Embedded Software Engineer - RFID/NFC

Job Description

Job Opportunity - Sr. Embedded Software Engineer

Location : Schaumburg, IL

Job Summary

We are seeking an experienced Senior Embedded Software Engineer to design, develop, and maintain production-quality firmware for next-generation secure NFC/RFID credential reader products. The ideal candidate will have strong expertise in modern C++ (C++17 or later), embedded microcontrollers, RTOS environments, and low-level driver development. This role focuses on embedded firmware engineering, hardware integration, performance optimization, and secure embedded systems.

Key Responsibilities

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• Design, develop, and maintain embedded firmware using C++17 or newer.
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• Develop and integrate low-level drivers for USB, UART, SPI, I2C, GPIO, DMA, and timers.
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• Implement embedded software modules, threads, state machines, and hardware interfaces.
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• Work with RTOS environments, preferably Zephyr RTOS, to integrate drivers, middleware, and application components.
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• Develop and enhance USB communication functionality, including CCID protocols.
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• Optimize firmware performance, memory usage, real-time behavior, and power consumption.
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• Implement robust error handling, recovery mechanisms, and secure coding practices.
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• Debug, test, and validate embedded firmware to ensure reliability, performance, and security.
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• Collaborate with cross-functional engineering teams to deliver production-ready firmware.
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Required Qualifications

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• Bachelor's degree in Computer Engineering, Electrical Engineering, Computer Science, or a related technical field.
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• 5+ years of experience in embedded firmware or embedded software development.
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• Strong proficiency in modern C++ (C++17 or later).
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• Hands-on experience with ARM Cortex-M microcontrollers, preferably Cortex-M4F.
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• Experience with STM32 microcontrollers, ideally the STM32G4 family.
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• Strong RTOS experience, preferably with Zephyr RTOS.
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• Proven experience in low-level programming, device drivers, and hardware interfacing.
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• Experience with USB stacks and communication protocols.
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• Familiarity with Embedded Template Library (ETL) and state-machine-based architectures.
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• Strong debugging, troubleshooting, and real-time system optimization skills.
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• Understanding of embedded security and secure firmware development practices.
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Preferred Qualifications

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• Experience with NFC, RFID, smart card, authentication, or credential reader products.
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• Familiarity with CCID (Chip Card Interface Device) protocols.
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• Experience developing security-sensitive embedded products.
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• Ability to take ownership of major firmware components and work independently within a collaborative engineering team.
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Technical Environment

C++17+, Zephyr RTOS, ARM Cortex-M4F, STM32G4 microcontrollers, USB/CCID, Embedded Template Library (ETL), Windows development environments, and Linux-based build and test systems.