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Butlr · 1 month ago

Firmware/Embedded Engineer – Contract / Consulting Role

United States

Contract

Remote

Senior Level

$100/hr - $120/hr

5+ years exp

Butlr is a company focused on making the built environment more aware of its inhabitants. They are seeking an experienced Firmware/Embedded Engineer to develop, optimize, and maintain embedded Linux-based gateway systems for IoT and edge applications, involving end-to-end firmware design and integration with cloud services.

Artificial Intelligence (AI)ElectronicsMachine LearningSensorSoftware

H1B Sponsor Likely

Responsibilities

Build and customize Linux OS images (Yocto or Debian-based)

Integrate kernel modules, device drivers, and BSPs

Optimize boot time, memory, and power usage for embedded devices

Implement and manage Ethernet, Wi-Fi, LTE/4G, and PoE networking

Configure DHCP, DNS, MQTT, HTTP/HTTPS, NAT, and firewall rules

Ensure stable and secure connectivity with automatic recovery (99% uptime target)

Develop C/C++/Python services for data acquisition, buffering, and routing

Integrate edge ML models and cloud middleware (AWS, MQTT, REST APIs)

Manage local storage, caching, and retry logic for intermittent networks

Implement secure boot, signed firmware, and integrity checks

Manage certificates, keys, and access control

Support OTA firmware updates with rollback protection

Design system health telemetry (CPU, memory, connectivity, temperature)

Create watchdogs, auto-recovery scripts, and remote logging/debugging (jFrog, syslog)

Support remote firmware updates and diagnostics

Develop and automate unit/integration tests

Collaborate with QA on test execution and system validation

Bring up and test peripherals (Wi-Fi, LTE, USB, GPIO)

Integrate and test Linux drivers (Qualcomm and custom)

Validate sensor and RF interfaces

Profile CPU, memory, and I/O performance

Tune kernel and network parameters for reliability and throughput

Optimize flash storage and file system usage

Develop clients for MQTT, HTTPS, and WebSockets

Handle device provisioning and cloud connectivity (AWS IoT Core, Azure)

Support remote configuration and edge analytics modules

Work cross-functionally with hardware, QA, and cloud teams

Participate in code/architecture reviews

Document system architecture and deployment guides

Qualification

Embedded LinuxC/C++/PythonYoctoCloud-IoT integrationNetworking stacksOTA updatesSecure bootDevice driversSystem architectureCollaboration

Required

Strong C/C++/Python skills in embedded Linux environments

Hands-on experience with Yocto, BSPs, and networking stacks

Familiarity with OTA updates, secure boot, and cloud-IoT integration

5-10+ years related experience