Software Engineer Contract Jobs in Skokie, IL (NOW HIRING)

Job Title: Embedded Software Engineer (Firmware)

Job Description

This role focuses on designing, implementing, and delivering production-quality firmware for NFC/RFID credential reader devices within an established embedded framework. You will independently own one or more subsystems, contribute hands-on code, and collaborate closely with other engineers to integrate cleanly into the existing architecture. The position emphasizes modern C++ development for microcontrollers, real-time performance on Cortex-M4F, and robust driver-level firmware for secure access and authentication products.

Responsibilities

• Own the delivery of one or more embedded subsystems within the existing framework and credential reader application, from design through production release.
• Design and implement components, threads, and modules in modern C++ (C++17 and above) using a defined Module/Thread/Component framework.
• Implement ETL-based state machines and lifecycle hooks that meet hard real-time deadlines on Cortex-M4F microcontrollers.
• Develop, extend, and harden Device Abstraction Layer drivers for STM32G474, including SPI, I2C, USB, UART, GPIO, timers, and DMA.
• Extend and enhance the USB stack to support CCID and related functionality for secure credential readers.
• Perform memory, timing, and power optimization, validating against budgets using static analysis, profiling tools, and on-target measurement.
• Implement robust error handling, fault recovery, and safety-tolerant patterns consistent with a no-exceptions, no-heap-after-initialization policy.
• Balance feature delivery with technical risk by making sound architectural decisions within an established framework without rewriting it.
• Produce clean, maintainable code that meets established coding standards from the first day of engagement.
• Collaborate with other embedded and firmware engineers to integrate new features and subsystems smoothly into the broader platform.
• Validate firmware functionality through testing, debugging, and iteration to ensure reliable performance in production environments.
• Contribute to the development of a new generation of secure NFC/RFID reader products by supporting key project milestones as a contracted engineer.

Essential Skills

• Strong proficiency in modern C++ with experience in C++17 or later, and the ability to write high-quality, production-grade embedded code.
• Minimum of 5 years of hands-on firmware development experience focused on driver-level and low-level microcontroller programming (not application-level development).
• Demonstrated experience with real-time operating systems (RTOS), with Zephyr RTOS highly preferred.
• Practical experience developing firmware for microcontrollers, including Cortex-M4F and STM32G474 or similar devices.
• Strong understanding and practical experience with UART, USB, SPI, and I2C interfaces, with foundational to strong knowledge of USB as a core part of the work.
• Experience implementing and maintaining Device Abstraction Layer drivers for peripherals such as SPI, I2C, USB, UART, GPIO, timers, and DMA.
• Ability to implement ETL-based state machines and lifecycle hooks that meet hard real-time constraints.
• Experience with memory, timing, and power optimization in embedded systems, including use of static analysis, profiling, and on-target measurement tools.
• Proficiency in implementing error handling, fault recovery, and safety-tolerant patterns under a no-exceptions, no-heap-after-init policy.
• Good understanding of security concepts and secure firmware design, ideally gained in domains such as secure devices or authentication solutions.
• Bachelor's degree in Engineering or a related discipline.

Additional Skills & Qualifications

• Experience working with Zephyr RTOS in production environments.
• Familiarity with USB CCID or similar secure credential protocols.
• Experience with Linux-based development environments and toolchains.
• Exposure to enterprise environments where secure, passwordless access solutions are deployed.
• Ability to integrate quickly into existing codebases and frameworks while respecting established architectural boundaries.
• Strong problem-solving skills and the ability to work independently on deliverable-driven projects.

Job Type & Location

This is a Contract position based out of Roselle, IL.

Pay and Benefits

The pay range for this position is $55.00 - $70.00/hr.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: - Medical, dental & vision - Critical Illness, Accident, and Hospital - 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available - Life Insurance (Voluntary Life & AD&D for the employee and dependents) - Short and long-term disability - Health Spending Account (HSA) - Transportation benefits - Employee Assistance Program - Time Off/Leave (PTO, Vacation or Sick Leave)

Workplace Type

This is a fully onsite position in Roselle,IL.

Application Deadline

This position is anticipated to close on Jun 4, 2026.

About Actalent

Actalent is a global leader in engineering and sciences services and talent solutions. We help visionary companies advance their engineering and science initiatives through access to specialized experts who drive scale, innovation and speed to market. With a network of almost 30,000 consultants and more than 4,500 clients across the U.S., Canada, Asia and Europe, Actalent serves many of the Fortune 500.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

If you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing process due to a disability, please email actalentaccommodation@actalentservices.com for other accommodation options.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.