Sr. Software Developer - Hybrid/Secret Cleared

Senior Software Developer - Hybrid/Secret Cleared 90-110k About the Opportunity The Source Staffing is supporting a leading Canadian defence technology organization in hiring an Intermediate Software Developer / Engineer to join a mission-critical program supporting the Department of National Defence (DND). This role is ideal for Secret cleared developers in the Ottawa region who are looking to apply their skills to operationally relevant systems used by the Canadian Armed Forces, specifically LC4ISR. You’ll be contributing directly to tactical command-and-control capabilities in a highly collaborative, agile delivery environment. Why This Role Stands Out Work on active DND programs with real operational impact Join an internal team deeply embedded in Canada’s defence and security ecosystem Stable, long-term program work (not short-term project churn) Collaborate with company colleagues; experienced engineers, CAF stakeholders, and system integrators The Role You will contribute to the design, development, and integration of tactical software applications, ensuring they meet the performance, reliability, and security requirements expected in defence environments. This is a hands-on development role with exposure to system-level thinking, integration challenges, and real-world deployment considerations. Please note that while the need to apply is urgent, and initial confirmation may come within a week, the actual start date may likely be 3-5 weeks. Key Responsibilities Design, develop, and enhance software systems within an LC4ISR framework Support system integration, verification, and validation activities Analyze and resolve system-level issues, including performance and interoperability challenges Collaborate with internal teams and external stakeholders to ensure system reliability and maintainability Conduct technical investigations into third-party software and integrations Review and contribute to technical documentation (interfaces, components, specifications) Support integration testing and evaluation activities in controlled environments Contribute within a SAFe Agile delivery model Requirements Required Qualifications Must-Have Active SECRET security clearance (mandatory – must be valid and transferable) Minimum ​10 years of software development experience Proficiency in Java and or C# Experience working in secure or regulated environments (defence, public sector, or similar) Solid understanding of software architecture, integration, and debugging Assets Exposure to NATO standards or STANAG 4586 Previous work on command-and-control (C2) systems or defence-related platforms Education Degree in Computer Science, Engineering, IT, Science or related field Equivalent hands-on experience in defence or secure environments will be considered Core Competencies Strong problem-solving and analytical thinking Ability to work effectively in cleared, multi-stakeholder environments Clear and professional communication skills Experience with automation, monitoring, and secure development practices Work Environment Based in Kanata, ON, Hybrid, 4 days on-site (flexible) Collaboration with internal colleagues, government, military, and contractor teams Casual How to Apply If you are a SECRET-cleared software developer in the Ottawa area looking for meaningful, long-term work in the defence space, we encourage you to apply for this or for future consideration Submit your resume to The Source Staffing at jobs@thesourcestaffing. com Benefits Full Benefits; 4 weeks' Vacation

You will design, develop, and integrate tactical software applications within an LC4ISR framework to meet defence performance and security requirements. Additionally, you will support system integration, verification, and validation activities while collaborating with internal teams and external stakeholders.

Candidates must possess an active SECRET security clearance and at least 10 years of software development experience. Proficiency in Java or C# and experience working in secure or regulated environments are mandatory requirements.

• Full Benefits • 4 Weeks' Vacation

• AgilePreferred
• JavaPreferred
• C++Preferred

Identified from the job description. Confirm important requirements above.

• Java
• C#
• Software Architecture
• System Integration
• Debugging
• Agile
• SAFe
• Command-and-control systems
• LC4ISR
• Security clearance
• Technical documentation
• Verification and validation
• Performance analysis
• Interoperability
• Automation
• Monitoring
• Secret Clearance
• Analytical Thinking
• SAFe Agile
• Agile Methodology
• C# (Programming Language)
• Integration Testing
• Computer Science
• Problem Solving
• Maintainability
• Security Requirements Analysis
• Software Systems
• Verification And Validation
• Systems Integration
• Technical Documentation
• Investigation
• Reliability

• Software
• Technology
• Government & Public Sector
• Engineering
• Security & Safety
• Software Developer
• Software Developer / Engineer
• Software Developers

Minimum education

Bachelor’s degree

Minimum experience

10+ years

Posting language

English

Working hours

40 hours per week

Office presence

4 days per week