> Markdown version of [/jobs/ext/4178153-senior-embedded-software-engineer](https://www.wearedevelopers.com/jobs/ext/4178153-senior-embedded-software-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Senior Embedded Software Engineer

- **Company:** Pentangle Tech
- **Location:** Hoffman Estates, IL, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Software Applications, ARM Architecture, User Authentication, C++ (Programming Language), Communications Protocols, Computer Engineering, Extract Transform Load (ETL), Software Debugging, Linux, Device Drivers, Middleware, Embedded Software, Firmware, Hardware Interface Design, Integrated Development Environments, Near Field Communication, Radio-Frequency Identification, Real-Time Operating Systems, Secure Coding, Smart Cards, Universal Asynchronous Receiver/Transmitter, PIC Microcontroller, State Machines, Information Technology, C++14
- **Published:** October 2, 2026
- **Apply:** https://www.disabledperson.com/jobs/75678437-senior-embedded-software-engineer

## About the Role

* 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

## Description

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., * 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.