A Software Engineer at Neptune Medical plays a critical role in designing, developing, and scaling advanced medical device technologies. Operating at the intersection of robotics, embedded systems, and hardware-software integration, software professionals here build the foundational platforms that power next-generation clinical devices. The work is highly interdisciplinary, requiring seamless collaboration with mechanical, electrical, and systems engineering teams to translate complex clinical needs into high-performing, reliable software solutions.

At Neptune Medical, your code directly impacts patient safety and clinical outcomes. Whether you are developing real-time control algorithms for a robotics platform, optimizing embedded Linux systems, or designing robust software architectures, your contributions ensure that medical devices operate with extreme precision and reliability. The challenge lies in balancing rapid innovation with the rigorous validation and regulatory standards essential for life-saving medical technology.

This role is ideal for engineers who thrive in highly collaborative, fast-paced environments and are passionate about solving complex physical-world problems through software. By joining Neptune Medical, you will work on cutting-edge systems that push the boundaries of what is possible in minimally invasive medicine, making this both a technically demanding and deeply rewarding career path.

The questions you will encounter during the Neptune Medical hiring process are designed to evaluate your technical depth, problem-solving methodologies, and ability to work within a highly regulated engineering environment. While these questions are representative of real interview experiences, they are structured to test your underlying engineering principles rather than memorized answers.

Verification, Validation, and Statistical Analysis

Because Neptune Medical develops regulated medical devices, engineers must demonstrate a strong understanding of how to test, validate, and mathematically analyze system performance.

• How do you design a validation protocol for a software control loop on a robotic medical device?
• Explain a time when you used statistical analysis to identify a failure mode or optimize a system's performance. What statistical tools or distributions did you use?

To succeed in the Neptune Medical interview process, you must approach your preparation with a holistic engineering mindset. Technical proficiency in coding is only one part of the equation; you must also demonstrate system-level thinking, rigorous testing practices, and strong communication skills.

Technical Rigor & Domain Expertise – You must show a deep understanding of your primary engineering domain, whether that is embedded Linux, systems architecture, or hardware integration. Be ready to explain the "why" behind your technical decisions, including trade-offs in performance, memory, and safety.

Verification & Validation Mindset – Working in medical devices means your software must be highly reliable and thoroughly documented. You should be prepared to discuss how you write testable code, design validation protocols, and use statistical analysis to prove your system meets its requirements.

Systems-Level Thinking – Interviewers will evaluate how well you understand the interaction between your software and the physical hardware. You should be able to trace a clinical requirement down to the electrical signals, sensor inputs, and mechanical outputs of the device.

Collaborative Communication – The interview process heavily emphasizes your ability to present your work and collaborate with a panel of engineers from various disciplines. Clear, structured communication is vital, especially when defending your design choices during the presentation stage.

The interview process at Neptune Medical is rigorous, thorough, and highly structured to evaluate both your technical capabilities and your ability to work within a multidisciplinary team. The process typically begins with an initial phone screen with a recruiter or hiring manager to discuss your background, career goals, and alignment with the company's mission.

If you pass the initial screen, you will proceed to the onsite interview phase. This stage is designed to simulate the collaborative and cross-functional environment of Neptune Medical. It begins with a 45-minute technical presentation where you present a past project to a panel of engineers, followed by a Q&A session. This is followed by multiple 45-minute panel interviews featuring both technical and non-technical team members.

The interview timeline is designed to move efficiently while ensuring a comprehensive evaluation. The initial phone screen establishes baseline technical alignment, while the onsite presentation and panel interviews dive deep into your engineering depth, problem-solving skills, and cross-functional communication. Candidates should prepare to engage deeply with multiple interviewers during each panel session.

To excel at the Neptune Medical interview, you must understand the specific competencies the engineering team evaluates during the onsite panels.

Technical Presentation & Q&A

The 45-minute presentation is the most critical component of your onsite interview. It is your opportunity to showcase your engineering depth, problem-solving methodology, and communication skills to a cross-functional panel.

Be ready to go over:

• Project Scope and Ownership – Clearly define your individual contributions to a complex engineering project, highlighting the challenges you personally solved.
• Design Decisions and Trade-offs – Explain why you chose specific software architectures, tools, or methodologies, and what alternatives you considered.
• Validation and Testing – Describe how you verified that your design met its performance and safety requirements, including any statistical analysis performed.

Example scenarios:

• Presenting a robotic control system you designed, detailing how you handled sensor noise and latency.
• Walking the panel through a complex software-hardware integration project, explaining how you debugged system-level failures.

Validation and Statistical Analysis

For any engineering role at Neptune Medical, demonstrating a structured approach to testing, verification, and data analysis is non-negotiable.

Be ready to go over:

• Design Verification & Validation (V&V) – Understanding how to translate product requirements into actionable test cases and validation protocols.
• Statistical Methods – Utilizing statistical tools (such as hypothesis testing, confidence intervals, and capability analysis) to analyze test data and ensure system reliability.
• Root Cause Analysis – Systematically diagnosing system failures and using data to prove that a corrective action is effective.
• Advanced concepts – Design of Experiments (DOE), gauge repeatability and reproducibility (Gauge R&R), and statistical process control (SPC) in a medical device manufacturing environment.

Example questions:

• "How would you determine the sample size required to validate a new software feature on a robotic catheter system?"
• "Describe a time when statistical analysis revealed an underlying hardware issue that software needed to mitigate."

Systems and Hardware Integration

Software at Neptune Medical does not run in a vacuum; it controls precise physical hardware. Interviewers will assess your ability to bridge the gap between code and physical mechanics.

Be ready to go over:

• Hardware-Software Interfaces – Experience working with communication protocols (SPI, I2C, CAN, Ethernet) and debugging physical signals using oscilloscopes or logic analyzers.
• Embedded Linux & RTOS – Developing software within resource-constrained environments, managing interrupts, and optimizing real-time threads.
• Control Systems – Understanding feedback loops, sensor integration, and motor control principles.

Example questions:

• "How would you diagnose a communication lag between the primary Linux controller and an end-effector actuator?"
• "What steps do you take to guarantee deterministic behavior in a safety-critical embedded application?"