Exciting new opportunities to develop, maintain and modernize CSCF (Call Session Control Function), a software-only core network application in the IP Multimedia Subsystem (IMS) responsible for SIP/SDP signaling, registration and session control. CSCF runs as an application on top of the Application Development Platform (ADP) and is delivered as a cloud-native for carrier-grade telecom networks.
By joining the team, you will work on CSCF application components such as SIP Stack, Diameter Stack, Event Dispatcher, Service Invocation, node-specific behavior and OAM integration. You will collaborate with global engineering teams to improve reliability, scalability, observability and service continuity across clustered deployments.
Your responsibilities include but not limited to the following:
• Under the guidance of senior engineers, be involved in the full Software Development Life Cycle for CSCF application components and microservices, from analysis and implementation to testing, delivery and maintenance.
• Contribute to the development and maintenance of features related to SIP/SDP and Diameter signalling, including routing, registration, service invocation.
• Write clean, maintainable and well-documented code; create unit or integration tests and participate in code reviews to promote engineering best practices.
• Continuously learn IMS, 3GPP/IETF telecom standards and cloud-native practices to improve CSCF quality, security and performance.
• A University Qualification in
Software Engineering or a related degree is required.
• Basic understanding of cloud-native technologies, microservices architecture and containerization, including Docker, Kubernetes and Helm.
• Good programming foundation in C++, with ability to use Python or Bash for automation, debugging and troubleshooting.
• Familiar with Linux environment, networking fundamentals and debugging of distributed systems.
• Willingness to learn IMS core network concepts and telecom signalling protocols such as SIP/SDP and Diameter.
• Understanding of software development practices such as Git, CI/CD, unit testing, code review and Agile methodologies such as Scrum or Kanban.
• Good analytical thinking, ownership mindset and ability to work collaboratively in a global team.
Preferred
• Exposure to SIP, Diameter, TCP, UDP, SCTP, DNS/ENUM or 3GPP/IETF standards is a plus.
• Good at problem-solving skills, strong communication abilities, and a collaborative mindset.
• Good at English communication and presentation abilities, both written and spoken.