Firmware Developer

Description
Work Mode: Onsite 5 days/week
Contract Type: W2 Contract-to-Hire (minimum 6 months)
About the Role
We are seeking two skilled Mid-Level Software Developers to join a highly collaborative, cross-functional team responsible for C++-based firmware and embedded software development. This role is ideal for developers who enjoy working close to the hardware layer while still contributing to larger, software-driven building platforms.
You will work in an agile development environment, partnering with firmware engineers, test engineers, and Product Owners to deliver high-quality, production-ready code that directly impacts smart building products.
Day-to-Day Responsibilities
Investigate, diagnose, and resolve firmware defects in a large, established C++ codebase
Evaluate production issues and determine root cause across software and controller behavior
Perform targeted fixes focused on correctness, stability, and regression safety
Contribute minor enhancements or configuration changes (not large new features)
Identify opportunities for process or test automation to improve efficiency
Participate in agile ceremonies (standups, backlog refinement)
Reality check: This role rewards engineers who like problem-solving, system understanding, and technical cleanliness, not constant feature creation.
Key Responsibilities
Embedded & Firmware Software Development
- Design, develop, and maintain C++ software running on embedded platforms and firmware-level systems.
- Implement efficient, reliable code suitable for resource-constrained environments where memory, timing, and stability are critical.
- Contribute across the full development lifecycle, from initial concept through deployment and long-term product maintenance.
- Why this matters: Siemens building systems run continuously for years and often control safety-critical operations. Firmware quality and deterministic behavior are essential to ensure reliability in real-world deployments.
Cross-Functional Collaboration
- Work closely with hardware engineers, QA/testing teams, and systems engineers to ensure software aligns with hardware capabilities and system requirements.
- Collaborate with Product Owners and business stakeholders to clarify requirements and translate them into practical technical solutions.
- Why this matters: Siemens Smart Infrastructure products integrate hardware, firmware, and higher-level software into a single solution. Effective collaboration ensures seamless system integration and reduces costly rework later in the product lifecycle.
Agile Development & Continuous Improvement
- Actively participate in agile ceremonies (planning, reviews, retrospectives) and contribute to iterative delivery of features and improvements.
- Adapt quickly to evolving requirements and shifting priorities while maintaining software quality.
- Why this matters: Siemens relies on agile methods to continuously evolve its smart building platforms while meeting customer and regulatory demands in a fast-moving, technology-driven market.
Testing, Documentation & Proof of Concepts
- Develop unit tests and support system-level testing to ensure robustness and long-term maintainability.
- Create technical documentation that clearly explains design decisions, implementations, and usage.
- Prepare and present proofs of concept (PoCs) to demonstrate feasibility, performance, or architectural approaches.
- Why this matters: Building infrastructure software has long lifecycles. Clear documentation and well-tested code are critical for maintainability, regulatory compliance, and future product evolution.
Required Qualifications
Core Technical Skills
- Strong C++ development experience, ideally in embedded or system-level environments.
- Practical experience with firmware or embedded systems development, including working close to hardware.
- Familiarity with writing code for performance-sensitive, real-time, or resource-limited systems.
Siemens Smart Infrastructure solutions depend on firmware that is efficient, predictable, and secure-qualities best delivered by developers with deep C++ and embedded experience.
Development Practices
- Experience working within an agile development team.
- Hands-on involvement in coding, testing, debugging, and documentation throughout the software lifecycle.
Communication & Collaboration
- Strong communication skills with the ability to engage both technical and non-technical audiences.
- Comfort working with Product Owners and business stakeholders to understand functional goals and constraints.
Preferred / Nice-to-Have Skills
- Python or scripting experience for tooling, automation, or test support.
- Exposure to RTOS, low-level system software, or device communication protocols.
- Understanding of software quality practices, such as unit testing, code reviews, and static analysis.
- Experience contributing to products with long lifecycles and high reliability requirements.
These skills support Siemens' focus on scalable, secure, and maintainable smart infrastructure solutions deployed at enterprise scale.
Onsite Expectation
Skills
C++, embedded software, Firmware, Agile, Github, Gitlab, Python
Top Skills Details
C++,embedded software,Firmware,Agile,Github,Gitlab
Additional Skills & Qualifications
Key Responsibilities:
Develop and maintain software using C++ for firmware and embedded systems.
Collaborate with cross-functional teams, including development and testing, to deliver high-quality solutions.
Communicate effectively with Product Owners and business stakeholders to understand requirements and provide technical insights.
Participate in coding, testing, documentation, and presenting proof of concepts.
Contribute to the preparation and presentation of technical documentation and reports.
Qualifications:
Proven experience in C++ development.
Hands-on experience with firmware and embedded development.
Ability to work effectively as part of an agile team.
Strong communication skills, with the ability to interact with Product Owners and business stakeholders.
Experience in coding, testing, documentation, and presenting proof of concepts.
Knowledge of Python and other scripting languages is a plus.
Preferred Skills:
Familiarity with agile methodologies and practices.
Strong problem-solving skills and a solutions-oriented mindset.
Qualifications
4-5+ years of professional experience in C++ firmware or embedded systems
Proven ability to navigate and learn large legacy codebases quickly
Strong debugging, root-cause analysis, and issue isolation skills
Self-starter mentality with low tolerance for heavy onboarding support
Comfortable working largely autonomously
Local to Chicagoland (onsite required)
Technical Environment
C++ (firmware / embedded)
Microsoft Visual Studio
GitHub / GitLab
Python or scripting (nice to have, especially for automation)
Experience Level
Expert Level
Job Type & Location
This is a Contract to Hire position based out of Buffalo Grove, IL.
Pay and Benefits
The pay range for this position is $51.00 - $61.00/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 hybrid position in Buffalo Grove,IL.
Application Deadline
This position is anticipated to close on Apr 15, 2026.
>About TEKsystems:
We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

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

About TEKsystems and TEKsystems Global Services

We're a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We're a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

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.