{"schemaVersion":"jobsearcher.job.v1","id":"76ccb89f5377cf7684e4c1b5","url":"https://jobsearcher.com/jobs/76ccb89f5377cf7684e4c1b5","canonicalUrl":"https://jobsearcher.com/jobs/76ccb89f5377cf7684e4c1b5","title":"Embedded C Developer – OpenSync/OpenWrt WiFi Router with Cellular","description":"Job Title: Embedded C Developer – OpenSync/OpenWrt WiFi Router with CellularWork Location : Denver, CO (4 days onsite/week)Contract duration: 12+ months ContractJob Description:Required Skills• 5+ years of embedded C development on Linux-based platforms• Strong proficiency in C programming — pointers, memory management, IPC, event-driven architectures• Experience with OpenWrt build system, package management, UCI configuration, and JFFS2/SquashFS overlay filesystems• Familiarity with OpenSync or similar cloud-managed CPE frameworks (OVSDB, protobuf, MQTT telemetry)• Experience with cellular modem integration — AT commands, QMI, network interface management (rmnet/wwan)• Strong understanding of Linux networking — routing tables, metrics, netfilter, bridge interfaces, IPv4 and IPv6 dual-stack, neighbor discovery, DHCPv4/DHCPv6, SLAAC, and prefix delegation• Understanding of TLS handshake with mutual authentication using X.509 certificates, certificate chain validation, and secure provisioning• Knowledge of security and tunneling protocols — GRE tunneling, IPsec, VPN overlays, and secure encapsulation for cloud-managed traffic• Experience with event loop frameworks (libev, libuv, or similar)• Proficiency with debugging tools — GDB, strace, tcpdump, kernel logs, serial console• Familiarity with Git, GitLab CI/CD, cross-compilation toolchains• Understanding of WiFi standards (802.11ax/be) and wireless driver configurationTop Skills:1. Embedded C Development on Linux/OpenWrto C programming, Linux internals, debugging, IPC, event-driven design2. OpenSync/OpenWrt Platform Developmento OpenSync Managers, OVSDB, UCI, MQTT, OpenWrt build system3. Linux Networking & LTE/5G Cellular Integrationo Routing, IPv4/IPv6, failover, QMI/MBIM, modem management, GRE/IPsec","company":"Clifyx","rawCompany":"clifyx","city":"Denver","state":"CO","isRemote":false,"isActive":false,"createdAt":"2026-10-31T07:59:02.946Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1244.00","title":"Network and Computer Systems Administrators","slug":"network-and-computer-systems-administrators"}],"industries":[{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"517112","title":"Wireless Telecommunications Carriers (except Satellite)","slug":"wireless-telecommunications-carriers-except-satellite"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Embedded C Developer – OpenSync/OpenWrt WiFi Router with Cellular","description":"Job Title: Embedded C Developer – OpenSync/OpenWrt WiFi Router with CellularWork Location : Denver, CO (4 days onsite/week)Contract duration: 12+ months ContractJob Description:Required Skills• 5+ years of embedded C development on Linux-based platforms• Strong proficiency in C programming — pointers, memory management, IPC, event-driven architectures• Experience with OpenWrt build system, package management, UCI configuration, and JFFS2/SquashFS overlay filesystems• Familiarity with OpenSync or similar cloud-managed CPE frameworks (OVSDB, protobuf, MQTT telemetry)• Experience with cellular modem integration — AT commands, QMI, network interface management (rmnet/wwan)• Strong understanding of Linux networking — routing tables, metrics, netfilter, bridge interfaces, IPv4 and IPv6 dual-stack, neighbor discovery, DHCPv4/DHCPv6, SLAAC, and prefix delegation• Understanding of TLS handshake with mutual authentication using X.509 certificates, certificate chain validation, and secure provisioning• Knowledge of security and tunneling protocols — GRE tunneling, IPsec, VPN overlays, and secure encapsulation for cloud-managed traffic• Experience with event loop frameworks (libev, libuv, or similar)• Proficiency with debugging tools — GDB, strace, tcpdump, kernel logs, serial console• Familiarity with Git, GitLab CI/CD, cross-compilation toolchains• Understanding of WiFi standards (802.11ax/be) and wireless driver configurationTop Skills:1. Embedded C Development on Linux/OpenWrto C programming, Linux internals, debugging, IPC, event-driven design2. OpenSync/OpenWrt Platform Developmento OpenSync Managers, OVSDB, UCI, MQTT, OpenWrt build system3. Linux Networking & LTE/5G Cellular Integrationo Routing, IPv4/IPv6, failover, QMI/MBIM, modem management, GRE/IPsec","datePosted":"2026-10-31T07:59:02.946Z","dateModified":"2026-10-31T07:59:02.946Z","hiringOrganization":{"@type":"Organization","name":"Clifyx","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Denver","addressRegion":"CO","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"76ccb89f5377cf7684e4c1b5"},"url":"https://jobsearcher.com/jobs/76ccb89f5377cf7684e4c1b5"}}