Senior Firmware Engineer – Connectivity

Job Title: Senior Firmware Engineer – Connectivity

Location: Milwaukee, Wisconsin

Job Summary

We are seeking an experienced Senior Firmware Engineer – Connectivity to design, develop, integrate, and validate wireless firmware for embedded products connected to the ONE-KEY™ ecosystem and cloud platforms. The ideal candidate will have strong experience in embedded C++, ARM Cortex microcontrollers, Bluetooth Low Energy (BLE), and bare-metal firmware development.

Key Responsibilities

• Develop embedded C++ firmware for wireless connectivity on 32-bit ARM Cortex microcontrollers using bare-metal architecture.
• Implement, integrate, debug, and troubleshoot Bluetooth Low Energy (BLE) functionality using wireless modules, SoCs, and vendor SDKs.
• Diagnose complex connectivity issues involving application firmware, drivers, BSP, protocol stacks, timing, and hardware interfaces.
• Translate product requirements into firmware specifications, design documents, test plans, and implementation strategies.
• Perform unit, functional, and integration testing, and support test automation within CI/CD pipelines.
• Debug firmware and hardware interactions using JTAG/SWD debuggers, oscilloscopes, logic analyzers, and spectrum or protocol analyzers.
• Collaborate with hardware, mechanical, cloud, application, product, and reliability teams to resolve technical issues and deliver production-ready firmware.
• Work with component suppliers on hardware integration, design decisions, and root-cause analysis.
• Use Git and Azure DevOps for source control, work-item tracking, code reviews, and CI/CD activities.
• Own firmware deliverables from investigation and implementation through validation, documentation, and production handoff.
• Participate in Agile development practices, provide regular progress updates, and proactively communicate risks and project status.

Required Qualifications

• Bachelor’s degree in Computer Engineering, Computer Science, Electrical Engineering, or a related field.
• 5+ years of embedded firmware development experience using C++.
• Strong hands-on experience with 32-bit ARM Cortex microcontrollers.
• Proven experience developing and debugging production bare-metal firmware.
• Strong Bluetooth Low Energy (BLE) experience, including firmware development, integration, debugging, and troubleshooting.
• Experience with interrupt handling, timing-critical operations, peripheral drivers, and hardware interfaces.
• Proficiency in embedded debugging using JTAG/SWD and hardware diagnostic tools.
• Experience with Git, Azure DevOps, and CI/CD workflows.
• Strong troubleshooting, problem-solving, communication, and cross-functional collaboration skills.

Preferred Qualifications

• Experience with wireless modules, BLE SoCs, and vendor-specific SDKs.
• Knowledge of embedded communication protocols and low-level hardware interfaces.
• Experience with automated firmware testing and production release processes.
• Experience working in Agile development environments.
• Ability to work independently and manage technical deliverables from concept through production.

Key Skills

Embedded C++, Bluetooth Low Energy (BLE), ARM Cortex MCUs, Bare-Metal Firmware, Embedded Systems, Wireless Connectivity, BSP, Device Drivers, JTAG/SWD, Oscilloscopes, Logic Analyzers, Git, Azure DevOps, CI/CD, Firmware Testing, Root Cause Analysis.