About the Role

Location: Trivandrum (Onsite/Hybrid)

11-month contract, renewable based on project requirements and performance. 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, NAS
• Diameter, GTP, PFCP
• SCTP, SIP, HTTP2/SBI

Preferred Qualifications

• 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.

Equal Opportunity Statement

• We value diversity and inclusion. As an equal opportunity employer, we welcome applicants from all backgrounds and walks of life.

Security & Confidentiality Statement

• This role may involve access to sensitive business information. The selected candidate is expected to follow internal information security policies and maintain strict confidentiality when handling proprietary or confidential data.