Firmware/Embedded Engineer – Contract / Consulting Role

Butlr is on a mission to make the built environment people-aware by developing innovative technologies. They are seeking an experienced Firmware/Embedded Engineer to develop, optimize, and maintain embedded Linux-based gateway systems for IoT and edge applications, focusing on end-to-end firmware design and integration with cloud services.

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

Requirements:

• 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
• 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