EMBEDDED LINUX ENGINEER

Hello,

JD:-

• Workstream:
• Daemon to display realtime modem signal (RSSI/RSRP/RSRQ) and system health on the frontpanel screen.
• LED/LCD UI + Stabilization Logging:
• Crashpersistent logger forceflush critical logs to flash before reboot on system panic; display error codes on screen for field debugging.
• Remote Log Collection & Modem Diagnostics:
• Secure remote access tunnel (SSH reverse / WebSocket / TR069) for NOC engineers to pull system logs (syslog, dmesg, journald) and modem diagnostics.
• Log rotation/compression to prevent flash wear.
• REST/CLI interface for ondemand log retrieval.
• Modem Integration:
• Hardware Abstraction Layer (HAL) to communicate with 5G/LTE modems via AT commands over UART/USB.
• Support multivendor modems (Quectel, Sierra, Fibocom) through a unified interface.

1. Languages: Expert C/C++ (system daemons, sockets, multithreading, IPC)
2. Embedded Linux: systemd, syslog/journald, crosscompilation (Yocto/Buildroot), flash filesystems, gdb/strace debugging
3. RDK-B: Nonnegotiable handson with CCSP components, WebPA (TR069), and RDKB boot/logging flow
4. Cellular (3GPP): AT commands (AT+CSQ, AT+CREG, AT+CEREG, AT+QENG); understanding of LTE/5G NR registration and signal metrics
5. Networking: TCP/IP, NAT, VPNs, SSH/HTTPS, remote access protocols

• TR069 / CWMP or MQTT experience
• Yocto / BitBake recipes
• LVGL / Qt Embedded for UI
• FOTA (firmware overtheair) updates