5G Core Network Engineer

Randstad Digital; Bengaluru; On-site; INR 1,500,000 - 2,100,000; Full time

Job summary

Randstad Digital is seeking a seasoned 5G Core Network Engineer with 8+ years of telecom experience to lead AMF/SMF management and SBIs within a cloud-native environment. The role emphasizes 3GPP standards, roaming, and interworking across core network functions.

The candidate will optimize performance, troubleshoot complex 5G core issues, and collaborate with cross-functional teams to ensure robust, scalable network services in Bengaluru and on-premise deployments.

Qualifications

• Over 8+ years of expertise in engineering for 5G and 4G core nodes (AMF, SMF, UPF, CUPS, MME, DNS, NRF).
• Experience with 3GPP TS 23.501 and related 3GPP specifications for 5G core network functions.
• Proficiency in managing service-based interfaces (SBI) and protocols such as HTTP/2 and NGAP.
• Familiarity with session management, mobility management, and policy control in 5G networks.
• Experience with roaming scenarios and interworking between home and visited SMFs.

Responsibilities

• Manage AMF interfaces including N1, N2, N8, N11, N14, N15, N26, and others as per 3GPP specifications.
• Ensure compliance with 3GPP standards and maintain performance enhancements for AMF.
• Interface with other network functions such as SMF, PCF, NRF, UDM, and AUSF via SBI.
• Handle connectivity and mobility management requests from UE and gNB.
• Support event subscription handling, including UE location reporting to SMF.

Skills

5G core

AMF knowledge

Service-based interfaces

HTTP/2

NGAP protocol

Cloud-native

Microservices

Troubleshooting

Roaming support

Cross-functional teamwork

Job description

Over 8+ years of expertise in engineering for 5G and 4G core nodes ( AMF, SMF , UPF, CUPS,MME, DNS , NRF) .

Manage AMF interfaces including N1, N2, N8, N11, N14, N15, N26, and others as per 3GPP specifications.

Ensure compliance with 3GPP standards and maintain performance enhancements for AMF.

In-depth knowledge of 5G core network architecture, especially AMF and SMF functions.

Experience with 3GPP TS 23.501 and related 3GPP specifications for 5G core network functions.

Interface with other network functions such as SMF, PCF, NRF, UDM, and AUSF via service-based interfaces.

Manage and optimize the Access and Mobility Management Function (AMF) within the 5G core network.

Proficiency in managing service-based interfaces (SBI) and protocols such as HTTP/2 and NGAP.

Demonstrated proficiency in on-premises infrastructure implementation and operations, particularly within telecom and 5G network environments.

Extensive experience architecting, troubleshooting , and managing microservices-based cloud-native applications in complex environments.

Handle connectivity and mobility management requests from User Equipment (UE) and gNB.

Support event subscription handling, including UE location reporting to SMF.

Implement PWS-IWF functionality for processing SBc interface messages and streamline network architecture.

Familiarity with session management, mobility management, and policy control in 5G networks.

Understanding of IP address management, DHCP, ARP proxying, and traffic steering.

Experience with cloud-native architectures and automation in network functions.

Ability to troubleshoot and optimize network function performance and reliability.

Knowledge of lawful intercept requirements and charging data synchronization.

Experience with roaming scenarios and interworking between home and visited SMFs.

Strong communication skills to collaborate with cross-functional teams and external partners.