Part Time Senior Software Engineer Jobs in Ontario

ADGA Group is a Canadian-owned defence and security company that provides integrated, mission-critical technical solutions to Government and industry, specializing in C5ISRT, simulation and training, cyber and infrastructure security, and program delivery. With nearly 60 years of experience, ADGA supports federal clients and Canada’s intelligence and enforcement agencies through embedded teams, advisory services, and full project execution, applying deep operational expertise and innovation to strengthen national safety, resilience, and sovereignty. Guided by a strong social mandate, the company creates meaningful employment for veterans of the CAF and RCMP and other professionals committed to public service, while fostering a safe, inclusive, and agile workplace that supports career development, professional growth, and impactful work across Canada.

We are seeking a Full-Stack Software Developer to support the ongoing development, enhancement, and maintenance of a mission-critical system operating across secure Canadian Forces networks. This role focuses on .NET and Angular-based application development, performance optimization, and secure deployment practices within a controlled environment. The successful candidate will contribute to both feature development and system stability, working within an Agile DevOps framework. 

This is a proactive recruitment initiative, with potential start dates in the coming weeks or months, contingent on contract award.

Key Responsibilities 

• Develop and enhance system features using established architecture and design patterns  
• Review software requirements, identify gaps, and recommend optimal technical solutions  
• Troubleshoot and resolve complex system and application issues  
• Analyze, validate, and test code against defined requirements  
• Fix defects and implement performance improvements across the platform  
• Design and implement deployment strategies for secure (CF) network environments  
• Provide technical support and respond to user inquiries and issues  
• Diagnose software and hardware problems and advise technical leadership  
• Configure, maintain, and optimize Azure DevOps environments, including CI/CD pipelines  
• Contribute to system architecture improvements and scalability planning  

Technical Environment 

• Frontend: Angular  
• Backend: C# (.NET Framework), REST APIs  
• Databases & Search: MongoDB, Solr  
• Messaging & Real-Time: RabbitMQ, SignalR  
• DevOps & Tools: Azure DevOps (CI/CD pipelines), Azure Portal, VS Code, Studio 3T  
• Methodology: Agile (customized processes)  
• Other Tools: Microsoft Office Suite  

• 5+ years experience as a Software Developer 
• College diploma or Bachelor’s degree in Computer Science, Computer Engineering, IT, or related field  
• Strong hands-on experience with:  
  • C# / .NET Framework  
  • Angular (front-end development)  
  • MongoDB  
  • Azure DevOps (Agile, CI/CD pipelines)  
• Experience developing and maintaining RESTful APIs  
• Experience working in secure or enterprise environments  
• Ability to troubleshoot, debug, and optimize complex systems  

Asset Qualifications 

• Experience installing, maintaining, and upgrading server operating systems  
• Familiarity with distributed systems and messaging technologies (e.g., RabbitMQ)  
• Experience with real-time communication frameworks (e.g., SignalR)  
• Exposure to search platforms (e.g., Solr)  
• Experience working within government or defence environments 

• Must currently hold or be eligible to obtain and maintain a Secret (Level II) Canadian Federal Government Security clearance and Controlled Goods clearance

If you require accommodations during any stage of the application or interview process, please let us know. We are happy to work with you to meet your needs.

*Our recruitment systems include artificial intelligence–enabled tools; however, AI is not used to screen, evaluate, or make decisions about applicants for this role.

*Unless otherwise stated, all job postings reflect a current vacancy at the time of publication.

Work-Life Balance  

We strongly support a healthy and productive work-life balance. This starts with a flexible approach to work, and policies designed to support employees through their day-to-day routines and major life events. For example, we offer a Maternity/Parental Top-Up (up to 52 weeks) and a Reservist Leave Top-Up (up to 180 days). 

Belong@ADGA  

ADGA continuously strives to integrate advanced Diversity, Equity & Inclusion (DEI) approaches and practices into our work culture. Our employee-based DEI Committee explores activities and invites discussions that foster an environment where all employees feel valued, respected, and heard.

Compensation  

Above and beyond our commitment to offer a competitive base salary, ADGA has a company-wide profit-sharing plan for all full-time and part-time employees.

Comprehensive Benefits and Total Rewards  

We offer a comprehensive benefit program, providing employees with the choice between base or enhanced plans. Depending on the plan, ADGA pays for Health & Dental, a Health Spending Account, Short-Term Disability, an Employee Assistance Program, and a Telemedicine service. Also offered: discounts on gym memberships, 5,000+ perks through Perkoplis, a Deferred Profit Sharing Plan, and access to a wide range of other employee-centric services and savings programs.