JD – Senior Developer, OAM (5G/4G/2G)

Role overview

• Position: Senior Developer, OAM for 2G, 4G and 5G RAN and 2G BSC
• Reports to: Senior O&M and Platform Lead
• Location: Bangalore or Gurgaon
• Experience: 8+ years in 4G/5G OAM software development
• The role: design, code, test and debug OAM modules for RAT, its adapters, M-plane or northbound areas, and mentor junior developers

Key responsibilities

• Design, code, debug and deploy OAM modules in C/C++ (C++11 or later) and Python on Linux
• Build and enhance the core managers: configuration, fault, performance, process health, software and log, and inventory
• Write RAT adapters that map 2G, 4G and 5G objects, counters and alarms
• Implement the RU M-plane manager: a NETCONF client with YANG models for RU discovery, supervision, configuration, fault, performance and software
• Implement northbound interfaces: SNMP agent and MIB, XML or NETCONF server, syslog client, and O1 towards an SMO
• Implement FM, PM, CM and trace as defined in 3GPP TS 28.x and 32.x and the O-RAN O1 specs
• Integrate the fronthaul and sync manager (GNSS, PTP, SyncE, holdover and cell gating signals) and the hardware manager (BMC, power, optics)
• Knowledge of HAL and DPDK APIs
• Hands on with OAM over Qualcomm, Cavium and Intel platforms

• Write unit, integration and regression tests using pytest and Robot Framework, with simulated RU, OMC and RAT stacks
• Maintain build and CI/CD pipelines, makefiles and container images
• Debug and fix defects from integration, system test and customer sites
• Review code and mentor junior developers
• Estimate and deliver work items to the release plan, and flag risks early
• Work with architects, platform engineers and test engineers on interfaces and design changes

Required skills and experience

• 8+ years in 4G/5G OAM product development
• Has developed and tested OAM modules for RAN, Core or both, end to end
• Has worked on production OAM code through sustenance and customer support
• Hands-on with 2G BTS O&M (Abis OML) or multi-RAT OAM
• NETCONF and YANG tooling (libyang, sysrepo, netopeer2)
• DPDK, PREEMPT-RT Linux, KVM, and board or BMC integration
• Massive MIMO RU management (arrays, beamforming, calibration)
• PTP, SyncE and GNSS sync management
• Test automation with pytest, Robot Framework and simulators
• Exposure to Intel or Qualcomm based baseband platforms

• C/C++ (C++11 or later), Python, and solid object-oriented design
• Multi-threading and multi-processing architectures on Linux
• Build environments (makefiles) and CI/CD systems
• Docker, Kubernetes and container platforms
• Debugging with gdb, core dumps, logs and packet captures

• ASN.1, XML, JSON, YAML
• HTTP(S), SNMP, Kafka
• NETCONF and YANG

• 4G/5G network architecture and network management principles
• FM, PM and CM modules and their data models
• O-RAN O1 (FM, PM, CM) and the O-RAN O1 NRM
• 3GPP CM: TS 32.602, 32.612, 28.531, 28.532
• 3GPP data models: TS 32.622, 32.762, 28.622, 28.541
• 3GPP FM: TS 32.111-2, 28.111
• 3GPP PM, counters and KPIs: TS 32.412, 32.425, 32.450, 28.550, 28.552, 28.554
• Trace and MDT: TS 32.422, 32.423
• B.E./B.Tech or M.E./M.Tech in Electronics, Telecommunications, Computer Science or a related field

• Location: Bangalore / Gurgaon