Embedded Software Engineer

Indianapolis, Indiana, United States
Contract
On-site
$70–$75 per hour
Posted Nov 2, 2026

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Responsibilities

Designing, developing, and maintaining software that operates directly on hardware systems
Working closely with hardware engineers to ensure seamless integration and optimal performance of embedded systems

Requirements

Experience in a Embedded Systems
Experience in a Wireless

Nice to have: Silicon Labs wireless SDKs, Silicon Labs Gecko SDK, Silicon Labs wireless stack APIs, Z-Wave 700/800 series, SmartStart, S2 security, OTA DFU mechanisms, Zniffer packet analysis, PTI packet tracing, Secure boot, Firmware signing, Key provisioning, Encrypted OTA updates, Secure pairing/authentication, Replay protection, Secure storage of credentials, Modular firmware architecture, State-machine design, Event-driven systems, Git workflows, CI/CD for firmware, Automated testing, Hardware abstraction layers, Documentation discipline

Skills

Embedded CBare-metal firmwareRTOS-based firmwareARM Cortex-M microcontrollersInterrupt-driven architecturesDMAtimerswatchdogsGPIOUARTSPII2CBootloadersFirmware update systemsDebugging with J-Link/SWD/GDBLow-power firmware designSilicon Labs EFR32 familyZ-WaveProprietary sub-GHz protocolsMesh networkingLow-power wireless sensor networksRF coexistenceOTA firmware updates over wirelessJ-LinkSWDGDBSilicon Labs SDKsSimplicity Studio

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Full description

Job Title: Embedded Software Engineer Job Duration: 12+ months contract Est. Pay Range: $70 to $75/hr on w2 Work Type: On Site Overview/ Responsibilities: Description: The Embedded Software Engineer is responsible for designing, developing, and maintaining software that operates directly on hardware systems. This role involves working closely with hardware engineers to ensure seamless integration and optimal performance of embedded systems. • Embedded C (mandatory) • Bare-metal and RTOS-based firmware • ARM Cortex-M microcontrollers • Interrupt-driven architectures • DMA, timers, watchdogs, GPIO, UART, SPI, I2C • Bootloaders and firmware update systems • Debugging with J-Link/SWD/GDB • Low-power firmware design The Silicon Labs EFR32 family is ARM Cortex-M33 based, so Cortex-M experience matters directly. Wireless Protocol Expertise (Critical) This is where average embedded developers get separated from actual RF/wireless experts. Required Wireless Experience You should strongly prefer candidates with experience in: • Z-Wave • Proprietary sub-GHz protocols • Mesh networking • Low-power wireless sensor networks • RF coexistence • OTA firmware updates over wireless Especially valuable: • Experience with Silicon Labs wireless SDKs • Experience modifying MAC/PHY behavior • Experience implementing custom protocol layers Silicon Labs / Z-Wave Specific Skills Because this is not just generic embedded work. Strongly Preferred Experience with: • Simplicity Studio • Silicon Labs Gecko SDK • Silicon Labs wireless stack APIs • Z-Wave 700/800 series • SmartStart • S2 security • OTA DFU mechanisms • Zniffer packet analysis • PTI packet tracing Security Skills (Increasingly Important) Modern wireless products require serious security awareness. Required or Preferred • Secure boot • Firmware signing • Key provisioning • Encrypted OTA updates • Secure pairing/authentication • Replay protection • Secure storage of credentials Especially important if: • HVAC • industrial • smart home • access-control • infrastructure markets Strongly Preferred • Modular firmware architecture • State-machine design • Event-driven systems • Git workflows • CI/CD for firmware • Automated testing • Hardware abstraction layers • Documentation discipline