Senior Full Stack Java Developer

i3 Product Development; Town of Sun Prairie (WI); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Health insurance

401(k) match

Employee Stock Purchase Program

Paid time off

Job summary

i3 Product Development, part of Helios Technologies, is seeking a Senior Java Developer to join a multidisciplinary team.

You will build cloud platforms and IoT solutions, collaborating across software, firmware, and design to turn ideas into production-ready products. The role emphasizes problem-solving, end-to-end delivery, and ongoing platform improvements within an Agile environment.

Qualifications

• Bachelor's degree in Computer Science or related field or equivalent practical experience.
• Five+ years of professional development experience.
• Experience developing RESTful APIs.
• Cloud development languages or frameworks such as Java, Python or TypeScript.
• Familiarity with cloud tools, debugging, testing practices.
• Experience using Git and Agile teams.

Responsibilities

• Design, develop, test, and maintain cloud platforms written in Java and AWS tools.
• Collaborate with product, UX, and engineers to translate requirements into IoT platforms.
• Develop connected products, cloud services, and APIs.
• Participate in software architecture and design discussions for performance and maintainability.
• Create RESTful APIs, web services, and backend systems for Web and mobile interfaces.
• Troubleshoot and resolve issues across development, deployment, and support.
• Contribute to deployment, maintenance, and updates via CI/CD.
• Work in Agile teams with planning, estimation, code reviews, and iterations.
• Apply solid software engineering practices with source control, testing, CI, and documentation.

Skills

Java

AWS

REST APIs

CI/CD

Agile

Team collaboration

Problem solving

Education

Bachelor's degree in CS/Software Eng

Tools

Git

Docker

Job description

Here's something refreshing: A real person wrote this job posting and a real person will review your application. And whether we move forward or not, you'll hear back from us. We're all about embracing technology, but we believe there's no substitute for human insight, good judgement, and real connection. We find this especially true when it comes to building the kind of team we all want to be a part of. Now, about the opportunity...

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 Java Developer, you will be part of a multidisciplinary team of designers & engineers, working together under one roof to turn ideas into real, production-ready products.

As part of Helios Technologies, i3 develops products for a diverse range of customers and markets, including established OEM brands in outdoor recreation, off-road, health and wellness, and beyond.

About the Role

We're looking for a senior Java developer who enjoys creative problem-solving, building intuitive platforms, and working at the intersection of software, hardware, and user experience.

You'll contribute throughout the development lifecycle, from understanding product requirements and shaping platform features to designing, developing, testing, deploying, and supporting cloud solutions. Working closely with our software, firmware, and design teams, you'll help create the connected infrastructure that all of Helios will use to support its products.

You'll have opportunities to contribute ideas, influence technical decisions, and grow alongside an experienced engineering team that values individual expertise and collaboration.

What You'll Do

• Design, develop, test, and maintain cloud platforms written in Java and using AWS tools.
• Collaborate with product stakeholders, UX designers, and engineers to translate product requirements into intuitive, reliable IoT platforms.
• Develop connected products, cloud services, and APIs.
• Participate in software architecture and technical design discussions, considering application performance, usability, scalability, and long-term maintainability.
• Create RESTful APIs, web services, and backend systems that support Web and mobile interfaces.
• Troubleshoot and resolve software issues throughout development, deployment, and ongoing product support.
• Contribute to application deployment, maintenance, and updates through CI/CD pipelines
• Work within collaborative Agile development teams, contributing to planning, estimation, code reviews, and iterative development.
• Apply sound software engineering practices, including source control, automated testing, continuous integration, and documentation.

Education and Experience

• Bachelor's degree in Computer Science, Software Engineering, or a related technical discipline, or equivalent practical experience.
• Five+ years of professional development experience.
• Strong understanding of software development fundamentals and maintainable coding practices.
• Experience developing RESTful APIs.
• Professional experience with relevant cloud development languages or frameworks, such as Java, Python or TypeScript.
• Familiarity with cloud application development tools, debugging techniques, and testing practices.
• Experience using source control tools such as Git and working within Agile development teams.
• Strong analytical thinking, problem-solving, and technical communication skills.
• Ability to collaborate effectively, manage priorities, and balance technical details with broader product goals.

Nice to Have

• Cross-functional collaboration with UX/UI designers, firmware engineers, and other engineering disciplines
• Familiarity with cloud platforms, backend services, authentication, and data synchronization
• Automated testing, continuous integration, and deployment pipelines
• Contributions to software development standards, processes, and engineering best practices

Why i3

At i3, you'll be part of a team of people who genuinely enjoy solving problems together. We value curiosity, technical excellence, and an environment where people feel comfortable sharing ideas, asking questions, and learning from one another.

Being part of Helios Technologies gives us the opportunity to work on a broad range of products and technologies while keeping the collaborative, hands‑on culture that makes i3 special.

We offer a competitive benefits package, including a zero-deductible health plan, a generous 401(k) match, and an employee stock purchase program.

Benefits and Perks

• 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 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 annual salary
• Flexible Spending Account
• Health Savings Account
• Paid time off
• Paid holidays
• Emergency Assistance Fund
• Charitable Match Program

If you're looking for a place where you can keep learning, contribute meaningful work, and enjoy the people you work alongside, we could be a great fit for each other.