Hiring: Embedded C Developer – OpenSync/ WiFi Gateway-OnSite Company: Cognizant Location: Englewood, CO Job Posted Time: 2026-09-16 10:37:18 Employment Type: Remote Target Skills & Keywords : Agile, Bash, C, DNS, Embedded Systems, Event-Driven, Firmware, Git, GitLab, GitLab CI, Linux, Protobuf, Python, SOC, Scrum, Shell, TLS, VPN About the job Experience: •5+ years of embedded C development on Linux-based platforms Required Skills: •Design, develop, and debug embedded C software for Linux-based residential gateway platforms (ARM/MIPS SoC) •Develop and maintain OpenSync managers — event-driven daemons that interact with OVSDB for cloud-managed configuration and state reporting •Implement and optimize LTE/5G cellular failover and fallback logic including modem management, route arbitration, and WAN healthchecks •Develop LED state machine logic to provide accurate device status indication across complex multi-WAN scenarios •Interface with cellular modems via AT commands, QMI/MBIM, USB, and PCIe (MHI) protocols •Interface directly with WiFi drivers (Qualcomm/Broadcom/Atheros) for 2.4GHz, 5GHz, and 6GHz radio configuration •Debug kernel-level issues including PCIe enumeration, USB device management, network driver crashes, and kernel panics •Implement and maintain secure communication channels using TLS with mutual authentication and tunneling protocols Qualifications: •Exposure to hardware bring-up and board support package (BSP) development •Understanding of TR-181 data model parameters for WAN management, WiFi configuration, and device monitoring •Cellular failover/fallback state machines with sub-second transition handling •LED indication logic for multi-WAN connectivity states •Modem health monitoring and subsystem restart/recovery •Cloud-managed device configuration and telemetry reporting via MQTT •Secure cloud connectivity using mTLS with X.509 certificate-based mutual authentication •GRE tunnel management for cloud-redirected traffic •Factory reset, firmware upgrade, and persistent storage management Compensation: •$104,000 - $118,000 / year Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!