Preparation should be balanced between sharpening your low-level technical skills and reflecting on your past collaborative successes. Our interviews are designed to see how you think under pressure and how you handle the realities of product development.

Technical Competence – We expect a deep understanding of C/C++ and proficiency in scripting languages like Python. You should be prepared to discuss hardware abstraction layers, communication protocols (I2C, SPI, UART), and how you ensure system reliability.

System Thinking – It is not enough to write code that works; it must work within the context of our fitness equipment’s constraints. You will be evaluated on your ability to consider power management, latency, and hardware scalability during your design process.

Collaborative Problem Solving – You will work with diverse teams, including mechanical, electrical, and UI/UX designers. We look for candidates who can explain complex technical trade-offs to non-technical stakeholders and who approach conflicts with a solution-oriented mindset.

The hiring process for an Embedded Engineer is designed to be rigorous but transparent. We value your time, and our process is structured to ensure that both you and our team have a clear picture of how you would fit into our technical ecosystem. You can expect a logical progression that moves from high-level qualification to deep-dive technical evaluation.

The visual timeline above outlines our standard evaluation stages. Candidates should use this as a roadmap to pace their preparation, ensuring they are ready for both the initial coding assessments and the subsequent deep-dive technical discussions during the onsite rounds. Note that while the core structure remains consistent, the number of technical deep-dives can vary based on the specific seniority level of the role.

Firmware Development and Optimization

This area is the heartbeat of the Embedded Engineer role. We look for candidates who write robust, maintainable code that can withstand long-term use in demanding fitness environments.

Be ready to go over:

• Memory management and preventing leaks in long-running systems.
• Low-level driver development and interfacing with peripherals.
• State machine design for complex user interfaces.
• Advanced concepts: Power optimization strategies and over-the-air (OTA) update safety.

Example scenarios:

• "How would you design a failsafe mechanism for a treadmill motor controller?"
• "Explain your strategy for logging and diagnosing intermittent crashes in a production environment."

As an Embedded Engineer, your daily work will revolve around the lifecycle of our product firmware. You will be tasked with writing, testing, and debugging code that controls everything from resistance levels on Hammer Strength equipment to the interactive displays on Life Fitness cardio machines.

You will collaborate closely with hardware engineers to ensure that the software and electrical components communicate flawlessly. This involves participating in design reviews, performing code audits, and contributing to the technical documentation that keeps our systems maintainable. You will also spend time in the lab, physically testing your code against the hardware to ensure that the real-world performance matches your simulations.

We seek engineers who are as passionate about the quality of their code as they are about the quality of the user experience. You must be comfortable working in a fast-paced environment where physical hardware is the ultimate test of your software.

• Must-have skills: Proficiency in C/C++, experience with RTOS (Real-Time Operating Systems), and strong debugging skills using oscilloscopes or logic analyzers.
• Nice-to-have skills: Experience with embedded Linux, connectivity protocols (Bluetooth/Wi-Fi), and familiarity with automated testing frameworks.
• Experience: A strong background in consumer electronics or industrial automation is highly valued.

Q: How long does the process typically take? From the initial recruiter call to a final decision, the process usually spans 3 to 6 weeks. We strive to maintain a steady pace, but keep in mind that coordinating schedules for multiple team members during the onsite phase can influence the timeline.

Q: What is the most common reason candidates do not proceed? The most frequent hurdle is a lack of deep understanding regarding hardware-software integration. It is not enough to be a great coder; you must understand how your code interacts with the underlying physical components.

Q: Is the technical assessment difficult? The assessment is designed to be fair and representative of the work you will actually do. If you are comfortable with Python and standard embedded logic, you will find the assessment manageable provided you focus on efficiency and code readability.

Q: What is the culture like for engineers at Life Fitness / Hammer Strength? We value pragmatism, collaboration, and a "get it done" attitude. You will find a team that is passionate about fitness and takes great pride in the durability and performance of the equipment we ship to gyms worldwide.

• Understand the Product: Familiarize yourself with our current product lineup. Understanding how a user interacts with a Life Fitness console will help you answer design-related questions with greater context.
• Focus on Reliability: Always emphasize safety and reliability in your answers. In the fitness industry, equipment failure is not just an inconvenience; it is a safety concern.
• Structure Your Answers: When answering behavioral questions, use the STAR method (Situation, Task, Action, Result) to ensure your answers are concise and impactful.
• Ask Insightful Questions: At the end of your interviews, ask about the team’s current technical challenges, such as scaling connectivity or improving power efficiency. This shows you are already thinking like a team member.

Becoming an Embedded Engineer at Life Fitness / Hammer Strength is an opportunity to leave a mark on the fitness industry. By focusing on your core firmware competencies, demonstrating a deep understanding of hardware-software integration, and showcasing a collaborative spirit, you will be well-positioned to succeed throughout the interview process.

We encourage you to review the concepts outlined in this guide and leverage your practical experience to provide concrete examples during your discussions. Your preparation is the single most important factor in your performance. We wish you the best of luck in your journey toward joining our team.