Sr. Embedded Developer

Sr. Embedded Developer Englewood, CO - onsite 10 Months 1. Embedded C Programming, Linux, Operating System (10+ years) 2. WiFi standards and Networking Domain Expertise (10+ years), basic understanding of 5G/LTE technology (high level) 3. Strong debugging and problem solving skills (10+ years) Prior experience working with networking devices such as wifi routers, cable modems, CMTS etc. will be beneficial. Hands on experience working with Opensync, OpenWRT, RDK-B etc. will be an advantage. WiFi Integration * Develop and maintain WiFi radio configuration across Qualcomm, Broadcom, and Atheros chipsets for 2.4GHz, 5GHz, and 6GHz bands * Implement and debug WiFi features including band steering, client steering, channel selection (DFS/non-DFS), BSS Coloring, OFDMA, MU-MIMO, TWT, and MLO (WiFi 7) * Work with hostapd/wpa_supplicant configuration, CFG80211/mac80211/nl80211 driver interfaces * Develop and maintain OpenSync WiFi managers for cloud-managed radio configuration, client monitoring, and statistics reporting * Debug WiFi driver crashes, firmware asserts, performance regressions, and interoperability issues across client devices * Implement mesh/extender backhaul configuration and optimization * Develop and tune RvR (Rate vs Range) and throughput KPIs across firmware builds * Support channel switching, ECSA, radar detection (DFS), and regulatory compliance across multiple country codes Cellular Backup (Phone-as-Backhaul) * Implement phone-as-backhaul connectivity - enabling the router to use the customer's mobile device as a backup WAN path * Develop the router-side failover client that communicates with the companion mobile app (MSA) to initiate and terminate backup sessions * Implement WAN outage detection and internet reachability healthcheck framework * Develop route arbitration and traffic steering logic between primary WAN and phone-based cellular backup * Manage concurrent WiFi AP + STA operation - serving home clients on AP while connected to phone hotspot as upstream STA * Handle USB tethering detection and network interface management (RNDIS/CDC-NCM/CDC-ECM) * Implement graceful failback logic when primary WAN recovers * Develop LED state machine logic for multi-WAN connectivity status indication * Implement QoS and bandwidth management during cellular backup mode (customer's data plan awareness) Platform & Common * 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 secure communication channels using TLS with mutual authentication (mTLS) between router and cloud/mobile app * Debug kernel-level issues including network driver crashes, kernel panics, and memory leaks * Develop init scripts, UCI configuration handlers, and persistent storage management for OpenWrt * Analyze and resolve field issues using device logs, crash dumps, logpull analysis, and remote diagnostics * Write unit tests and participate in code reviews via GitLab merge requests * Collaborate with hardware teams, QA, cloud platform engineers, mobile app teams, and service provider partners

 

At SPECTRAFORCE, we are committed to maintaining a workplace that ensures fair compensation and wage transparency in adherence with all applicable state and local laws. The pay rate for this position is $50.00/hr.