C/C++ Developer - 4G/5G Core Network

Brief DescriptionExperience: 5-15 years Work location: Trivandrum Contract: 11-month contract, renewable based on project requirements and performance. About the Role We are looking for an experienced C/C++ Developer with a strong foundation in 4G/5G Core Network technologies. The role involves building low-level components that sit close to the protocol and signalling layers, ensuring that control-plane and user-plane workflows behave as expected in real-world environments. You will contribute directly to the development lifecycle, collaborate with cross-functional teams, and help strengthen core network stability, performance, and standards compliance. Key Responsibilities Core Network Development

Design and develop C/C++ modules for 4G/5G core elements on Linux. Implement and optimize telecom protocols across signalling and data layers. Work with interfaces such as NGAP, S1AP, XnAP, Diameter, GTP, PFCP, HTTP2/SBI, SCTP, NAS, and SIP. Ensure alignment with industry specifications and maintain accurate behaviour across network scenarios.

Testing & Troubleshooting

Conduct unit, integration, and regression testing of core modules. Support analysis and resolution of issues raised during lab validation or live environment testing. Collaborate with teams handling adjacent nodes to ensure smooth interoperability.

Agile Collaboration & Delivery

Participate in daily stand-ups, sprint planning, and retrospectives. Work closely with architects, QA teams, and protocol specialists to ensure stable releases. Maintain clarity in communication and documentation across the development lifecycle.

Required Skills & Experience Programming & Systems Expertise

Strong hands-on experience in C/C++ development on Linux. Understanding of memory handling, multithreading, and performance-critical code paths. Familiarity with debugging tools, profiling utilities, and system-level troubleshooting.

4G/5G Core Network Knowledge

Solid grasp of core network functions and call flows (AMF, SMF, MME, SGW, PGW). Experience working with 3GPP standards and telecom protocol stacks. Practical exposure to control-plane and user-plane interactions.

Protocol-Level Experience

Working knowledge of one or more core signalling interfaces:NGAP, S1AP, XnAP, NASDiameter, GTP, PFCPSCTP, SIP, HTTP2/SBI Preferred Skills Exposure to SDN/NFV concepts, virtualized network functions, and cloud-native architectures. Familiarity with Kubernetes or containerized deployments. Experience with CI/CD workflows, automated testing, and build pipelines. Understanding of distributed systems or microservice design.

Soft Skills

Strong analytical thinking and problem-solving approach. Ability to understand complex network behaviour and reason through edge scenarios. Clear communication and willingness to collaborate closely with cross-functional teams. Commitment to responsible engineering and continuous learning.