business…
Added 1 day ago
RQ09011 - Software Developer - Senior
Rubicon Path
Toronto, ON
The Software Developer (L3) is invited to work in a modern Workplace that is driving business transformation by utilizing the latest Microsoft technology to power and streamline business…
Added 1 day ago
Senior Software Engineer
Dye & Durham Corporation
Montréal, QC
Relational database knowledge and experience working with SQL and Oracle databases.
Added 1 day ago
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Full stack developer (PL4742)
Paralucent
Toronto, ON
- Full-time
- Temporary
- On-site
Knowledge and experience with design and implementation of the overall web architecture.
Added 1 day ago
Senior .NET (C#) Developer - IoT (Zigbee, BLE)
Industry Professionals
Montréal, QC
Were Hiring for Our Client: Senior .NET (C#) Developer IoT (Zigbee, BLE)
Added 1 day ago
SC
RQ11140 - Sr. Software Developer
Source Code
Toronto, ON
- $69.9 to $104.86 CAD / hour
Hands-on experiences in developing Web/Windows applications using C#, .net Core, ADO.net, SQL Server 2005/2008R2, and .Net Framework 4.0/5.0 with strong knowledge of Object-Oriented…
Added 1 day ago
SC
RQ11141 - Sr. Software Developer
Source Code
Toronto, ON
- $69.9 to $104.86 CAD / hour
Hands-on experiences in developing Web/Windows applications using C#, .net Core, ADO.net, SQL Server 2005/2008R2, and .Net Framework 4.0/5.0 with strong knowledge of Object-Oriented…
Added 1 day ago
SC
RQ11139 - Sr. Software Developer
Source Code
Toronto, ON
- $69.9 to $104.86 CAD / hour
Hands-on experiences in developing Web/Windows applications using C#, .net Core, ADO.net, SQL Server 2005/2008R2, and .Net Framework 4.0/5.0 with strong knowledge of Object-Oriented…
Added 1 day ago
SC
RQ11237 - Sr. Software Developer - Back End
Source Code
Toronto, ON
- $69.52 to $104.28 CAD / hour
NOTE: Hiring Manager is looking for a strong full-stack developer with API Dev exp.
Added 1 day ago
SC
RQ00788 - Software Developer - Full Stack - Seniorx3
Source Code
Toronto, ON
- $72.16 to $108.29 CAD / hour
Must Have skills:
Added 1 day ago
Senior .Net Developer
Apply now!
Mississauga, ON
The Senior .NET Developer role supports the modernization, development, and maintenance of the warehouse management software platform, including migration of legacy .NET Framework…

Altis

Senior Developer (.NET/Angular)

Toronto, ON, Canada

$85 to $95 CAD / hour · Contract

Apply on jobportal.altis.com About employer

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Job details

Pay: $85 to $95 CAD / hour
Job type: Contract
Experience: 10+ years of enterprise software development experience using C#, .NET Core, ASP.NET Core, and legacy ASP.NET Framework technologies.
Posting language: English
Posted: Sep 22, 2026

Original job description

Location: Toronto, ON, Hybrid (3 days on-site per week)
Language: Excellent written and verbal English communication skills
Duration: 1-year contract
Background Check Requirement: Successful completion of a criminal background check may be required.

About the Opportunity
Join a large public sector digital transformation initiative focused on modernizing critical home and community care technology. As a Senior Software Developer, you will play a key role in transforming legacy enterprise applications into scalable, cloud-enabled solutions that improve the delivery of essential services across Ontario.

Working alongside architects, business analysts, QA professionals, and development teams, you will help design and deliver secure, high-performing applications using modern Microsoft technologies. This is an opportunity to contribute to a multi-year modernization program while influencing architecture, mentoring peers, and delivering meaningful technology solutions.

What's In It for You
Work on a large-scale modernization program using the latest Microsoft and Azure technologies while helping shape the future of enterprise application development. You'll join a collaborative environment that values innovation, knowledge sharing, and continuous improvement, offering exposure to complex technical challenges and opportunities for professional growth.

