{"schemaVersion":"jobsearcher.job.v1","id":"5fdd3661188035f301d05282","url":"https://jobsearcher.com/jobs/5fdd3661188035f301d05282","canonicalUrl":"https://jobsearcher.com/jobs/5fdd3661188035f301d05282","title":"Embedded C Developer OpenSync/OpenWrt","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 configuration.Top Skills:Embedded C Development on Linux/Open WrtC programming, Linux internals, debugging, IPC, event-driven designOpen Sync/OpenWrt Platform DevelopmentOpen Sync Managers, OVSDB, UCI, MQTT, Open Wrt build systemLinux Networking & LTE/5G Cellular IntegrationRouting, IPv4/IPv6, failover, QMI/MBIM, modem management, GRE/IPsec","company":"Clifyx","rawCompany":"clifyx","city":"Denver","state":"CO","isRemote":false,"isActive":false,"createdAt":"2026-10-31T07:53:24.259Z","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":"541519","title":"Other Computer Related Services","slug":"other-computer-related-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Embedded C Developer OpenSync/OpenWrt","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 configuration.Top Skills:Embedded C Development on Linux/Open WrtC programming, Linux internals, debugging, IPC, event-driven designOpen Sync/OpenWrt Platform DevelopmentOpen Sync Managers, OVSDB, UCI, MQTT, Open Wrt build systemLinux Networking & LTE/5G Cellular IntegrationRouting, IPv4/IPv6, failover, QMI/MBIM, modem management, GRE/IPsec","datePosted":"2026-10-31T07:53:24.259Z","dateModified":"2026-10-31T07:53:24.259Z","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":"5fdd3661188035f301d05282"},"url":"https://jobsearcher.com/jobs/5fdd3661188035f301d05282"}}