Radisys 4G LTE - NB IoT Layer-2 Developer

Acldigital; Bengaluru; On-site; INR 1,200,000 - 2,500,000; Full time

Job summary

Acldigital in Bengaluru is seeking an experienced LTE/NB-IoT Layer 2 engineer with 8.5-10 years of hands-on development in MAC/RLC/PDCP. You will design, implement, and optimize Layer 2 features for LTE/NB-IoT and contribute to cross-functional projects.

Role involves refining MAC scheduling, QoS, and performance, while collaborating with Layer 1 and Layer 3 teams. Strong 3GPP knowledge and C/C++ skills are essential for this position.

Qualifications

• Hands-on LTE Layer 2 (MAC/RLC/PDCP) development experience.
• Strong knowledge of LTE/NB-IoT and 5G NR stack.
• Good knowledge of 3GPP Rel-15/16/17/18.

Responsibilities

• Design, develop, and maintain Layer 2 protocols (MAC, RLC, PDCP) features.
• Work on scheduling algorithms, resource allocation, and QoS in MAC layer.
• Analyze and debug Layer 2 issues using logs and protocol analyzers.
• Collaborate with Layer 1 and Layer 3 teams for end-to-end feature integration.
• Participate in design reviews and performance optimization for 4G/NB-IoT.
• Support field testing, interoperability testing, and customer issue resolution.

Skills

LTE Layer 2

C/C++ programming

multi-threading

debugging

problem solving

3GPP standards Rel-15-18

Tools

Wireshark

QXDM

QCAT

TM500

UE simulators

Git

Jenkins

JIRA

Job description

4G LTE/NB-IoT Layer 2

8.5-10 Years | Bangalore

Notice Period

≤ 30 Days Preferred

Must Have

• Hands‑on experience in LTE Layer 2 (MAC/RLC/PDCP) development.
• Strong understanding of LTE/NB-IoT and 5G NR architecture and protocol stack.
• Good knowledge of 3GPP standards (Rel-15/16/17/18).

Good to Have

• Experience with tools like Wireshark, protocol analyzers, log analysis tools.
• Familiarity with hardware‑based test tools such as TM500 or UE simulators and protocol analyzers like QXDM, QCAT.
• Proficiency in GIT, Jenkins (CI/CD) and JIRA for agile development.

Ideal Candidate

• Strong understanding of LTE/NB-IoT and 5G NR architecture and protocol stack.
• Good knowledge of 3GPP standards (Rel-15/16/17/18).
• Hands‑on experience in LTE Layer 2 (MAC/RLC/PDCP) development.
• Proficiency in C/C++ programming.
• Knowledge of multi‑threading and concurrency.
• Strong debugging and problem‑solving skills.
• Experience with Wireshark, protocol analyzers, log analysis tools.
• Familiarity with hardware‑based test tools such as TM500 or UE simulators and protocol analyzers like QXDM, QCAT.
• Proficiency in GIT, Jenkins (CI/CD) and JIRA for agile development.

What the Role Involves

• Design, develop, and maintain Layer 2 protocols (MAC, RLC, PDCP) features such as eDRX, PSM, Coverage Enhancement for LTE/NB-IoT.
• Work on scheduling algorithms, resource allocation, and QoS handling in the MAC layer. Contribute to documentation, including design specifications and test plans.
• Analyze and debug Layer 2 issues using logs, traces, and protocol analyzers.
• Collaborate with Layer 1 and Layer 3 teams for end-to-end feature integration. Ensure compliance with 3GPP specifications for 4G.
• Participate in system design, code reviews, and performance optimization. Work on throughput, latency, and reliability improvements in 4G.
• Support field testing, interoperability testing, and customer issue resolution.