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Wireless Embedded C Developer (W2-Contract)

HPTech Inc.Englewood, CO🇺🇸United States

Why this role stands out

This hybrid role offers significant growth potential as you develop cutting-edge firmware for residential WiFi gateways, leveraging your embedded C and Linux/OpenWrt expertise to impact connectivity solutions. You'll thrive if you have a strong background in C programming, Linux networking, and cellular modem integration, making this an excellent opportunity to advance your skills with a reputable company.

Quick overview

SeniorityMid Senior
Work modeHybrid
LocationEnglewood, CO, United States
FiberShellGit5GCCI/CDLinux

Job description

Embedded C Developer

We are seeking an Embedded C Developer with strong Linux/OpenWrt experience to develop firmware for residential WiFi gateways supporting DOCSIS/Fiber WAN and LTE/5G cellular backup.

Key Responsibilities:

  • Implement LTE/5G failover, modem management, WAN routing, and health checks.
  • Work with cellular modems using AT commands, QMI/MBIM, USB, and PCIe/MHI.
  • Configure and troubleshoot WiFi drivers on Qualcomm/Broadcom/Atheros platforms.
  • Debug Linux kernel, PCIe, USB, networking, and driver-level issues.
  • Implement secure connectivity using TLS/mTLS, X.509, GRE, and IPsec.
  • Develop OpenWrt UCI configurations, init scripts, storage management, and unit tests.

Required Skills:

  • 5+ years of Embedded C development on Linux.
  • Strong C programming, IPC, memory management, and event-driven programming.
  • Strong Linux networking knowledge: IPv4/IPv6, routing, DHCP, netfilter, bridges.
  • Cellular modem integration using AT/QMI/MBIM.
  • Experience with GDB, strace, tcpdump, kernel logs, and serial console.
  • Git/GitLab, CI/CD, cross-compilation, and Shell scripting.

Preferred:

  • Qualcomm IPQ / Broadcom BCM / Atheros chipsets.
  • DOCSIS, WiFi 6/6E/7, PCIe/USB, eSIM/eUICC, TR-069/TR-369.
  • 5G NSA/SA, carrier aggregation, and ISP/MSO/OEM experience.

Tech Stack: C, Linux, Qualcomm/Broadcom, WiFi, LTE/5G, IPv4/IPv6, TLS, GRE/IPsec, GitLab, GDB.

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