Senior Full Stack Developer

Location: Toronto, ON (On-site, 5 days per week)

Duration: 12-Month Contract

Language: Excellent written and verbal English communication skills required

About the Opportunity

We are seeking a Senior Full Stack Developer to join a high-impact public sector technology team focused on delivering modern, scalable, and user-centered digital solutions. This opportunity is ideal for a developer who enjoys working across the full technology stack and contributing to applications that support critical government services and programs.

Working closely with business stakeholders, architects, developers, and project teams, you will play a key role in designing, developing, and enhancing enterprise applications. The successful candidate will bring strong API development expertise, modern front-end development skills, and previous Ontario Public Service experience to help drive successful project outcomes in a collaborative Agile environment.

What’s In It for You

• Contribute to meaningful public sector initiatives that impact citizens across Ontario

• Work alongside experienced technology professionals in a collaborative environment

• Gain exposure to complex enterprise applications and cloud-based technologies

• Be part of a culture that values innovation, continuous learning, and knowledge sharing

• Apply modern development practices while helping shape user-focused digital experiences

Your Responsibilities

• You'll develop and maintain enterprise-scale N-tier applications using .NET technologies and C#

• You'll design, build, and support secure, scalable APIs and backend services that drive business-critical applications

• In this role, you'll create responsive user interfaces using Angular, Material Design, HTML, CSS, and JavaScript

• You'll troubleshoot, optimize, and support applications hosted within Microsoft Azure App Services

• You'll write and maintain SQL queries, stored procedures, and database integrations to support application functionality

• You'll translate technical specifications into tested, production-ready solutions through coding, debugging, and unit testing

• You'll collaborate with project teams and stakeholders throughout the Software Development Life Cycle to deliver high-quality solutions

Skills and Qualifications

• 10+ years of progressive experience developing N-tier enterprise applications

• 10+ years of hands-on experience with .NET Framework, C#, MVC, Web Services, and Web API development

• Demonstrated experience developing and supporting backend APIs and integration services

• Strong experience building applications using Angular and Material Design

• Experience with HTML, CSS, JavaScript, and modern web development practices

• Experience supporting and troubleshooting applications within Microsoft Azure App Services

• Strong SQL development skills, including stored procedures in Microsoft SQL Server, Cosmos DB experience is considered an asset

• Experience applying UX principles and incorporating user feedback into solution design

• Experience working within Agile delivery environments

• Previous Ontario Public Service (OPS) experience is required

• Strong analytical, problem-solving, communication, and stakeholder engagement skills

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.