Senior Telecom Validation Engineer - 5G Core (SMF)
Confirmed on the employer's own hiring board on Nov 4, 2026. First seen by Alion on Nov 2, 2026.
Mavenir is building the future of networks and pioneering advanced technology, focusing on the vision of a single, software-based automated network that runs on any cloud. As the industry's only end-to-end, cloud-native network software provider, Mavenir is transforming the way the world connects, accelerating software network transformation for 250+ Communications Service Providers in over 120 countries, which serve more than 50% of the world’s subscribers.
Role Summary
Prepares test and diagnostic programs, designs test fixtures and equipment, and completes specifications and procedures for new products.Key Responsibilities
Responsible for participating in the evolution and execution of procedures for ensuring the quality of new features and releases of software products. Debugs software products through the use of systematic tests to develop, apply, and maintain quality standards for company products. Develops, modifies, and executes software test plans, automated scripts and programs for testing. Analyzes and writes test standards and procedures. Maintains documentation of test results to assist in debugging and modification of software. Analyzes test results to ensure existing functionality and recommends corrective action. Consults with development engineers in resolution of problems. Provides feedback in preparation of technical appraisals of programming languages, systems, and computation software.
Key Responsibilities
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
Job Requirements
SMF architecture and functions
PDU Session Establishment, Modification, Release
Network-triggered and UE-triggered procedures
UPF selection and traffic steering
Policy and charging concepts
Mobility and session continuity (SSC modes)
Network slicing (S-NSSAI, DNN)
2. Protocol Expertise
Strong understanding and troubleshooting capability for:
HTTP2 / SBI APIs
PFCP (N4 Interface)
NGAP (N2 Interface)
NAS messages
GTP-U
SCTP
Diameter (good to have for EPC background)
Job Families for Job Profiles
Software - Quality Assurance
Job Requirements
updated above
Accessibility
Mavenir is committed to working with and providing reasonable accommodation to individuals with physical and mental disabilities. If you require any assistance, please state in your application or contact your recruiter.
Mavenir is an Equal Employment Opportunity (EEO) employer and welcomes qualified applicants from around the world, regardlessof their ethnicity, gender, religion, nationality, age, disability, or other legally protected status.