4G/5G Stack-L2 Lead / Engineer

Orchestra Telecom Services; Bengaluru; On-site; INR 2,500,000 - 4,000,000; Full time

Job summary

Orchestra Telecom Services in Bengaluru, India is seeking a 4G/5G Stack L2 Lead / Engineer with 3–12 years of experience to develop and debug L2 software, focusing on MAC, RLC and PDCP for LTE and 5G NR. The role emphasizes MAC scheduling optimization and L2 performance analysis to improve latency, throughput and reliability.

Applicants should hold a Bachelor's degree or higher in Computer Science, Telecommunications or related fields; proficiency in C/C++ and Python is required; hands-on 4G/5G

Qualifications

• Bachelor's degree or above in CS/Telecommunications or related fields.
• Hands-on experience in 4G/5G L2 software development.
• Strong C/C++ and Python programming skills.

Responsibilities

• Develop and debug 4G/5G L2 software using C/C++ and Python.
• Work on MAC, RLC, and PDCP layers for LTE and 5G NR.
• Design, develop, optimize, and debug MAC scheduling algorithms for LTE eNB and 5G gNB.
• Work on segmentation/reassembly, retransmission, flow control, QoS, ciphering/integrity, and packet handling.
• Understand HARQ, TDD/FDD timing, uplink scheduling, DRX, BSR, and LCP.
• Optimize L2 performance for latency, throughput, retransmissions, fairness, QoS, and power saving.
• Analyze system logs, L2 traces, PCAPs, timing logs, and RF test results to identify and resolve issues.
• Work with L1/L2/L3 interfaces and understand 3GPP RAN architecture.
• Support interoperability testing across different UEs, chipsets, core networks, and network vendors.
• Work with protocol decoding and ASN.1 workflows.

Skills

C/C++ programming

Python

4G/5G L2 software development

MAC scheduling

LTE/5G NR knowledge

Education

Bachelor's degree or above in CS/Telecommunications/Information Engineering

Tools

Linux debugging

ASN.1 protocol decoding

Protocol decoding tools

x86/ARM server environments

Job description

Job Title: 4G/5G Stack L2 Lead / Engineer
Experience: 3–12 Years

Job Location: Bengaluru, India

Vacancies: 10

Education: Bachelor's degree or above in Computer Science, Telecommunications, Information Engineering, Automation, or related fields.

Key Responsibilities

• Develop and debug 4G/5G L2 software using C/C++ and Python.
• Work on MAC, RLC, and PDCP layers for LTE and 5G NR.
• Design, develop, optimize, and debug MAC scheduling algorithms for LTE eNB and 5G gNB.
• Work on segmentation/reassembly, retransmission, flow control, QoS, ciphering/integrity, and packet handling.
• Understand HARQ, TDD/FDD timing, uplink scheduling, DRX, Buffer Status Reports (BSR), and Logical Channel Prioritization (LCP).
• Optimize L2 performance for latency, throughput, retransmissions, fairness, QoS, and power saving.
• Analyze system logs, L2 traces, PCAPs, timing logs, and RF test results to identify and resolve issues.
• Work with L1/L2/L3 interfaces and understand 3GPP RAN architecture.
• Support interoperability testing across different UEs, chipsets, core networks, and network vendors.
• Work with protocol decoding and ASN.1 workflows.

Tools & Technologies

• C/C++, Python
• LTE / 5G NR
• MAC / RLC / PDCP
• ASN.1 and protocol decoding
• Linux debugging and performance tuning
• QCAT, Viavi, IxLoad Wireless, IxNetwork
• Spirent Landslide
• Wireshark
• PCAP and log analysis
• DPDK, Hugepages, SR-IOV
• FPGA/SoC, SmartNIC/DPU
• x86/ARM-based server environments
• Virtualized DU/CU deployments

Preferred Experience

• Strong hands-on experience in 4G/5G L2 software development.
• Experience with MAC scheduler development and optimization is highly preferred.
• For senior-level profiles, experience driving 4G/5G L2 development programs and delivery is preferred.

Pavan Sharma

Senior Talent Acquisition Specialist

Contact: [phone]

Email: [e-mail]