OpenWRT Developer Bangalore • 4+ yrs • Engineering →

Nirad Networks; Bengaluru; On-site; INR 1,500,000 - 2,100,000; Full time

Job summary

Nirad Networks is seeking an experienced embedded Linux engineer to bring up OpenWRT on multiple hardware targets and customize firmware images. You will integrate 4G/5G modems, develop debugging tools, and extend LuCI for diagnostics in a high-ownership role from board bring-up to field diagnostics.

Proficiency in C and Python, with deep OpenWRT internals (uci, netifd, procd, ubus) and networking concepts, is essential. Familiarity with QMI/MBIM, uqmi, libqmi, and Buildroot tooling is required.

Qualifications

• Bring up OpenWRT on multiple hardware targets (MediaTek, Qualcomm, etc.).
• Create and maintain custom OpenWRT firmware images using ImageBuilder/Buildroot.
• Integrate and debug 4G/5G modems using QMI/MBIM and PPP.
• Develop debug utilities and monitoring tools in Python, shell or C.
• Customize the LuCI web interface for configuration and diagnostics.

Responsibilities

• Bring up OpenWRT on multiple hardware targets.
• Create and maintain custom OpenWRT firmware images.
• Integrate and debug 4G/5G modems using QMI/MBIM/PPP.
• Develop debug utilities and monitoring tools in Python, shell or C.
• Extend LuCI for configuration and diagnostics.

Skills

OpenWRT internals

C programming

Python scripting

Shell scripting

Networking concepts

Tools

uqmi

libqmi

ModemManager

tcpdump

strace

usbmon

LuCI

ImageBuilder

Buildroot

Job description

Own OpenWRT bring-up and customization across multiple hardware targets, and integrate 4G/5G connectivity. A highly technical, high-ownership role from board bring-up to field diagnostics.

OpenWRT Embedded Linux QMI / MBIM C Python LuCI Multi-WAN mwan3

What you'll do

• Bring up OpenWRT on multiple hardware targets (MediaTek, Qualcomm, etc.).
• Create and maintain custom OpenWRT firmware images using ImageBuilder / Buildroot.
• Integrate and debug 4G/5G modems (Quectel, Sierra) using QMI, MBIM and PPP.
• Develop debug utilities and monitoring tools in Python, shell or C.
• Customize and extend the LuCI web interface for configuration and diagnostics.
• Support multi-WAN, link failover and routing policies in real-world deployments.

Core technical skills

• Strong expertise in OpenWRT internals (UCI, netifd, procd, ubus, hotplug).
• Solid knowledge of QMI, MBIM and modem tools like uqmi, libqmi and ModemManager.
• Proficient in C and Python for embedded utilities and system tools.
• Skilled in shell scripting and automation within OpenWRT.
• Excellent troubleshooting with strace, tcpdump, usbmon and sysfs/procfs.
• Working knowledge of multi-WAN, mwan3, VLANs, firewall rules and routing.

Nice to have

• Deep understanding of TCP/IP, NAT, DHCP, DNS, VLAN, QoS and VPN.
• Experience with WireGuard, OpenVPN or SoftEther on embedded devices.
• Git and CI/CD for firmware; exposure to Yocto or Buildroot.
• Awareness of secure firmware practices and hardware watchdogs / SIM failover.