Global Medical Communications Lead – Publications & Data

JD:
We're looking for an Embedded C Developer to work on next-generation residential gateway platforms that combine DOCSIS/fiber WAN connectivity with LTE/5G cellular backup. You'll be developing and maintaining firmware on Open Wrt-based hardware running the Open Sync framework, with direct impact on millions of deployed customer premises equipment (CPE).

Responsibilities

• Design, develop, and debug embedded C software for Linux-based residential gateway platforms (ARM/MIPS SoC)

• Develop and maintain Open Sync 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 health checks

• 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

• Work 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

• Analyze and resolve field issues using device logs, crash dumps, and remote diagnostics

• Develop init scripts, UCI configuration handlers, and persistent storage management for Open Wrt

• Write unit tests and participate in code reviews via Git Lab merge requests

• Collaborate with hardware teams, QA, cloud platform engineers, and service provider partners

Required Skills

• 5+ years of embedded C development on Linux-based platforms

• Strong proficiency in C programming — pointers, memory management, IPC, event-driven architectures

• Experience with Open Wrt build system, package management, UCI configuration, and JFFS2/SquashFS overlay file systems

• Familiarity with Open Sync or similar cloud-managed CPE frameworks (OVSDB, protobuf, MQTT telemetry)

• Experience with cellular modem integration — AT commands, QMI, network interface management (rmnet/wwan)

• Strong understanding of Linux networking — routing tables, metrics, netfilter, bridge interfaces, IPv4 and IPv6 dual-stack, neighbor discovery, DHCPv4/DHCPv6, SLAAC, and prefix delegation

• Understanding of TLS handshake with mutual authentication using X.509 certificates, certificate chain validation, and secure provisioning

• Knowledge of security and tunneling protocols — GRE tunneling, IPsec, VPN overlays, and secure encapsulation for cloud-managed traffic

• Experience with event loop frameworks (libev, libuv, or similar)

• Proficiency with debugging tools — GDB, strace, tcpdump, kernel logs, serial console

• Familiarity with Git, Git Lab CI/CD, cross-compilation tool chains

• Understanding of WiFi standards (802.11ax/be) and wireless driver configuration

Preferred Skills

• Experience with Qualcomm IPQ series SoCs (IPQ
5018, IPQ
9574) and NSS/PPE data path

• Experience with Broadcom BCM series chipsets (BCM
4908, BCM
6750, BCM
63178) and Memory Direct Engine (MDE) / hardware acceleration

• Knowledge of Atheros/QCA/BCM wireless chipsets and CFG
80211/mac
80211 driver architecture

• Knowledge of DOCSIS cable modem interaction and WAN interface management

• Experience with PCIe and USB subsystems in embedded Linux (device enumeration, power management, error recovery)

• Familiarity with eSIM/eUICC provisioning (LPA, GSMA SGP.
22)

• Experience with carrier aggregation, NR5G NSA/SA, and multi-band cellular configurations

• Understanding of TR-069/TR-369 (USP) device management protocols

• Basic understanding of TR-181 data model for CPE device management and service configuration

• Experience…