Embedded C Developer

5+ years of embedded C development on Linux-based platforms Strong proficiency in C programming - pointers, memory management, IPC, event-driven architectures Experience with OpenWrt build system, package management, UCI configuration, and JFFS2/SquashFS overlay filesystems Familiarity with OpenSync 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, GitLab CI/CD, cross-compilation toolchains Understanding of WiFi standards (802.11ax/be) and wireless driver configuration Top Skills:

1. Embedded C Development on Linux/OpenWrt o C programming, Linux internals, debugging, IPC, event-driven design

2. OpenSync/OpenWrt Platform Development o OpenSync Managers, OVSDB, UCI, MQTT, OpenWrt build system

3. Linux Networking & LTE/5G Cellular Integration o Routing, IPv4/IPv6, failover, QMI/MBIM, modem management, GRE/IPsec

Terumo BCT

• Lakewood, CO
• $136,300-170,300 per year Requisition ID: 35462 At Terumo Blood and Cell Technologies, our 8,000+ global associates proud to come to work each day, knowing that what we do impacts the lives of patients ar…