Intern Full Stack Software Developer Jobs in Hamilton, ON

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 with strong Java and CMS (Liferay) experience to support the development, upgrade, and sustainment of Command View (CV/UCV) applications across classified and unclassified environments. 

This role focuses on end-to-end development, including front-end, back-end, and database layers, as well as system configuration, troubleshooting, and documentation within a secure, mission-critical setting. The successful candidate will also play a key role in knowledge transfer and operational standardization. 

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

Key Responsibilities 

Full-Stack Development 

• Design, develop, and maintain full-stack CMS-based applications (front-end, back-end, and database)  
• Develop custom modules for Liferay (Portal and DXP) using Java  
• Build and enhance user-facing features using JavaScript (ES5/ES6+), HTML, CSS, and Node.js  
• Integrate and manage Oracle and PostgreSQL databases  

System Maintenance & Support 

• Support the upgrade, configuration, and troubleshooting of CV (Classified) and UCV (Unclassified) environments  
• Diagnose and resolve application defects, performance issues, and system bugs  
• Perform testing and validation to ensure accuracy and completeness of applications  

DevOps & Development Practices 

• Use Azure DevOps for source control, versioning, branching, and CI/CD processes  
• Maintain structured development workflows using Git and Agile methodologies  
• Support deployment activities within secure, closed network environments  

Documentation & Knowledge Transfer 

• Develop and maintain technical documentation, SOPs, and deployment procedures  
• Document processes with clear steps and supporting artifacts (e.g., screenshots)  
• Deliver training sessions to users and internal teams  
• Provide ongoing knowledge sharing and maintain detailed development records  

Collaboration & Reporting 

• Provide regular updates to stakeholders through reports, demos, and status updates  
• Work closely with technical teams to ensure alignment on architecture and delivery  

Technical Environment 

• CMS Platform: Liferay 6.2 Portal, Liferay 7.4 DXP  
• Languages: Java, JavaScript (ES5/ES6+), HTML, CSS, Node.js  
• Templating: FreeMarker (FTL)  
• Databases: Oracle, PostgreSQL  
• Web & Middleware: Apache Web Server, Apache Tomcat  
• Operating Systems: Linux (RHEL, Alma Linux, Ubuntu)  
• Tools: Azure DevOps, Git, Eclipse, VS Code, SQL Developer  
• Scripting: Bash, PowerShell  

• 5–10+ years of relevant software development experience  
• College diploma or University degree in computer science, Engineering, IT, or related discipline  
• Minimum 5 years of Linux experience (building, configuring, administering servers) within the last 10 years  
• Strong experience in full-stack development within CMS platforms  
• Hands-on experience with:  
  • Java (JRE/JDK) and backend development  
  • Liferay (Portal and/or DXP) customization  
  • JavaScript, HTML, CSS, Node.js  
  • Database development (Oracle/PostgreSQL)  
• Experience with Azure DevOps and Agile development practices  
• Experience with testing, debugging, and bug resolution  
• Experience administering and maintaining Linux environments (RHEL, Alma, Ubuntu)  
• Experience with scripting (Bash, PowerShell) for automation  
• Experience working in secure, government, or defence environments  
• Strong documentation and training delivery experience  

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