L3 Engineer

11 hours ago

Bengaluru, Karnataka, India Maimsd Technology Full time ₹ 15,00,000 - ₹ 25,00,000 per year

Description :
Job Description : Layer 3 (L3) Engineer (LTE/5G Protocol Stack)

Location :
Bengaluru, India

Experience Range :
2 - 9 years

We're hiring an experienced and results-oriented Layer 3 (L3) Engineer to join our team in Bengaluru. This critical role involves the design, development, and optimization of the control and user plane protocols for our cutting-edge base station (eNodeB/gNB) solutions in LTE (4G) and 5G networks, with a strong focus on Cloud-Native deployment and high-performance packet processing.

Responsibilities

  • Protocol Development : Design, implement, and maintain core 4G and 5G protocols including RRC (Radio Resource Control) and control plane aspects of PDCP within the eNodeB/gNB software.
  • Signaling Interface Implementation : Develop and integrate inter-eNB/gNB and core network signaling interfaces such as S1AP and X2AP (or their 5G equivalents).
  • User Plane Development : Implement and optimize user plane protocols like GTP-U (GPRS Tunneling Protocol User Plane) for efficient data handling.
  • Self-Organizing Networks (SON) : Implement and validate SON (Self-Organizing Network) features (e.g., ANR, MLB) to enhance network automation and efficiency.
  • High-Performance Networking : Utilize and integrate fast packet processing frameworks like DPDK (Data Plane Development Kit) or VPP (Vector Packet Processing) to achieve ultra-low latency and high throughput for the user plane.
  • Cloud-Native Integration : Deploy and manage L3 applications using containerization technologies such as Docker and orchestration platforms like Kubernetes in a Linux environment.
  • Debugging & Testing : Troubleshoot complex system and protocol issues, perform log analysis, and ensure the stability and conformance of the protocol stack with 3GPP standards.

Required Skills And Expertise
Mandatory Technical Skills :

  • Wireless Standards : Mandatory expertise in LTE (4G) and 5G systems, with a deep understanding of the Control Plane and User Plane protocols.
  • eNodeB/gNB Focus : Demonstrable and relevant experience must be specifically on the Base Station (eNodeB/gNB) side of the protocol stack.

Key 4G/5G Protocols :
In-depth, hands-on development experience with :

  • RRC (Radio Resource Control)
  • PDCP control plane
  • S1AP and X2AP
  • GTP-U (User Plane)
  • Programming Languages : Expert proficiency in C/C++ for developing high-performance, real-time networking and control plane software.
  • Operating Systems : Solid experience with development and debugging on Linux operating systems.

Core Competencies

  • Cloud-Native : Practical experience with Kubernetes and Docker for deploying, scaling, and managing microservices-based telecom functions.
  • High-Speed Processing : Hands-on experience or strong conceptual knowledge of accelerated data plane technologies like DPDK or VPP.
  • SON : Working knowledge of SON principles and implementation.
  • 3GPP Standards : Strong command of relevant 3GPP LTE and 5G standards for Layer 3 protocols.

Qualifications

  • Bachelor's or Master's degree in Electrical Engineering, Computer Science, or a related field.
  • 2 to 9 years of relevant professional experience in L3 software development for wireless base stations (eNodeB/gNB/gNB-DU/CU).

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