Senior Software Developer - Full Stack

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Ref: RQ11739 Contract – 11 Months (Extension Possible) Onsite – Toronto (222 Jarvis St. 5th Floor)

Posted Date: 2026-10-26

Location: Onsite – Toronto (222 Jarvis St. 5th Floor)

Public Sector Experience: Required – OPS / Public Sector

Contract End Date: 2027-09-28 *

Rate: $103/hour

Overview

The Government Services Integration Cluster (Ministry of Public and Business Service Delivery and Procurement) is seeking a Senior Software Developer – Full Stack to design, develop, integrate, and maintain enterprise platform capabilities across all application layers. Working alongside architects, product managers, UX designers, QA specialists, DevOps engineers, and ministry partners, the successful candidate will build reusable platform services that support multiple government programs while onboarding registries, permitting, payments, notifications, identity, and other business-facing functions. This is a technically hands-on leadership role requiring deep full-stack expertise and a commitment to secure, scalable, and maintainable software delivery.

Key Responsibilities

• Design, develop, and maintain frontend, backend, API, integration, workflow, middleware, and data-access components using approved patterns and standards
• Build and maintain Java-based microservices, REST APIs, RESTful web services, and reusable platform services supporting multiple government programs
• Translate approved technical specifications into working, tested, secure, and maintainable enterprise platform applications
• Develop detailed programming specifications; write, compile, debug, document, and unit test application code
• Develop and maintain database objects, queries, data transformations, conversion routines, and integration components using relational and hierarchical database technologies
• Implement security gateways and protocols including identity, access management, JSON Web Tokens, OAuth 2.0, SSL certificates, and secure communications
• Create and maintain automated unit, integration, API, database, and user-interface tests
• Participate in design walkthroughs, impact assessments, code reviews, estimation, backlog refinement, sprint planning, and technical decision-making
• Review, analyze, and modify build, configuration, and deployment scripts including coding, testing, and debugging
• Resolve and troubleshoot technical problems arising during development, implementation, migration, deployment, and production operations
• Provide post-implementation support, resolve production issues, and improve application performance, reliability, and maintainability
• Prepare and maintain user, system, technical, deployment, and support documentation
  
  

Must-Have Requirements

• 10+ years of experience designing and developing large-scale, multi-client web applications, or equivalent depth of senior development experience
• Extensive hands-on Java development experience with Oracle, SQL, or comparable relational database technologies
• Significant experience designing and developing REST APIs and RESTful web services
• Proven experience with microservice architecture and applying core architecture principles to improve extensibility and maintainability
• Experience with object-oriented coding practices, current design patterns, refactoring, clean code, and structured development methodologies
• Experience with relational and hierarchical database technologies, query languages, SQL tuning, and data-access components
• Experience implementing security gateways and protocols including JSON Web Tokens, OAuth 2.0, and SSL certificates
• Experience with middleware, gateways, communications protocols, enterprise integrations, and data migration or conversion activities
• Experience using Azure DevOps or comparable tools for work management, source control, build, testing, and deployment pipelines
• Experience translating technical specifications into working applications using Agile delivery approaches and automated testing practices
• Experience conducting design walkthroughs, code reviews, impact assessments, and technical troubleshooting
• Experience providing implementation, conversion, migration, and post-implementation support for complex applications
  
  

Nice-to-Have Skills

• Experience eliciting and documenting requirements from diverse business stakeholders, subject-matter experts, and architects
• Strong written and verbal communication, analytical, and systematic problem-solving skills
• Demonstrated ability to lead or participate in design walkthroughs and work effectively with cross-functional technical and business teams
• Experience working within Ontario Public Sector or comparable large-scale government technology environments
  
  

Work Environment

This is a fully onsite role based at 222 Jarvis St., 5th Floor, Toronto, Ontario, with a 5-days-per-week in-office requirement. No security clearance is required. The team follows Agile delivery methodologies and collaborates closely with architects, UX designers, DevOps engineers, QA specialists, and ministry partners throughout the software development lifecycle.

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• Final role details, responsibilities, and terms will be confirmed with shortlisted candidates. Compensation may vary based on experience. Errors and omissions excepted.