Senior Firmware Engineer / FitnessTech
Chicago, IL, US
Information Technology
Direct Hire, Direct Hire
$160000 - $180000
On-site
Other/Non Classified
Chicago, IL, US
$160000 - $180000
Direct Hire, Direct Hire
Other/Non Classified
On-site
Information Technology
Job details
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.
This is a unique opportunity to become the primary technical owner of wireless connectivity for a category-defining consumer product. The engineer joining this team will influence architecture decisions, firmware update strategy, power optimization efforts, manufacturing validation, and customer-facing reliability initiatives. Candidates who enjoy solving difficult challenges across firmware, RF, hardware, and mobile environments will find significant growth opportunities and ownership in this position.
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.
#LI-EM1
I want more jobs like this in my inbox.
About Kelly
Work changes everything. And at Kelly, we’re obsessed with where it can take you. To us, it’s about more than simply accepting your next job opportunity. It’s the fuel that powers every next step of your life. It’s the ripple effect that changes and improves everything for your family, your community, and the world. Which is why, here at Kelly, we are dedicated to providing you with limitless opportunities to enrich your life—just ask the 300,000 people we employ each year.Kelly is committed to providing equal employment opportunities to all qualified employees and applicants regardless of race, color, sex, sexual orientation, gender identity, religion, national origin, disability, veteran status, age, marital status, pregnancy, genetic information, or any other legally protected status, and we take affirmative action to recruit, employ, and advance qualified individuals with disabilities and protected veterans in the workforce. Requests for accommodation related to our application process can be directed to the Kelly Human Resource Knowledge Center. Kelly complies with the requirements of California’s state and local Fair Chance laws. A conviction does not automatically bar individuals from employment. Kelly participates in E-Verify and will provide the federal government with your Form I-9 information to confirm that you are authorized to work in the U.S.
Kelly may use AI-powered tools during the recruitment and hiring process. For full details, including how Kelly uses AI, your rights, and how to request a reasonable accommodation, visit the Recruitment Artificial Intelligence Notice.