Sr. Java Developer VOIP/SIP Solutions

Industry Professionals; Montreal (administrative region); On-site; CAD 100,000 - 120,000; Full time

Job summary

A technology leader in emergency communications is looking for a Senior Java Developer to create and maintain VOIP/SIP solutions. This role requires 8+ years of experience in software development, particularly in Java. The chosen candidate will work with cross-functional teams to deliver critical systems for emergency response. A Bachelor's degree in Computer Science or Software Engineering is essential. The position is hybrid based in Montreal, offering a competitive salary of CAD $100,000 to $120,000.

Qualifications

• 8+ years of professional software development experience.
• Strong experience in Java with solid knowledge of the full SDLC.
• Deep understanding of VOIP and SIP protocol development.

Responsibilities

• Design, develop, and maintain software applications for emergency response systems.
• Implement and enhance VOIP/SIP communication protocols.
• Collaborate with product managers and QA to align on goals.

Skills

Java

VOIP and SIP protocol

Linux environments

Agile/Scrum

Effective communication

Education

Bachelor's degree in Computer Science or Software Engineering

Tools

Spring Boot

Git

Oracle

Job description

About the job Sr. Java Developer VOIP/SIP Solutions

Senior Java Developer VOIP/SIP Solutions
Location: Hybrid Montreal, QC, Canada
Industry: Emergency Communications & Telecommunications Software
Compensation: CAD $100,000 $120,000
Application Deadline: June 20, 2025

We are recruiting on behalf of a technology leader in emergency response and telecommunications, developing next-generation 911 call-handling and VOIP solutions. Their software is used in mission‑critical environments where accuracy, speed, and reliability save lives. Based in Montreal, this organization is seeking an experienced Senior Software Developer (Java) to join their expanding engineering team.

Must-Have Skills & Experience:

• 8+ years of professional software development experience (5+ is the minimum acceptable)
• Strong experience in Java, with solid knowledge of the full SDLC
• Deep understanding of VOIP and SIP protocol development, including call flow logic
• Previous experience working on 911 systems or emergency call‑routing platforms
• Comfortable working in Linux environments
• Familiarity with Agile/Scrum methodologies and version control systems (e.g., Git)
• Effective communication skills and experience in cross‑functional teams

Preferred Skills:

• Experience with Spring Boot, .NET, React, or Angular
• Knowledge of databases such as Oracle, SQL, or NoSQL
• Exposure to cloud platforms (Azure, AWS)
• Familiarity with Infrastructure-as-Code tools like Terraform
• Background in telecommunications or public safety systems

Qualifications:

• Bachelors degree in Computer Science, Software Engineering, or equivalent professional experience
• Design, develop, and maintain software applications for emergency response systems
• Implement and enhance VOIP/SIP communication protocols and call routing logic
• Collaborate with product managers, designers, and QA to align on technical and functional goals
• Write clean, maintainable code with proper documentation
• Develop unit and integration tests and support QA with troubleshooting and defect resolution
• Use Git and modern development tools to manage codebase effectively