> Markdown version of [/jobs/ext/4299159-embedded-c-developer-opensync-openwrt-wifi-router-with-cellular](https://www.wearedevelopers.com/jobs/ext/4299159-embedded-c-developer-opensync-openwrt-wifi-router-with-cellular). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

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# Embedded C Developer - OpenSync/OpenWrt WiFi Router with Cellular

- **Company:** Siri InfoSolutions Inc
- **Location:** Denver, CO, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** C (Programming Language), Mobile Broadband Modems, LTE (Telecommunication), Computer Networks, Software Debugging, Linux, Memory Management, Embedded C, Failover, Internet Protocol Security (IP SEC), IPv4, IPv6, Virtual Private Networks (VPN), Network Security, Linux Kernel, Message Queuing Telemetry Transport (MQTT), Network Interface, Routing, Package Management Systems, X.509, Software Engineering, System Programming, Wi-Fi Technology, Network Routers, Git, Openwrt, Event Driven Architecture, Gitlab-ci
- **Published:** October 8, 2026
- **Apply:** https://www.dice.com/job-detail/69f8035e-55f8-424a-a63a-e37130800e01

## About the Role

* 5+ years of hands-on Embedded C development on Linux-based platforms.
 * Strong proficiency in C programming, including:
 + Pointers and memory management
 + IPC mechanisms
 + Event-driven architectures
 + Linux system programming
 * Hands-on experience with OpenWrt, including:
 + OpenWrt build system
 + Package management
 + UCI configuration
 + JFFS2/SquashFS overlay filesystems
 * Experience with OpenSync or similar cloud-managed CPE frameworks.
 * Knowledge of:
 + OVSDB

## Description

We are seeking an experienced Embedded C Developer with strong expertise in Linux, OpenWrt, OpenSync, WiFi routers, Linux networking, and cellular modem integration., + MQTT telemetry

 + OpenSync Managers
 * Strong experience with cellular modem integration, including:
 + AT commands
 + QMI/MBIM
 + rmnet/wwan interfaces
 + Network interface management
 + LTE/5G connectivity and failover
 * Strong understanding of Linux networking, including:
 + Routing tables and metrics
 + Netfilter
 + Bridge interfaces
 + IPv4/IPv6 dual-stack
 + Neighbor Discovery
 + DHCPv4/DHCPv6
 + SLAAC
 + IPv6 Prefix Delegation
 * Understanding of TLS and secure provisioning, including:
 + TLS handshake
 + Mutual authentication
 + X.509 certificates
 + Certificate chain validation
 * Knowledge of networking security and tunneling technologies:
 + GRE
 + IPsec
 + VPN overlays
 + Secure encapsulation for cloud-managed traffic
 * Experience with event-loop frameworks such as libev, libuv, or similar.
 * Proficiency with embedded/Linux debugging tools:
 + GDB
 + strace
 + tcpdump
 + Kernel logs
 + Serial console
 * Experience with Git, GitLab CI/CD, and cross-compilation toolchains.
 * Understanding of WiFi standards, including 802.11ax/802.11be and wireless driver configuration.

Top Skills

 1. Embedded C Development on Linux/OpenWrt
 + C programming
 + Linux internals
 + Debugging
 + IPC
 + Event-driven software design

 2. OpenSync/OpenWrt Platform Development
 + OpenSync Managers
 + OVSDB
 + UCI
 + MQTT
 + OpenWrt build system

 3. Linux Networking & LTE/5G Cellular Integration
 + Routing
 + IPv4/IPv6
 + Network failover
 + QMI/MBIM
 + Cellular modem management
 + GRE/IPsec