Embedded C Developer OpenSync/OpenWrt

Hptech Inc.

United States

16 days ago

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Role details

Contract type

Permanent contract

Employment type

Full-time (> 32 hours)

Experience level

Expert

Experience required

5 years minimum

Working hours

Regular working hours

Job source

www.dice.com

Tech stack

C (Programming Language) Mobile Broadband Modems LTE (Telecommunication) Unit Testing Computer Networks Continuous Integration Dynamic Host Configuration Protocol Software Debugging Linux File Systems Memory Management Embedded C

+20 more

Event-Driven Programming Firmware Protocol Buffers Internet Protocol Security (IP SEC) IPv4 IPv6 Linux Kernel Message Queuing Telemetry Transport (MQTT) Routing PCI Express X.509 Broadcom Shell Script Tcpdump USB Wi-Fi Technology Data Storage Management Gitlab Git Openwrt

Job description

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., * Develop and debug embedded C software on Linux/OpenWrt platforms.

Develop OpenSync managers, OVSDB integrations, and cloud-managed services.
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.

Requirements

5+ years of Embedded C development on Linux.
Strong C programming, IPC, memory management, and event-driven programming.
Hands-on OpenWrt experience including UCI, build system, packages, and filesystems.
Experience with OpenSync, OVSDB, MQTT, protobuf or similar CPE frameworks.
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., * 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.