Senior Embedded Software Engineer at Pentangle Tech Services | P5 Group Senior Embedded Software Engineer at Pentangle Tech Services | P5 Group in Roselle, Illinois Posted in about 14 hours ago.

Type:

full-time Overview We are seeking a Senior Embedded Software Engineer to support the development of next-generation secure

NFC/RFID

credential reader products. This individual will be responsible for designing, developing, and delivering production-quality embedded firmware within an established software framework. The ideal candidate has strong hands-on experience with modern C++, embedded microcontrollers, RTOS environments, and low-level driver development. This is a highly technical firmware role focused on embedded systems rather than application software. Key Responsibilities Design, develop, and maintain embedded firmware using C++17 or newer. Develop low-level drivers and hardware interfaces including:

USB UART SPI I2C GPIO DMA

Timers Implement and enhance embedded software components, modules, threads, and state machines. Work within an RTOS environment (Zephyr preferred) to integrate drivers, middleware, and application functionality. Extend and support USB functionality, including CCID-related protocols. Optimize firmware performance, memory utilization, timing, and power consumption. Implement robust fault handling, recovery mechanisms, and secure coding practices. Collaborate with cross-functional engineering teams to integrate firmware into the broader product architecture. Deliver production-ready firmware that meets performance, reliability, and security requirements. Required Qualifications Bachelor's degree in Engineering, Computer Engineering, Computer Science, or related technical field. 5+ years of embedded firmware development experience. Strong expertise in modern C++ (C++17 or later). Experience developing firmware on ARM Cortex-M microcontrollers, preferably Cortex-M4F. Hands-on experience with STM32 microcontrollers, ideally the STM32G4 family. Solid RTOS experience, with Zephyr RTOS strongly preferred. Strong background in low-level embedded development and device driver implementation. Experience working with USB stacks and USB communication protocols. Familiarity with Embedded Template Library (ETL) and state-machine-based architectures. Experience debugging and optimizing real-time embedded systems. Understanding of secure firmware development and embedded security concepts. Preferred/Desired Background Experience with NFC, RFID, smart card, authentication, or credential reader products. Experience in security-sensitive industries or products. Familiarity with CCID (Chip Card Interface Device) protocols. Experience working in senior-level embedded engineering roles where ownership of major subsystems is expected. Ability to work independently while collaborating effectively with larger engineering teams. Technical Environment Modern C++ (C++17+) Zephyr

RTOS ARM

Cortex-M4F STM32G4 Microcontrollers

USB / CCID ETL

(Embedded Template Library) Windows development environment with Linux-based build and test systems