Senior Wireless Firmware Engineer - BLE & Connectivity

Pentangle Tech Services | P5 Group; Milwaukee (WI); On-site; USD 120,000 - 160,000; Full time

Job summary

Pentangle Tech Services | P5 Group is seeking a Senior Firmware Engineer - Connectivity to design, implement, and validate wireless firmware that connects Milwaukee Tool products to the ONE-KEY ecosystem and the cloud. This contractor will collaborate across hardware, firmware, mechanical, product, cloud/app, and reliability teams to move features from concept through production release.

The role requires an experienced engineer who can work independently after orientation, diagnose cross-layer

Qualifications

• Bachelor’s degree in Computer Engineering, Computer Science, Electrical Engineering, or a related field.
• 5+ years of embedded firmware development using C++ on 32-bit ARM Cortex microcontrollers.
• Strong BLE experience: firmware development, integration, debugging, and troubleshooting.
• Experience designing, implementing, and debugging production bare-metal firmware, including interrupt handling, timing-critical behavior, peripheral drivers, and hardware interfaces.

Responsibilities

• Develop embedded C++ firmware for wireless connectivity on 32-bit ARM Cortex MCUs using bare-metal design.
• Implement, integrate, and debug Bluetooth Low Energy functionality using wireless modules or SoCs and vendor SDKs.
• Diagnose complex BLE connectivity issues spanning application firmware, drivers, the protocol stack, timing-sensitive behavior, and hardware interfaces.
• Translate product requirements into firmware specifications, design documents, test procedures, and implementation plans.
• Perform unit, functional, and integration testing, and contribute to test automation within CI/CD pipelines.
• Debug firmware and hardware interactions using JTAG/SWD, oscilloscopes, logic analyzers, and spectrum/protocol analyzers.
• Partner with hardware engineers and component suppliers on design decisions, integration, and root-cause investigations.
• Use Git and Azure DevOps for source control, work-item tracking, reviews, and CI/CD; participate in Agile development practices.
• Own assigned deliverables from technical investigation through implementation, validation, documentation, and handoff.
• Provide candid, timely status updates, elevate risks early, and track work against agreed milestones.

Skills

Embedded firmware development

Bluetooth Low Energy

ARM Cortex 32-bit

Bare-metal firmware design

Git & CI/CD tooling

Education

Bachelor’s degree in Computer Engineering, Computer Science, Electrical Engineering, or related field

Tools

Git

Azure DevOps

JTAG/SWD debugging

Job description

Pentangle Tech Services | P5 Group is seeking a Senior Firmware Engineer - Connectivity to design, implement, and validate wireless firmware that connects Milwaukee Tool products to the ONE-KEY ecosystem and the cloud. This contractor will collaborate across hardware, firmware, mechanical, product, cloud/app, and reliability teams to move features from concept through production release.

The role requires an experienced engineer who can work independently after orientation, diagnose cross-layer