Senior Firmware Engineer / FitnessTech

Motion Recruitment; Chicago (IL); On-site; USD 120,000 - 165,000; Full time

Benefits offered by this job

Medical, Dental, and Vision Insurance

Vacation Time

Stock Options

Job summary

Motion Recruitment is seeking a Senior Firmware Engineer, Connectivity, in the United States to join a fast-growing hardware and AI-focused team. You will design and ship BLE-enabled embedded software, optimize wireless performance, and contribute to tooling and testing for scalable device platforms.

The role emphasizes BLE expertise, C/C++ firmware on microcontrollers, and experience with OTA updates, low-power design, and multi-device BLE architectures.

Qualifications

• 5+ years of embedded software or firmware engineering experience.
• 3+ years building and shipping BLE-enabled products.
• Strong understanding of Bluetooth protocols including GAP, GATT, L2CAP, SMP, and BLE security.
• Expertise with C and/or C++ development on microcontrollers.
• Experience with embedded peripherals including UART, SPI, I2C, and DMA.
• Hands-on debugging experience using oscilloscopes, logic analyzers, and protocol sniffers.
• Experience deploying OTA firmware updates in production environments.
• Knowledge of low-power device optimization techniques.

Responsibilities

• Develop embedded firmware for BLE-enabled devices and platforms.
• Optimize wireless connectivity and RF performance.
• Build and maintain tooling and testing automation for firmware releases.

Skills

BLE

Embedded development

C/C++

Bluetooth protocols

Debugging

OTA firmware updates

Low-power optimization

Multi-device BLE architecture

Python or Node.js tooling

Tools

UART

SPI

I2C

DMA

Job description

A rapidly growing consumer hardware and AI company is seeking a Senior Firmware Engineer, Connectivity, to join their full-time engineering team. This role can be based in the United States and focuses on building next-generation connected devices that blend embedded systems, cloud technology, and machine learning. The ideal candidate will bring deep expertise in Bluetooth Low Energy (BLE), embedded development in C/C++, and wireless device architecture while helping scale a globally deployed product platform.

Required Skills & Experience

• 5+ years of embedded software or firmware engineering experience
• 3+ years building and shipping BLE-enabled products
• Strong understanding of Bluetooth protocols including GAP, GATT, L2CAP, SMP, and BLE security
• Expertise with C and/or C++ development on microcontrollers
• Experience with embedded peripherals including UART, SPI, I2C, and DMA
• Hands-on debugging experience using oscilloscopes, logic analyzers, and protocol sniffers
• Experience deploying OTA firmware updates in production environments
• Knowledge of low-power device optimization techniques

Desired Skills & Experience

• Nordic Semiconductor platform experience
• Zephyr or nRF Connect SDK experience
• Consumer electronics or IoT product experience
• Secure boot and embedded security knowledge
• Regulatory certification experience (FCC, CE, Bluetooth SIG)
• Manufacturing support experience
• Python or Node.js tooling experience
• Multi-device BLE architecture expertise

What You Will Be Doing

Tech Breakdown

• 70% Embedded Firmware Development
• 20% Wireless Connectivity & RF Optimization
• 10% Automation, Tooling & Testing

Daily Responsibilities

• 80% Hands-On Engineering
• 5% Leadership & Mentorship
• 15% Cross-Functional Collaboration

The Offer

• Bonus eligible

You Will Receive The Following Benefits

• Medical, Dental, and Vision Insurance
• Vacation Time
• Stock Options

Applicants must be currently authorized to work in the US on a full-time basis now and in the future.