Embedded C Developer – OpenSync/OpenWrt

Embedded C Developer – OpenSync/OpenWrtWe 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: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.Required Skills: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.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, OpenWrt, OpenSync, OVSDB, MQTT, Qualcomm/Broadcom, WiFi, LTE/5G, IPv4/IPv6, TLS, GRE/IPsec, GitLab, GDB.