Senior Full Stack Developer - Permanent - 19536

Mississauga, ON
Hybrid
Posted Oct 10, 2026
1 position

$110,000–$120,000 / year

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Employment type: Full-time
Experience level: Senior · 5+ years
Posting language: English
Working hours: 40 hours per week
Office presence: 3 days per week
Seniority: Mid-Senior level

Job summary

Design, develop, and maintain full-stack applications, APIs, database solutions, and Azure microservices, while maintaining and modernizing Classic ASP systems. Collaborate with stakeholders, review code, mentor junior developers, establish engineering standards, and resolve production issues.

Job details

About The Opportunity We're looking for a talented and experienced Senior Full Stack Developer to join our growing engineering team. This isn't just another job, it's a chance to work on meaningful products, tackle interesting technical challenges, and genuinely shape the direction of our software. You'll be working across the full stack, from classic web technologies to modern cloud-native architectures, so breadth and adaptability are key. If you're someone who loves solving hard problems, takes pride in clean and maintainable code, and thrives in a collaborative environment, we'd love to hear from you. Duties include but are not limited to: Design, develop, and maintain full-stack web applications using a modern .NET-based technology stack Work with Classic ASP codebases — maintaining, refactoring, and migrating legacy systems where appropriate Build rich, responsive user interfaces using Blazor (WebAssembly and/or Server) Develop and maintain RESTful APIs and backend services using .NET Core Write efficient, well-structured database queries and manage schemas in SQL Server/Azure SQL Architect and implement Azure Microservices to support scalable, resilient application design Collaborate closely with product, design, and other engineering stakeholders throughout the development lifecycle Participate in code reviews, technical discussions, and contribute to setting engineering standards Mentor junior developers and share knowledge across the team Troubleshoot production issues and own resolution end-to-end About You Beyond the tech, we care about who you are as a developer and teammate. The successful candidate will have the following: 5+ years of professional software development experience, with a strong full-stack background Comfortable navigating both legacy codebases and modern architectures without losing your mind (or your sense of humour) Strong communication skills, you can explain technical decisions to non-technical stakeholders A collaborative, team-first attitude. We build things together here Self-motivated and ownership-oriented, you see things through to completion Curiosity and a commitment to continuous learning About the Job Competitive salary, $110,000 to $120,000/year Hybrid - 3 days a week in Bolton Working with a great leader Flex Time and strong benefits LROIT How To Apply Please apply by clicking the “Apply Now” button below and follow the instructions to submit your résumé. You can also apply by submitting your résumé directly to jpbaragwanath@lrostaffing.com. If you are already registered with us, please contact your Senior Recruiter. Please quote job 19536. LRO Staffing values fairness, confidentiality, and human judgment in every stage of our hiring process. We do not use automated or AI-driven screening tools to assess applications. Each submission is reviewed by an experienced recruiter to ensure a thoughtful and equitable evaluation of every candidate. Thank you for your interest in this role. One of our Recruiters will be in touch with you if your profile meets the requirements for the role and the expectations of our clients. Please note that all candidates must be permitted to work in Canada to be considered for this opportunity.

What you’ll do

Requirements

Candidates need at least five years of professional software development experience and a strong full-stack background, including comfort with both legacy codebases and modern architectures. Strong communication, collaboration, ownership, and a commitment to continuous learning are also expected.