About the role
Position Overview
Calian Operational and Training Technologies Solutions (COTTS), is actively seeking a Senior Java Developer to join our Operations and Training Technology team in a full-time employee role. This position requires deep expertise in Java-based systems, with hands-on experience in audio codec integration, VOIP/ROIP protocols, and mission-critical communication systems.
Location
Ottawa, ON
Job Type
Full Time
You will play a key role in designing, developing, and enhancing applications that support communication platforms for military and emergency services. Your work will directly impact the reliability, security, and performance of systems operating under demanding and high-stakes conditions.
Responsibilities
- Design, develop, and maintain Java applications for VOIP/ROIP and digital communication systems
- Integrate and optimize audio codecs (e.g., Opus, AAC)
- Implement and support SIP, RTP, and other VOIP/ROIP protocols for real-time communication
- Collaborate with cross-functional teams to design secure, fault-tolerant communication solutions
- Develop and implement features to enable interoperability with military communication systems
- Ensure scalability, low-latency performance, and high availability of communication services
- Participate in code reviews, architecture discussions, and technical planning activities
- Engage with customers to gather requirements, demonstrate features, and provide product support
Qualifications
- Bachelor’s degree in Computer Science, Engineering, or a related field
- 10+ years of experience in Java development
- Experience developing distributed client/server environments
- In-depth knowledge of VOIP/ROIP technologies (e.g., SIP, RTP, SRTP)
- Hands-on experience with audio codecs and real-time media processing
- Familiarity with radio systems, digital signal processing (DSP), and tactical communication protocols
- Strong understanding of network programming and low-level socket communication
- Excellent problem-solving, debugging, and performance optimization skills
Preferred Qualifications
- Experience developing communication software for military, defense, or emergency services
- Familiarity with Open SDR (software-defined radio)
Additional Requirements
- Must be able to work on site
- You will be able to obtain a Government Security Clearance at the Secret Level
Security clearances
- A security clearance and/or vulnerable sector screening might be required for this position.
- Our recruiter will walk you through the security clearance requirementand process.
About Calian GNSS
Calian GNSS is a leading producer of high-performance GNSS antennas and related products that are focused on the requirements for precision and multi-constellational GNSS receivers. We offer a wide range of high-performance products in many formats to specifically address the requirements of most GNSS applications, including Globalstar and Iridium SATCOM. We pride ourselves in producing the very best antennas available in the mid-range market segment.
Calian GNSS also produces a comprehensive range of end-to-end telematics systems for the two way radio systems, most particularly for Motorola MOTOTRBO™ products, Tait DMR and P25 systems and Kenwood Nexedge™ products.
The Calian GNSS team is composed of seasoned professionals with a long history in GNSS antennas and RF product radio systems. Innovation is a core value in our corporate culture.
Tallysman was acquired by Calian Group Ltd. in September 2020.
About the role
Position Overview
Calian Operational and Training Technologies Solutions (COTTS), is actively seeking a Senior Java Developer to join our Operations and Training Technology team in a full-time employee role. This position requires deep expertise in Java-based systems, with hands-on experience in audio codec integration, VOIP/ROIP protocols, and mission-critical communication systems.
Location
Ottawa, ON
Job Type
Full Time
You will play a key role in designing, developing, and enhancing applications that support communication platforms for military and emergency services. Your work will directly impact the reliability, security, and performance of systems operating under demanding and high-stakes conditions.
Responsibilities
- Design, develop, and maintain Java applications for VOIP/ROIP and digital communication systems
- Integrate and optimize audio codecs (e.g., Opus, AAC)
- Implement and support SIP, RTP, and other VOIP/ROIP protocols for real-time communication
- Collaborate with cross-functional teams to design secure, fault-tolerant communication solutions
- Develop and implement features to enable interoperability with military communication systems
- Ensure scalability, low-latency performance, and high availability of communication services
- Participate in code reviews, architecture discussions, and technical planning activities
- Engage with customers to gather requirements, demonstrate features, and provide product support
Qualifications
- Bachelor’s degree in Computer Science, Engineering, or a related field
- 10+ years of experience in Java development
- Experience developing distributed client/server environments
- In-depth knowledge of VOIP/ROIP technologies (e.g., SIP, RTP, SRTP)
- Hands-on experience with audio codecs and real-time media processing
- Familiarity with radio systems, digital signal processing (DSP), and tactical communication protocols
- Strong understanding of network programming and low-level socket communication
- Excellent problem-solving, debugging, and performance optimization skills
Preferred Qualifications
- Experience developing communication software for military, defense, or emergency services
- Familiarity with Open SDR (software-defined radio)
Additional Requirements
- Must be able to work on site
- You will be able to obtain a Government Security Clearance at the Secret Level
Security clearances
- A security clearance and/or vulnerable sector screening might be required for this position.
- Our recruiter will walk you through the security clearance requirementand process.
About Calian GNSS
Calian GNSS is a leading producer of high-performance GNSS antennas and related products that are focused on the requirements for precision and multi-constellational GNSS receivers. We offer a wide range of high-performance products in many formats to specifically address the requirements of most GNSS applications, including Globalstar and Iridium SATCOM. We pride ourselves in producing the very best antennas available in the mid-range market segment.
Calian GNSS also produces a comprehensive range of end-to-end telematics systems for the two way radio systems, most particularly for Motorola MOTOTRBO™ products, Tait DMR and P25 systems and Kenwood Nexedge™ products.
The Calian GNSS team is composed of seasoned professionals with a long history in GNSS antennas and RF product radio systems. Innovation is a core value in our corporate culture.
Tallysman was acquired by Calian Group Ltd. in September 2020.