Job Description
Overview:
TekWissen is a global workforce management provider headquartered in Ann Arbor, Michigan that offers strategic talent solutions tour 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: Embedded C Developer
Location: Englewood, CO
Duration: 6 Months
Job Type: Temporary Assignment
Work Type: Onsite
Job Description
a { text-decoration: none; color: #464feb; } tr th, tr td { border: 1px solid #e6e6e6; } tr th { background-color: #f5f5f5; }
Summary
We are seeking an Embedded C Developer to work on next-generation residential gateway platforms that combine DOCSIS/Fiber WAN connectivity with LTE/5G cellular backup. The role involves developing and maintaining firmware on OpenWrt-based hardware running the OpenSync framework, supporting millions of deployed customer premises equipment (CPE) devices.
Responsibilities
- Design, develop, and debug embedded C software for Linux-based residential gateway platforms using ARM and MIPS SoCs.
- Develop and maintain OpenSync managers 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 health checks.
- Develop LED state machine logic for multi-WAN connectivity scenarios.
- Interface with cellular modems using AT commands, QMI/MBIM, USB, and PCIe (MHI) protocols.
- Configure and support WiFi drivers across 2.4GHz, 5GHz, and 6GHz radio platforms.
- Debug kernel-level issues including PCIe enumeration, USB device management, network driver failures, and kernel panics.
- Implement and maintain secure communication channels using TLS, mutual authentication, and tunneling protocols.
- Analyze and resolve field issues using logs, crash dumps, and remote diagnostics.
- Develop OpenWrt init scripts, UCI configuration handlers, and persistent storage management.
- Write unit tests and participate in code reviews using GitLab merge requests.
- Collaborate with hardware, QA, cloud engineering, and service provider teams.
Required Skills
- 5+ years of embedded C development on Linux-based platforms.
- Strong proficiency in C programming, memory management, IPC, and event-driven architectures.
- Experience with OpenWrt build systems, package management, UCI configuration, and JFFS2/SquashFS overlay file systems.
- Familiarity with OpenSync, OVSDB, Protobuf, and MQTT telemetry.
- Experience integrating cellular modems using AT commands, QMI, and WWAN interfaces.
- Strong understanding of Linux networking, routing tables, IPv4/IPv6 dual-stack networking, DHCPv4, DHCPv6, SLAAC, and prefix delegation.
- Understanding of TLS mutual authentication using X.509 certificates.
- Knowledge of GRE tunneling, IPsec, VPN overlays, and secure encapsulation technologies.
- Experience with event loop frameworks such as libev or libuv.
- Proficiency with debugging tools including GDB, strace, tcpdump, kernel logs, and serial consoles.
- Familiarity with Git, GitLab CI/CD, and cross-compilation toolchains.
- Understanding of WiFi standards including 802.11ax and 802.11be.
Preferred Skills
- Experience with Qualcomm IPQ series SoCs including IPQ5018 and IPQ9574.
- Experience with Broadcom BCM series chipsets including BCM4908, BCM6750, and BCM63178.
- Knowledge of Atheros, Qualcomm, and Broadcom wireless driver architectures.
- Experience with DOCSIS cable modem environments.
- Experience with PCIe and USB subsystems in embedded Linux.
- Familiarity with eSIM and eUICC provisioning technologies.
- Experience with NR5G NSA/SA and carrier aggregation.
- Understanding of TR-069 and TR-369 (USP) device management protocols.
- Familiarity with TR-181 data models.
- Experience with Kconfig-based build environments.
- Knowledge of flash storage management, wear leveling, and factory reset processes.
- Familiarity with thermal and power management for embedded platforms.
Tools & Technologies
- C.
- Shell Scripting (sh/bash).
- Python.
- OpenWrt.
- Linux Kernel 5.x/6.x.
- ARM Cortex-A53/A73.
- OpenSync.
- OVSDB.
- libev.
- protobuf-c.
- jansson.
- Qualcomm IPQ.
- Broadcom BCM.
- Atheros/QCA.
- iproute2.
- iptables.
- nftables.
- hostapd.
- wpa_supplicant.
- GRE.
- IPsec.
- OpenSSL.
- mbedTLS.
- X.509 Certificates.
- TLS 1.2 / TLS 1.3.
- MQTT.
- QMI.
- MHI.
- Make.
- Kconfig.
- GDB.
- Valgrind.
- Git.
- GitLab.
What You'll Work On
- Cellular failover and fallback state machines.
- LED indication logic for multi-WAN connectivity.
- Modem health monitoring and recovery frameworks.
- Internet reachability health-check platforms.
- Cloud-managed device configuration and telemetry reporting.
- Secure cloud connectivity using mTLS and X.509 certificates.
- GRE tunnel management.
- Firmware upgrades and factory reset workflows.
- IPv4/IPv6 network configuration and WAN failover.
- WiFi radio optimization across Qualcomm and Broadcom chipsets.
- Kernel crash analysis and driver-level issue resolution.
Years of Experience
- 14 Years of Experience.
TekWissen Group is an equal opportunity employer supporting workforce diversity.
Numbers & Facts
| Location | Englewood, CO |
| Industry | Computer/IT Services |
| Salary | $42.85 |
| Company Size | 100 to 499 employees |
| Year Founded | 2009 |
| Website | http://www.tekwissen.com/ |
About Company
WE THE TEKWISSEN PEOPLE
TekWissen offers you a broader portfolio of services, industry-leading solutions, and the meaningful innovations that give you greater flexibility and speed to respond to market dynamics, reduced costs and risk to improve enterprise performance, and increased productivity to enable growth.
To keep pace with global market demands, TekWissen keeps its finger on the pulse of change. Our organized approach to guiding a project from its inception to closure. Managing projects is becoming more and more important as we enter the digital era. To cope with the pace that this transition demands, a method is required to manage projects so they can yield quality work, while incorporating efficient use of time and resources.
Project involves identifying which quality standards are relevant to the project and determining how to satisfy them.
It is important to perform quality planning during the Planning Process and should be done alongside the other project planning processes because changes in the quality will likely require changes in the other planning processes, or the desired product quality may require a detailed risk analysis of an identified problem. It is important to remember that quality should be planned, designed, then built in, not added on after the fact.
Capabilities and accomplishments in one TekWissen business enhance the opportunity for success in the others. Put simply, TekWissen's unique combination of attributes promotes success.Skills
Level up your application
Professional resume templates
Browse dozens of recruiter approved resume templates, layouts and formats. Choose your favorite and make it your own in minutes.
Free resume templatesFree resume builder
Improve your existing resume or start from scratch and create a standout, ATS-friendly resume. Add job-specific content, download and apply.
Free resume builder