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4G/5G Core Network Engineer

San R&D Business Solutions LLC, New York, NY, United States


San R&D Business Solutions LLC | Full time

Duration:

12+ Months with Possible Extension

About the Role
We are seeking a highly skilled

4G/5G Core Network Expert

with strong experience in

telecom APIs and network function integration . The ideal candidate will work closely with telecom vendors (Nokia, Ericsson, Samsung) and internal teams to enable

API-driven integration across 5G core network functions , aligned with industry standards such as

3GPP, GSMA Open Gateway, and LF CAMARA . This role requires deep expertise in

core network architecture, REST APIs, and telecom standards , along with the ability to analyze specifications and translate them into practical integration solutions.

Key Responsibilities

Work with

4G/5G core network products

from vendors like

Nokia, Ericsson, and Samsung

Analyze and interpret

3GPP specifications

and telecom standards

Design and implement

API integrations

across network functions (NFs)

Work with

REST APIs (OpenAPI/Swagger)

for telecom integrations

Enable integration of

LF CAMARA APIs with network functions

such as:

NEF / SCEF

PCF (Policy Control Function)

UDR (Unified Data Repository)

Collaborate with vendors to

identify gaps and define API roadmaps

Support implementation of

GSMA Open Gateway architectures

Understand and contribute to

call flows and connection flows

across:

IMS (IP Multimedia Subsystem)

SBA (Service-Based Architecture)

OSS/BSS systems (TM Forum standards)

Provide technical guidance on

API exposure and network capabilities

Required Skills

Strong experience in

4G/5G Core Network architecture

Hands-on experience with telecom vendors:

Nokia / Ericsson / Samsung

Strong understanding of:

3GPP standards (5G core, NEF, SCEF, etc.) ,

LF CAMARA APIs ,

GSMA Open Gateway architecture

Experience with

REST APIs (OpenAPI / Swagger)

Knowledge of

network function interfaces and integrations

Understanding of

IMS, SBA, OSS/BSS call flows

Preferred Skills

Experience working with

API exposure layers in telecom

Familiarity with

TM Forum frameworks

Experience working with

vendor roadmap alignment and integration gaps

Strong analytical skills to interpret

technical specifications

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