1. Embedded C Programming, Linux, Operating System (5+ years)
2. WiFi standards and Networking Domain Expertise (5+ years), basic understanding of 5G/LTE technology (high level)
3. Strong debugging and problem solving skills (5+ 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
Jr. Embedded Developer • Englewood, CO, United States
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