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Full Stack Developer (Legacy & Modernization)
OnePlan
Software Engineering
Canada
Posted on Apr 16, 2026
At OnePlan, we specialize in creating AI-enabled solutions that make strategic portfolio, financial, resource, and work management seamless. We help businesses bridge the gap between strategy and execution by offering solutions that boost business agility, streamline project management, and optimize resources.
What Makes us Unique?
What truly makes OnePlan stand out is our commitment to delivering powerful solutions and fostering a culture of collaboration. We combine robust analytics with a platform that integrates seamlessly into the tools businesses already know and trust. Our high-trust, team-focused environment allows us to innovate quickly and deliver solutions that drive meaningful results for our clients. We're passionate about exceeding expectations, working together to empower organizations to succeed in a rapidly changing business landscape.
- Department
- Product
- Employment Type
- Permanent - Full Time
- Location
- Canada
- Workplace type
- Fully remote
What You’ll Do at OnePlan
As a Full Stack Developer, you’ll work across a mix of legacy and modern technologies, supporting existing applications while building new functionality as part of an ongoing transition to a more modern, Azure-based architecture. You’ll play a hands-on role in both stability and forward-looking development.
- Design and build product features across a suite of platforms, balancing work between legacy WebForms components and newer development in .NET 10 Blazor
- Support the transition of applications toward an Azure-based architecture, contributing to both design decisions and hands-on implementation
- Work with SQL Server using T-SQL to build, optimize, and maintain performant data structures and queries
- Collaborate closely with Product, UX, and other members of the team to translate requirements into clean, scalable solutions
- Contribute to DevOps practices, including CI/CD pipelines, deployments, and improving overall development workflows
- Maintain and improve existing code, with a focus on stability, performance, and gradual modernization
- Participate in code reviews and team discussions to keep quality high and approaches consistent
- Troubleshoot and resolve issues across the stack, from UI through to database
Our Ideal Fit
- 3 to 5 years of experience building SaaS or enterprise web applications
- Strong experience with C# and .NET across both legacy and modern frameworks
- Hands-on experience with WebForms and an understanding of how to work within and modernize legacy systems
- Experience building modern web applications using Blazor or similar frameworks
- Solid experience with SQL Server, including writing and optimizing T-SQL queries
- Experience working with Azure, or a strong understanding of cloud-based application design
- Exposure to DevOps practices, including working with pipelines, deployments, and version control
- Comfortable working across the full stack, with a heavier focus on front end experience (around 70 percent front end)
- Experience working in Agile environments and collaborating with cross-functional teams
- Strong problem solving skills and the ability to work through ambiguity without needing a lot of direction
- Clear communicator who can work well with both technical and non-technical stakeholders
Bonus Points
- Experience contributing to or leading modernization efforts from legacy to cloud-based architectures
- Familiarity with Microsoft ecosystem tools (Azure DevOps, Office 365 integrations, etc.)
- Exposure to AI-enabled product features or data-driven applications
More Reasons Why You Should Apply!
- We’re a remote-first company with team members across the USA, Canada, UK, and India!
- OnePlan has been recognized as the Global Microsoft Partner of the Year in Project Portfolio Management in 2019, 2020, 2021, 2022 and 2023.
- We’ve been named a "Strong Performer" in the latest Forrester Strategic Portfolio Management WAVE report.
- We offer comprehensive health, dental, and vision benefits, with additional insurance options.
- Employer RRSP and 401K matching programs.
- A fun, collaborative, and diverse environment with regular health and team challenges to keep things light and enjoyable!
At OnePlan, we are committed to equal employment opportunities regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or expression, or veteran status. We are proud to be an equal-opportunity workplace.
Upon receipt of an offer letter, candidates will be subject to a standard background check process.
Disclaimer: We’ll only contact candidates who have applied directly through our official channels. Any communication about job offers will always come from an email address linked to OnePlan Solutions, and we’ll follow our standard hiring process every time. You’ll never be asked for money or personal information during the interview process. If something feels off, don’t hesitate to reach out to us to confirm.
Ready to Apply?
Check out what it’s like to work at OnePlan and learn more about us at https://oneplan.ai/
Disclaimer: We’ll only contact candidates who have applied directly through our official channels. Any communication about job offers will always come from an email address linked to OnePlan Solutions, and we’ll follow our standard hiring process every time. You’ll never be asked for money or personal information during the interview process. If something feels off, don’t hesitate to reach out to us to confirm.
Ready to Apply?
Check out what it’s like to work at OnePlan and learn more about us at https://oneplan.ai/
About OnePlan Solutions
OnePlan offers a strategic portfolio, financial and resource management solution that fits the needs of every PMO. Optimize your portfolio, financials and resources enterprise wide. Connect OnePlan with Microsoft Project, Office 365 Planner, Azure DevOps, Jira, and more for a complete view into all work across the enterprise.
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