4G5G Core Network Engineer

This is a remote position.

Job Title: 4G/5G Core Network Engineer

Work Type: Remote (EST/CST)

Employment Type: Contract (C2C)

Duration: 12 Months with Possible Extension

Visa Requirement: No H1B & OPT

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