Senior Telecom Validation Engineer - 5G Core (SMF)

Overview

Senior Telecom Validation Engineer responsible for validating and troubleshooting 5G Core network functions, with a focus on SMF, and for developing test automation and quality processes for new software releases.

What you'll do

• Validate 5G Core network functions with focus on SMF, AMF, UPF, NRF, and UDM.
• Execute and troubleshoot PDU Session, mobility, policy, and subscriber management call flows.
• Analyze NGAP, PFCP, HTTP2/SBI, NAS, and GTP-U traces for issue identification and RCA.
• Develop and maintain automation frameworks using Python and Robot Framework.
• Perform interoperability, resiliency, failover, and error injection testing.
• Investigate customer-reported issues and drive root cause analysis using logs and packet captures.
• Validate cloud-native deployments, upgrades, scaling, and Kubernetes-based CNF environments.
• Design test strategies, regression plans, and quality metrics for new feature releases.
• Collaborate with cross-functional teams to improve product quality.
• Develop, modify, and execute software test plans, automated scripts and programs for testing.
• Analyze and write test standards and procedures.
• Maintain documentation of test results to assist in debugging and modification of software.
• Analyze test results to ensure existing functionality and recommend corrective action.
• Consult with development engineers in resolution of problems.
• Provide feedback in preparation of technical appraisals of programming languages, systems, and computation software.

What you'll need

• SMF architecture and functions.
• Knowledge of PDU Session Establishment, Modification, and Release.
• Knowledge of network-triggered and UE-triggered procedures.
• Knowledge of UPF selection and traffic steering.
• Knowledge of policy and charging concepts.
• Knowledge of mobility and session continuity (SSC modes).
• Knowledge of network slicing (S-NSSAI, DNN).
• Strong understanding and troubleshooting capability for HTTP2 / SBI APIs.
• Strong understanding and troubleshooting capability for PFCP (N4 Interface).
• Strong understanding and troubleshooting capability for NGAP (N2 Interface).
• Strong understanding and troubleshooting capability for NAS messages.
• Strong understanding and troubleshooting capability for GTP-U.
• Strong understanding and troubleshooting capability for SCTP.

Nice to have

• Diameter (good to have for EPC background).

Details

• Location: Bangalore, India.