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Randstad Logo Randstad · IT - Software Development

Senior Full Stack Developer

Canada, Toronto · Job Posted June 09, 2026
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Job Description

We are seeking a highly accomplished and multi-faceted Senior Full Stack Developer for an enterprise-level contract opportunity based in Toronto. In this role, you will lead development activities across the entire technology stack, specializing in building modern web applications, progressive mobile solutions, and high-performance cloud data architectures. As a senior technical leader, you will bridge the gap between frontend user interfaces and complex backend cloud services. Operating entirely onsite, you will take ownership of developing public-facing web channels, designing secure database architectures, and engineering optimized data pipelines. This role is ideal for a self-starter who excels at troubleshooting complex issues and independently delivering scalable, high-quality cloud solutions.

Job Responsibility

  • Develop, debug, and maintain high-performance, secure web applications utilizing modern .NET and frontend architecture patterns
  • Design and deploy Progressive Web Applications (PWAs) to optimize digital service delivery channels
  • Write clean, maintainable, and highly efficient script files to execute data processing, automation, and backend infrastructure tasks
  • Design and optimize data storage solutions, establishing secure connectivity with relational systems and advanced NoSQL data stores
  • Build, tune, and manage high-throughput cloud data pipelines to support large-scale data acquisition, processing, and analysis workloads
  • Ensure cloud architectures are configured for maximum reliability and scalability, utilizing cloud diagnostics to monitor stack health
  • Participate in building robust DevOps deployment pipelines and refining automated CI/CD release processes
  • Participate in rigorous peer code reviews to enforce established engineering standards, security best practices, and compliance controls
  • Triage and resolve complex application bottlenecks, data sync conflicts, and performance issues across both development and production environments
  • Act as a core technical liaison, collaborating with cross-functional squads to translate requirements into deployed technical assets

Requirements

  • 5+ years of professional full-stack development experience utilizing Microsoft .NET (C#) web architectures
  • Direct, hands-on experience building applications with .NET 9 (ASP.NET MVC and Blazor WebAssembly standalone) alongside relational and NoSQL frameworks
  • High proficiency in Python and JavaScript for executing advanced web application logic, data transformations, and automation
  • Deep structural understanding and practical experience architecting solutions on the Azure Cloud platform
  • 2+ years of dedicated experience building or optimizing cloud-based big data pipelines and distributed computing workloads
  • Advanced Cloud Infrastructure: Direct experience working with advanced cloud data integration suites, monitoring frameworks, and automated computation services
  • Modern Database Connectors: Hands-on familiarity implementing specific enterprise data clients, including modern Cosmos DB and SQL data libraries
  • Mobile Deployment: Familiarity with cross-platform mobile frameworks (such as .NET MAUI) and deploying applications to official application storefronts
  • Accessibility Compliance: Functional working knowledge of building digital products that conform to strict digital web accessibility standards
  • Independent Execution: Proven capability to operate with absolute autonomy, demonstrating strong personal initiative and lifecycle self-management
  • Performance Tuning: Exceptional problem-solving skills to troubleshoot complex stack defects and optimize databases or application code for maximum scale
  • Communication Excellence: Outstanding written and verbal communication skills, with polished ease when presenting complex technical concepts to non-technical business line managers

Nice to have

  • Advanced Cloud Infrastructure: Direct experience working with advanced cloud data integration suites, monitoring frameworks, and automated computation services
  • Modern Database Connectors: Hands-on familiarity implementing specific enterprise data clients, including modern Cosmos DB and SQL data libraries
  • Mobile Deployment: Familiarity with cross-platform mobile frameworks (such as .NET MAUI) and deploying applications to official application storefronts
  • Accessibility Compliance: Functional working knowledge of building digital products that conform to strict digital web accessibility standards

What we offer

  • Modern Tech Stack: Work directly with cutting-edge frameworks including .NET 9, ASP.NET MVC, and Blazor WebAssembly
  • Cloud & Big Data Depth: Gain enterprise experience building public-facing portals integrated with Azure Cosmos DB and Databricks data lakes
  • Full-Stack Ownership: Lead end-to-end development, from designing responsive mobile web views to engineering robust backend automation pipelines
  • Collaborative Onsite Culture: Partner closely with cross-functional engineering, DevOps, and database teams inside a high-energy professional workspace
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