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Added 2 months ago
Senior IT Security Advisor (Application Security)
goeasy Ltd.
Mississauga, ON
Full-time
The Senior IT Security Advisor, Application Security plays a critical role in protecting and enabling goeasy's technology landscape. As a senior security expert, you'll lead security…
Added 2 months ago
Sr Director, App Delivery
CIBC
Toronto, ON · Greater Toronto Area, Canada
Full-time
As the Senior Director of Application Delivery, you will oversee the strategy, execution, and delivery of large-scale technology initiatives across the Commercial and Corporate Banking…
Added 1 month ago
Senior Android Developer
Taiv
Winnipeg, MB
Full-time
We are looking for a Senior Android Developer to join our growing team!
Added 1 month ago
Senior Back End Engineer Java/OLAP
Prophix
Remote, Canada
Full-time · Remote
…possible for more than 3,000 finance teams worldwide. As a Senior Back-End Engineer specializing in Java and OLAP, you will own the Java side of that engine - designing, optimizing, and…
Added 1 month ago
Sr. Software Engineer (AI/ML)
Blackpoint Cyber
Remote, Canada
$150,000 to $180,000 CAD / year
Full-time · Remote
…AI/ML to accelerate Blackpoint Cyber's ML/AI capability. As a Senior Software Engineer on this team, you'll own back-end systems and data/ML pipelines end-to-end, work cross-functionally…
Added 17 days ago
Senior Software Engineer, Wallet
Robinhood
Toronto, ON
As a Senior Software Developer, you’ll build and own the backend services, infrastructure, and data systems that support Robinhood Wallet products. You will develop reliable and secure…
Added 1 month ago
Senior FullStack Developer - Java/Angular
Intact FC
Montreal, QC
Full-time
Web Dev: Angular – JAVA – Spring Boot + Spring Cloud - MongoDB / Oracle / SOAP
Added 1 month ago
Software Developer II (Technical Writing)
Warner Bros. Discovery
Ottawa, ON
Full-time
Apply your proficiency in JavaScript, Java, and Python to contribute to software development when needed.
Added 1 month ago
Software Developer
OceanMD
Toronto, ON
Full-time
Reporting to the Vice President, Research and Development, we are hiring a Software Developer. As our new Software Developer, you will build and enhance the health technology that helps…
Added 2 months ago
Senior Infrastructure Consultant
Kumaran Systems
Toronto, ON
Full-time
Deploy and troubleshoot Java/J2EE applications on Oracle WebLogic Server.
Added 2 months ago
Microsoft D365 CE Managed Services Senior Consultant
RSM Canada
Calgary, Alberta
Full-time
Added 2 months ago
Senior Engineer I
Groupe Dynamite
Mont-Royal, Quebec
Full-time
…a modern E-commerce mobile app ecosystem. As an experienced Senior Engineer, you will lead feature development, mentor junior engineers, and influence architecture for mission-critical…
Added 1 month ago
Senior Software Developer
OceanMD
Toronto, ON
Full-time
Reporting to the Vice President, Research and Development, we are hiring a Senior Software Developer to join our collaborative engineering team. As our new Senior Software Developer, you…
Added 3 months ago
Sr. Software Developer - Hybrid/Secret Cleared
The Source Staffing
ON · Ottawa West, Ontario
Full-time
Senior Software Developer - Hybrid/Secret Cleared 90-110k
Added 1 month ago
Quality Assurance Analyst, Investly
Fidelity Canada
Toronto, ON
Full-time
…presenting recommendations / solutions to business partners and senior…
Added 20 days ago
Senior Software Developer, Workday Integrations & Extend
Royal Bank of Canada
Toronto, ON
Full-time
As a Senior Software Developer, Workday Integrations & Extend, you will lead the technical design, development, and implementation of Workday solutions to meet complex HCM program…
Added 1 month ago
Senior Software Developer, Workday Integrations & Extend
RBC
Toronto, ON
Full-time
As a Senior Software Developer, Workday Integrations & Extend, you will lead the technical design, development, and implementation of Workday solutions to meet complex HCM program…
Added 1 month ago
Senior Automation Developer - Assistant Vice President
Citi
Mississauga, ON
Full-time
We are seeking a highly skilled Senior Automation Developer for a fully hands-on, programmatic engineering role dedicated to architecting, refactoring, and maintaining scalable, distributed…
Added 1 month ago
Data Scientist
Meridian Credit Union
Toronto, ON
Full-time
Develop GenAI and LLM models. Get direction from and technical guidance from more senior members of the team
Added 1 month ago
Senior Principal Site Reliability Engineer
Questrade Financial Group
Toronto, ON
We’re looking for our next Senior Principal Site Reliability Engineer. Could It Be You?
Added 2 months ago
Software Sr Developer
Zimmer Biomet
Montreal, Quebec
Full-time
…les équipes et les clients. En tant que développeur logiciel senior, vous participerez activement, au sein de l’équipe de développement du système de portail, à toutes les étapes du…
Added 2 months ago
Senior Software Engineer - Mobile
Roadpost
Etobicoke, Ontario
Full-time
Senior Mobile Depth. 7+ years of professional software engineering experience, with production-grade depth in at least one native mobile platform – iOS (Swift, SwiftUI), or Android (Kotlin,…
Added 18 days ago
AI and Data - Manager - AI Engineer
EY
Toronto, ON
Advanced object-oriented coding skills in Python for production-level codebases. Familiarity with Java, TypeScript/JavaScript is a plus.
Added 1 month ago
Java Full Stack Developer - React JS - Assistant Vice President
Citi
Mississauga, ON
Full-time
The position is for a senior full-stack developer with 6-8 years of experience, specializing in building enterprise-scale applications. This role is suited for a strong React-focused full…
Added 4 months ago
Java Software Engineer
Synechron
Calgary, Alberta
$100,000 to $110,000 CAD / year
Full-time
We are seeking a highly skilled Senior Core Java Developer with extensive experience in multithreading, collections, data structures, and banking domain expertise. The ideal candidate will…

The Source Staffing

Sr. Software Developer - Hybrid/Secret Cleared

ON, Canada
Ottawa West, ON, Canada

Job type: Full-time
Experience: Minimum 10 years of software development experience
Posting language: English
Posted: Jun 17, 2026

Apply About employer

Applications open in a new tab.

Original job description

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

Apply About employer

More about this job

Responsibilities

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.

Requirements

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.

Skills

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

Benefits

Full Benefits
4 Weeks' Vacation

Visa sponsorship

Not detected in the job text

Keywords

Software Developer
Defence
Secret Cleared
Java
C#
LC4ISR
DND
Canadian Armed Forces
Agile
SAFe
System Integration
Command-and-control
C2
NATO standards
STANAG 4586
Security Clearance
Software Architecture
Debugging
Kanata
Government
Military
Tactical software
Verification
Validation
Interoperability
Automation
Monitoring
Secure development
Technical documentation
Engineering

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