Wireless Software/Firmware Engineer (Bluetooth or Zigbee) – Contract, Onsite

An established engineering organization supporting regulated product development is seeking a Wireless Software/Firmware Engineer to design, develop, and verify embedded software running on microcontrollers and embedded processors. This is an on-site contract role in the St. Petersburg, Florida area with a targeted start in early March 2026.

Work Model and Duration:
On-site in the St. Petersburg, FL area
Contract length: 8 months
Target start date: March 2, 2026
Core hours: 9:00 AM to 3:00 PM with flexibility to complete an 8-hour day around core hours

Compensation:
Target pay rate: $40 - $50/hour

• What You Will Do:
  Design, develop, and verify embedded software/firmware on 8-bit, 16-bit, and 32-bit microcontrollers and embedded processors
• Implement wireless connectivity features using Bluetooth and/or Zigbee stacks
  Define and follow software design principles and development processes in day-to-day work
• Create software deliverables across the lifecycle, including requirements, architecture, detailed design, implementation, and unit and integration testing
• Develop and execute effective software verification tests to support stability and performance
• Perform white-box, requirements-based testing and document results
• Troubleshoot issues across hardware and software, including electromechanical system-level problems
• Identify, document, prioritize, and resolve software issues at the unit level
• Write clear technical documentation for work performed
• Partner with cross-functional teams and work with a manager and/or project manager to support estimation inputs for RFI/RFQ activities
• Provide input on technical risks and mitigation approaches
• Execute sub-project level tasks with limited day-to-day support while coordinating with larger project teams

Required Qualifications:

• Strong C and C++ proficiency in embedded development
• Strong Bluetooth and/or Zigbee Stack Experience
• Experience with Nordic platforms and Sepher OS
• Experience with white-box, requirements-based software testing
• Electromechanical design troubleshooting experience in hardware/software systems
• Understanding of design principles and design testing principles
• Experience developing firmware for embedded processors and microcontrollers, including unit and integration testing

Preferred Qualifications:

• Bluetooth and/or Zigbee mesh networking experience
• Gateway design experience
• Database concepts
• Experience with software planning, requirements, architecture, design, implementation, and integration
• Medical device design experience, including FDA and IEC 62304 processes
• Python scripting for test automation
• Git and ALM tools such as Azure DevOps or Jira
• Agile methodology experience

Interview Process:
The interview process is expected to move quickly due to an immediate need and an early March start.

Ascendo is a certified minority owned staffing firm, and we welcome and celebrate diversity. Ascendo is an Equal Opportunity Employer and does not discriminate on the basis of race, color, religion, sex (including pregnancy and gender identity), national origin, political affiliation, sexual orientation, marital status, disability, genetic information, age, parental status, military service or any other characteristic protected by federal, state or local law.

Contact information

Christian Kincer