Jobs › Plexus

Intern - Software Engineer (Spring 2027)

Plexus · Neenah, WI · $23.00–$27.00 an hour · Full time

Posted Aug 25, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about a software project you are proud of. What did you build, and what was hard?

What they are checking: Whether they have built something real and can explain their own technical decisions.

Tell me about a time you received critical feedback on your code. What did you do with it?

What they are checking: Whether they take code review well and learn from it.

What do you want to get out of a fall co-op at Plexus?

What they are checking: Whether they have clear goals and real interest in product development work.

What would you do

Software for a surgical or medical device must be very reliable. How would that change how you write and test code?

What they are checking: Whether they understand that regulated products need careful testing, reviews and documentation.

You are stuck on a bug for a full day. What do you do?

What they are checking: Whether they know when and how to ask for help instead of spinning in silence.

About the work

What languages are you most comfortable in, and have you written code that runs on embedded hardware?

What they are checking: Whether they have exposure to C or embedded work common in product development for medical and industrial devices.

Explain what a microcontroller interrupt is and when you would use one.

What they are checking: Whether they understand basic embedded concepts that come up in firmware work.

How do you debug a program that works on your laptop but fails on the target device?

What they are checking: Whether they can reason about environment differences like timing, memory and hardware.

How do you use Git when working on a team project?

What they are checking: Whether they can work in shared code with branches and reviews without causing problems.

How would you write a test for a function that reads a sensor value and decides whether to raise an alarm?

What they are checking: Whether they think about edge cases and testability, including how to fake hardware inputs.

Practice this interview out loud.

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The full job description

As published by Plexus.

About us: At Plexus, our vision is to help create the products that build a better world. Driven by a passion for excellence, we partner with leading Aerospace/Defense, Healthcare/Life Sciences and Industrial companies to design, manufacture and service some of the world’s most transformative products, including advanced surgical systems, diagnostic instruments, healthcare imaging equipment, mission critical aerospace systems, and electric vehicle (EV) charging solutions. Visit Plexus.com to learn more about our unwavering commitment to our vision. When we invest in our people, we invest in building a better world. With a vision rooted in the wellbeing and inclusive engagement of our team members, our customers, their end users and our communities, people are the heart of what we do and who we are. It is our values that unite us and guide us in everything that we do, including how we operate, behave and interact to foster a workplace where every team member feels valued and empowered to contribute their best. Our values include: Growing our People, Building Belonging, Innovating Responsibly, Delivering Excellence and Creating Customer Success. As a team member, you will engage in impactful work through global collaboration and the use of emerging technologies, join an inclusive culture where every team member is valued and working toward a greater purpose, and be empowered to reach your full potential through various development programs designed to accelerate your growth. Plexus offers a comprehensive benefits package designed to support team members' wellbeing, including medical, dental, and vision insurance, paid time off, retirement savings, and opportunities for professional development. We also prioritize work-life balance and offer a variety of perks to enhance the team member experience. For more information, visit our US benefits website at usbenefits.plexus.com . Our commitment to pay range transparency fosters an equitable workplace, where everyone can feel valued. This is an internship position (Non-Exempt Salary); the hourly range is stated below. The rate offered within this range will be based upon the geographic location, work experience, education, licensure requirements and/or skill level. Hourly Rate: $23 - $27/hr. OVERVIEW To perform embedded software engineering design services and other related software development support services throughout all stages of the product development life cycle. RESPONSIBILITIES • Design and develop embedded software and system concepts that satisfy the customer's requirements • Maintain and deliver controlled software releases to customers by utilizing appropriate configuration management tools • Develop and execute software design verification test plans per requirements specifications to ensure software meets the requirements • Demonstrate proficiency using lab equipment and debug techniques MINIMUM QUALIFICATIONS • Student working toward a Bachelor’s degree in Computer Engineering or Software Engineering for the entire duration of internship. PREFERRED QUALIFICATIONS • GPA: 3.0 or higher is preferred This document does not represent a contract of employment and is not intended to capture every possible assignment the incumbent could be asked to perform. We are pleased to provide reasonable accommodations to individuals with disabilities or special requirements. If you need an application accommodation, please contact us by email at GHQ.TA@plexus.com . Please include your contact information and clearly describe how we can help you. This email is for accommodation requests only and cannot be used to inquire about the status of applications. We are an Equal Opportunity Employer (EOE) and do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. Some offers of employment are contingent upon successfully passing a drug screen and/or background check.

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