Bluetooth Firmware Software Engineer

Job Summary

The Bluetooth Software/Firmware Design Engineer is a self‑motivated engineer who designs, develops, and verifies wireless solutions for medical devices that communicate with mobile platforms and gateways. This role focuses on implementing the Bluetooth Low Energy (BLE) stack on Nordic Semiconductor hardware using the Zephyr RTOS. You will define software design principles, write high‑performance C/C++ code, and optimize the firmware for reliability, secure bonding, and ultra‑low power consumption.

Location:

St. Petersburg, Florida
Job Type: Contract
Salary: $45–52 per hour

Work Hours:

9 am to 5 pm

Education:

Bachelor’s degree

• Strong C, C++:
  Deep experience in embedded firmware development.
• Bluetooth Stack Mastery:
  Specific expertise in BLE (Bluetooth Low Energy), including GATT/GAP profile design, advertising/connection parameter tuning, and throughput optimization.
• Nordic & Zephyr OS:
  Hands‑on experience with the nRF Connect SDK (NCS) and the Zephyr RTOS kernel.
• White‑Box Testing:
  Rigorous unit and integration testing of the Bluetooth stack logic.
• Wireless Troubleshooting:
  Ability to use BLE sniffers and logic analyzers to debug RF timing and connectivity issues.
• Electromechanical Troubleshooting:
  Understanding of how firmware interacts with physical hardware and sensors.

• Bluetooth Mesh:
  Experience with multi‑node mesh network architectures.
• Cybersecurity & Bonding:
  Experience with secure pairing, encryption, and HIPAA‑compliant data transmission.
• Mobile Interoperability:
  Understanding of BLE behavior across iOS and Android ecosystems.
• Medical Device Design:
  Direct experience with IEC 62304 processes and risk management.
• Python Scripting:
  For automating Bluetooth range, stress, and regression testing.
• Application Life Cycle:
  Use of Git and tools like Azure Dev Ops or JIRA.

• Protocol Optimization:
  Ensure seamless connectivity and data integrity between medical devices and mobile apps.
• Power Management:
  Tune Bluetooth parameters (MTU size, connection intervals) to maximize battery life for wearable medical tech.
• Estimation & Planning:
  Work with the manager/PM to provide technical data for RFI/RFQ processes.
• Documentation:
  Write clear, concise technical documentation that meets medical audit standards.
• Verification:
  Develop and run software verification tests to ensure the Bluetooth link is stable under various interference conditions.
• Risk Mitigation:
  Identify and resolve software issues at the unit level to prevent project delays.

Equal Opportunity

Employer:

Race, Color, Religion, Sex, Sexual Orientation, Gender Identity, National Origin, Age, Genetic Information, Disability, Protected Veteran Status, or any other legally protected group status.

At Randstad Digital, we welcome people of all abilities and want to ensure that our hiring and interview process meets the needs of all applicants. If you require a reasonable accommodation to make your application or interview experience a great one, please contact us.

Pay offered to a successful candidate will be based on several factors including the candidate's education, work experience, work location, specific job duties, certifications, etc. In addition, Randstad Digital offers a comprehensive benefits package, including medical, prescription, dental, vision, AD&D, and life insurance offerings, short‑term disability, and a 401K plan (all benefits are based on eligibility).

This posting is open for thirty (30) days.