Your Responsibilities
• You'll design, develop, test, deploy, and maintain enterprise applications using C#, .NET Core, ASP.NET Core, Angular, JavaScript, and related technologies.
• You'll modernize legacy .NET Framework, WCF, Windows Services, Windows Forms, and IIS-hosted applications by decomposing monolithic systems into modular, API-driven solutions.
• You'll build secure REST APIs, implement JWT and OAuth2 authentication, and develop scalable, high-performance applications using asynchronous and multithreaded programming.
• You'll develop and optimize Microsoft SQL Server databases while supporting Azure App Services, Azure SQL, Storage, Event Hub, Azure Data Explorer, Key Vault, Application Insights, and Azure Monitor.
• You'll support Azure DevOps CI/CD pipelines, perform code reviews, troubleshoot production issues, and collaborate with cross-functional teams to deliver secure, maintainable software solutions.

Skills and Qualifications
• 10+ years of enterprise software development experience using C#, .NET Core, ASP.NET Core, and legacy ASP.NET Framework technologies.
• Demonstrated experience modernizing legacy applications, designing REST APIs, and implementing secure authentication and authorization using JWT and OAuth2.
• Strong experience developing Angular applications, including AngularJS migration, JavaScript, HTML, CSS, jQuery, component-based architecture, and responsive user interfaces.
• Advanced Microsoft SQL Server expertise, including T-SQL, stored procedures, indexing, query optimization, execution plans, and database performance tuning.
• Hands-on experience with Microsoft Azure services, Azure DevOps, Git, CI/CD pipelines, application monitoring, and cloud-native development.
• Strong understanding of software architecture, Domain-Driven Design (DDD), API-first design, event-driven architecture, design patterns, Agile delivery, and secure software engineering practices.
• Experience developing and supporting integrations between healthcare applications and systems.
• Familiarity with HL7 standards and healthcare messaging, including troubleshooting HL7 interfaces.
• Knowledge of FHIR standards, resources, APIs, and modern healthcare interoperability.
• Hands-on experience developing, configuring, monitoring, and troubleshooting Mirth Connect channels and integrations is considered a strong asset.

Why Partner with Altis
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.

We appreciate the time and effort all applicants invest in their submissions. Please note that only candidates shortlisted for this role will be contacted directly. However, your profile will remain under consideration for future opportunities that align with your experience and career goals.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 2SLGBTQIA+ 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.

Apply on jobportal.altis.com About employer

More about this job

Responsibilities

The Senior Developer at Altis will design, build, test, deploy and maintain enterprise applications, modernizing older systems into modular, cloud-based solutions. They will also support CI/CD pipelines, review code, troubleshoot production issues and work with cross-functional teams.

Requirements

Candidates need 10+ years of enterprise .NET development, Angular and SQL Server experience, plus Azure and modernization skills. Healthcare integration knowledge such as HL7, FHIR and Mirth Connect is a strong asset.

Skills

C#
.NET Core
ASP.NET Core
ASP.NET Framework
Angular
AngularJS
JavaScript
HTML
CSS
jQuery
WCF
Windows Services
Windows Forms
IIS
REST APIs
JWT
OAuth2
Microsoft SQL Server
T-SQL
Stored procedures
Query optimization
Azure App Services
Azure SQL
Azure Event Hub
Azure Data Explorer

Keywords

Senior Developer
C#
.NET Core
ASP.NET Core
Angular
AngularJS
JavaScript
SQL Server
T-SQL
Azure
Azure DevOps
CI/CD
REST API
OAuth2
JWT
HL7
FHIR
Mirth Connect
Domain-Driven Design
Agile

Seniority

Senior

Tools

Azure DevOps
Azure App Services
Azure SQL
Azure Event Hub
Azure Data Explorer
Azure Key Vault
Application Insights
Azure Monitor
Git
Mirth Connect

Languages

English

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Work requirements

Jobs in Canada