Full Stack Engineer

Job Title: Senior/Principal Full Stack Software Engineer

Location: Markham, Ontario (Onsite – 4 days/week)

Contract Duration: 6-Month Initial Contract

Start Date: ASAP

Overview:

We are seeking a seasoned Senior Full Stack Developer to join our client’s engineering team in Markham, Ontario. This is a hands-on leadership role focused on building scalable, cloud-native enterprise applications. The ideal candidate will have deep experience in system architecture, full-stack development, and billing system integrations.

Key Responsibilities

• Lead full-stack development using NestJS, React, and TypeScript.
• Design and implement highly scalable APIs using industry best practices.
• Architect and implement cloud-native solutions on Azure, leveraging:
• Azure Container Apps
• Azure Service Bus
• Azure API Management (APIM)
• Azure SQL
• Cosmos DB
• NoSQL and Redis
• Develop and maintain microservices and event-driven architectures for distributed systems.
• Implement Infrastructure as Code (IaC) solutions using Bicep, Terraform, or similar tools.
• Build and maintain containerized applications using Docker.
• Implement and maintain CI/CD pipelines using GitHub Actions, Azure DevOps, or similar tools.
• Ensure scalability, performance, security, and observability across distributed systems.
• Build observable applications utilizing Application Insights, monitoring, telemetry, distributed tracing, and alerting frameworks.
• Collaborate closely with product managers, architects, and DevOps teams.
• Plan and manage code merges, branching strategies, releases, and production deployments.
• Utilize feature flags and modern deployment strategies to enable rapid, low-risk product releases.
• Mentor junior engineers and provide technical leadership across the team.
• Work effectively in a highly agile environment, adapting quickly to evolving business requirements and priorities.

Required Qualifications

• Minimum 10 years of experience in software engineering and system architecture.
• Proven experience with NestJS, React, and TypeScript.
• Experience building scalable APIs using Spring Boot and/or modern Node.js frameworks.
• Strong understanding of Azure cloud services, cloud-native architecture, and distributed system design.
• Hands-on experience with Azure Container Apps, APIM, Docker, and CI/CD pipelines.
• Experience with Infrastructure as Code (IaC), preferably using Bicep, Terraform, ARM Templates, or similar technologies.
• Strong knowledge of relational and NoSQL database design and optimization.
• Demonstrated experience with event-driven architectures and microservices.
• Strong sense of ownership and accountability with a focus on delivering production-ready software.
• Excellent communication skills with the ability to explain complex technical concepts and lead solution discussions.
• Strong analytical and problem-solving skills with experience troubleshooting complex production issues.

Nice to Have

• Experience integrating with CRM platforms.
• Prior work with event-driven systems and message queues.
• Knowledge of security best practices in cloud-native applications.
• Experience with Application Insights, Log Analytics, distributed tracing, dashboards, and telemetry-driven troubleshooting.
• Experience using Agile delivery tools such as Azure DevOps or Jira.
• Familiarity with TanStack (React Query/TanStack ecosystem).
• Experience creating technical design documents, architectural proposals, and solution-option analyses.
• Experience building rules engines, pricing engines, or complex business logic platforms.
• Experience leveraging AI-assisted development tools while following security and compliance best practices.