Senior Software Developer Jobs in Markham, ON (NOW HIRING)

About the Opportunity

Our client is an established global technology organization recognized for building complex, large-scale software platforms used by enterprise organizations worldwide. They are known for pioneering solutions that improve device performance, enhance diagnostics, and deliver deep analytics to help customers operate more efficiently. The team is expanding and seeking a Senior Software Developer who can contribute to next-generation features and drive innovation across a sophisticated suite of applications.

What We’re Looking For

You are a highly skilled, curious, and inventive software developer with strong communication and leadership abilities. You thrive in environments where you can explore new technologies, influence architectural direction, and collaborate closely with cross-functional teams.

In this role, you will help design and deliver advanced diagnostic, analytics, and monitoring features across a modern full-stack ecosystem. You will work at the intersection of enterprise mobility, cloud technologies, and data-driven insights—building solutions that directly improve real-world operational performance for global customers.

• Collaborate with internal and external stakeholders to translate architecture and system requirements into actionable development plans.

• Drive architectural decisions across full-stack applications—including UI, middleware, backend systems, and integrations with data analytics and business intelligence tools.

• Develop, enhance, and maintain scalable, secure, high-performance applications using C#, TypeScript, .NET, and Angular.

• Analyze customer needs and recommend strategic technical solutions that align with business objectives.

• Evaluate architectural changes and propose enhancements to improve scalability, maintainability, and performance.

• Mentor junior and intermediate developers, providing technical guidance and ensuring high-quality output.

• Serve as a Subject Matter Expert (SME) for one or more major system components.

• Stay current with emerging technologies and industry trends, applying best practices to code quality, performance, and security.

• Troubleshoot and resolve complex technical issues to maintain a productive development environment.

• Uphold and enforce coding standards to ensure maintainability and security across the codebase.

• Apply Artificial Intelligence (AI) or machine learning knowledge to design intelligent, data-driven features.

• Optimize application architecture for cloud-native environments.

• Experience with AWS or Azure is highly advantageous.

• Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field.

• 7+ years as a Full Stack Developer or Software Architect, with experience designing and delivering complex systems.

• Strong proficiency in C#, TypeScript, .NET, Angular, and modern architectural patterns.

• Excellent grasp of algorithms, data structures, system design, and clean coding principles.

• Hands-on experience mentoring developers and contributing to a collaborative engineering culture.

• Ability to influence product architecture and guide lifecycle planning with a forward-looking mindset.

• Strong communication, leadership, and interpersonal skills.

• Experience working with AI/ML libraries or implementing AI-driven features is an asset.

• Experience with cloud platforms (Azure preferred, including mapping services) is an advantage.

• Passion for building cutting-edge applications and solving complex technical challenges.

• Strong problem-solving mindset with the ability to navigate ambiguity and evolving requirements.

• Fast learner who adapts quickly to new technologies and continuously refines development practices.

Our client is a global leader in enterprise software solutions, trusted by large organizations across industries to manage, optimize, and secure mission-critical operations. Their platforms support tens of thousands of customers worldwide and are recognized for exceptional reliability, advanced analytics, and world-class support.