Job highlights

- Preferred experience
- Experience with Linux / Unix environments . Multithreading and shared-memory design . Timers,state machines,and protocol packet processing . Debugging packet traces and protocol logs . Understanding of LTE / NB-IoT bearer concepts: SRB / DRB,logical channels and transport channels . UE context,cell context,and RB reconfiguration

Job Summary Plans, designs, develops and tests software systems or applications for software enhancements and recent products including cloud-based or internet-related tools. May use common development methodologies such as Waterfall and Agile.

Key Responsibilities

- Design, implement, and debug Layer 2/3 control and data path features
- Maintain MAC scheduler behavior for UL/DL grant decisions and resource allocation
- Work on RLC and PDCP flows for segmentation, retransmission, reordering, and bearer management
- Implement and validate UE/CELL state transitions driven by RRC and S1AP/X2AP messages
- Troubleshoot protocol interoperability and real-world failure scenarios
- Optimize scheduler and bearer behavior for NB-IoT constraints such as coverage, latency, and power efficiency

Job Requirements Must-have skills

- 3GPP LTE/NB-IoT Layer 2/3 protocols: MAC scheduling, HARQ, RACH, paging, logical channels, and UE state handling
- RLC modes and retransmission behavior
- PDCP sequence numbering, security, ROHC, and bearer management




- RRC setup/reconfiguration/release and UE control procedures
- S1AP/X2AP signaling and UE/cell context management
- Hands-on experience in C/C++ development for telecom or embedded networking stacks
- Familiarity with low-latency, real-time scheduling and event-driven protocol processing
- Experience with Linux/Unix environments
- Multithreading and shared-memory design
- Timers, state machines, and protocol packet processing
- Debugging packet traces and protocol logs
- Understanding of LTE/NB-IoT bearer concepts: SRB/DRB, logical channels and transport channels
- UE context, cell context, and RB reconfiguration; connection establishment, mobility, and release procedures

Preferred experience

- NB-IoT or LTE eNodeB stack development
- Knowledge of 3GPP specs: MAC, RLC, PDCP, RRC, S1AP, X2AP
- ASN.1 / protocol encoders/decoders
- Security/encryption functions used in PDCP
- Scheduler optimization, throughput/latency tuning, and interference handling
- Ability to work with vendor stacks and trace tools such as Wireshark, logs, and internal UE/eNB diagnostics

Disclaimer: This job posting has been aggregated from external source. Role details, content, and availability are subject to change. Applicants are advised to confirm the latest information directly on the company website before applying.

📌 NBIOTEngineer (Bengaluru)
🏢 Mavenir
📍 Bengaluru