Jr. Embedded Developer

Overview:

TekWissen is a global workforce management provider headquartered in Ann Arbor, Michigan that offers strategic talent solutions to our clients world-wide. Our client is an American multinational information technology services and consulting company and is a leading provider of information technology, consulting, and business process outsourcing services, dedicated helping the world's leading companies build stronger businesses.

Job Title: Jr. Embedded Developer
Location: Englewood, CO
Duration: 6 Months
Job Type: Temporary Assignment
Work Type: Onsite

Job Description:

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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.

Years of Experience:

• 7 Years of Experience

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1. Embedded C Programming, Linux, Operating System (5+ years)

• 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)

• 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)

• Strong debugging and problem solving skills.
• 5+ years.

TekWissen Group is an equal opportunity employer supporting workforce diversity.