Senior Java Developer Jobs in Middleton, WI (NOW HIRING)

At i3 Product Development, we are a place for people who love to build, learn, and stay curious, especially when the problems are complex. As a Senior Firmware Engineer, you will be part of ahigh-performingteam of designers, engineers, and problem solvers working together under one roof to turn ideas into real, functioning products.

Our projects spanthe medical, agricultural, industrial, consumer,healthand wellness, and on-andoff-roadrecreation industries, so the technical challenges are always evolving. One month,you might be architecting firmware for a connected embedded platform.Next, you couldbe optimizingperformance and power consumption on a resource-constraineddevice. With more than 100 projects each year, the work is varied,hands-on, and deeply collaborative.

About the Role

This role isidealfor engineers who enjoy technical depth, systems thinking, and cross-functional collaboration.As a senior engineer, you will shape and own firmware architecture, influence key hardware decisions, mentor teammates, and contribute from earlyconceptthrough product launch.You will strengthen our architectural foundations andestablishhigh engineering standards that scale with the growth and complexity of our projects.

We support our team with strong benefits, including a zero-deductible health plan, meaningful retirement match, and employee ownership,so you can focus on doinggreat workand growing your career.

What You Will Do

• Design and develop firmware for embedded products from concept through production

• Write andmaintainhigh-qualityC and C++ code

• Develop control algorithms and communication interfaces

• Collaborate closely with electrical engineers on hardware selection, boardbring-up, testing, and debugging

• Support system integration and product validation efforts

• Own and evolvefirmware architecture and technical direction

• Leadand drivedesign reviews and cross-functional technical discussions

• Mentor engineers and actively elevate team capability

• Continuously build your skills through varied project work and shared learning

Qualifications

• Bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering, or related discipline

• Sevenor more years of professional experience in embedded firmware development, including experience owning complex systems

• Deepproficiencyin C and C++

• Experience developing for32-bitmicrocontrollers and Single Board Computer platforms

• Experience developing in embedded Linux environments

• Experience using compilers, debuggers, and embedded development tools

• Working knowledge of Real Time Operating Systems

• Comfort using lab equipment such as oscilloscopes, logic analyzers, and digital multimeters

• Strong collaboration skills and a practical understanding of electrical engineering fundamentals

• Experience leading architectural decisions across multiple firmware projects

• Experienceestablishingor improving engineering standards and development processes

• Strong designdocumentation and technical communication skills

• Track recordof mentoring engineers and raising overall team capability

Nice to Have

• Experience withadditionalprogramming languages such as C#, Python, or Java

• Experience with communication protocols such as Wi Fi, Bluetooth, CAN, TCP/IP, SPI, or I2C

• Familiarity with tools such as Wireshark

• In-depthknowledge of Linux internals,including bootloaders, file systems, and kernel concepts

• Experience with build systems such asYoctoorBuildroot

• Experience in regulated industries such as medical

Why i3

At i3, Firmware Engineers do not work in isolation. You will collaborate closely with multidisciplinary teams, see your code move from prototype to production, and help shape products that make a real impact. We value curiosity, accountability, and engineers who care about both technical excellence and team success.

Benefits

• Health insurance with a zero-dollar deductible and employee premiums as low as nine dollars per pay period

• Dental and vision coverage

• 401(k) with a dollar-for-dollar match up to six percent

• Employee Stock Purchase Program

• Company paid short- and long-term disability insurance

• Company paid life insurance at two times your annual salary

• Flexible Spending Accounts and Health Savings Accounts

• Paid time off plus nine paid holidays

• Emergency Assistance Fund

• Charitable Match Program