Javascript Backend Developer Jobs in Wisconsin (NOW HIRING)

Build your best future with the Johnson Controls team!

Who we are:

Johnson Controls is global leader in smart, healthy, and sustainable buildings. Our mission is to reimagine the performance of buildings to serve people, places, and the planet. Join a winning team that enables you to build your best future! Our teams are uniquely positioned to support a multitude of industries across the globe. You will have the opportunity to develop yourself through meaningful work projects and learning opportunities. We strive to provide our employees with an experience focused on supporting their physical, financial, and emotional wellbeing. Become a member of the Johnson Controls family and thrive in an empowering company culture where your voice and ideas will be heard - your next great opportunity is just a few clicks away!

What We Offer:

• Competitive salary

• Paid vacation/holidays/sick time

• Comprehensive benefits package including 401K, medical, dental, and vision care.

• On-the-job/cross-training opportunities

• Encouraging and collaborative team environment

• Dedication to safety through our Zero Harm policy

**To be considered for this role, candidates must be a U.S. Citizen or a U.S. Permanent Resident (Green Card holder).

What youwill do

Johnson Controls is building the next generation of intelligent building systems for the world's most demanding environments, hyperscale data centers.We'relooking for a technically versatile engineer who loves both crafting intuitive user interfaces and engineering the backend systems that power them.

This role sits inside our Data Center Controls Innovation Engineering team at our Controls Product Development Center in Glendale, WI.You'llbe embedded in a collaborative lab and software environment working alongside experienced engineers on middleware platforms, web applications, and building automation systems deployed in critical infrastructure globally. Ifyou'resomeone who cares about both how a system works under the hood and how a user experiences it on screen, this is the role for you.

This position is 100% on-site at our new Controls Product Development Center and Lab in Glendale, WI, whereyou'llcollaborate closely with cross-disciplinary teams and work hands-on with real products. The role may include up to 20% travel.

Howyou willdo it

• Designing and building full stack features across the entire application layer: RESTful APIs, middleware services, and responsive web UIs

• Writing clean, maintainable code in modern JavaScript/TypeScript (React, Node.js) and Python for backend services and data pipelines

• Developing andmaintainingmiddleware integrations between building automation systems, IoT field devices, and cloud platforms

• Building dashboards and data visualization tools that surface real-time and historical data center telemetry to operators and engineers

• Collaborating with embedded and controls engineers to define APIs and data contracts between device firmware and software layers

• Participating in code reviews, writing unit and integration tests, and supporting CI/CD pipelines

• Tracking development tasks and workflows in JIRA, keeping features visible and shipping on schedule

• Building and presenting technical designs, sprint demos, and status updates for engineering and project stakeholders

• Collaborating with cross-functional and global engineering teams to hit project milestones

What we look for

Required Qualifications

• Bachelor's degree in Computer Science, Software Engineering, Computer Engineering, or a related field

• 0 to 5 years of professional or internship experience; new graduates are welcome

• Proficiencyin JavaScript or TypeScript with hands-on experience in a modern frontend framework (React preferred)

• Experience building and consuming RESTful APIs and working with backend frameworks (Node.js, Python/Flask, or similar)

• Solid understanding of web fundamentals: HTML, CSS, HTTP, and browser rendering

• Familiarity with relational or time-series databases and writing queries (SQL,InfluxDB, or similar)

• Basic experience with containerization and deployment tooling (Docker, CI/CD pipelines)

• Comfortable working in a Linux/Unix environment and using Git for version control

• Strong problem-solving instincts; you dig into issues and follow threads across the stack rather than waiting for someone else to solve them

• Organized and clear communicator; you can write a concise technical summary and present it to a room

• Proficient with standard engineering and project tools: JIRA, Confluence, or equivalent

• Mustbe authorized towork in the U.S.; no sponsorship available

• Must be able to work 100% on-site in Glendale, WI; up to 20% travel

Preferred Qualifications

• Exposure to MQTT,WebSockets, or other real-time data protocols used in IoT or industrial systems

• Experience with embedded systems

• Familiarity with C/C++ and/or Rust

• Familiarity with data center infrastructure, HVAC systems, or Building Automation Systems (BAS)

• Experience integrating with third-party hardware APIs or industrial protocols (BACnet, Modbus, OPC-UA)

• Exposure to cloud platforms (AWS, Azure, or GCP) and serverless or microservices architectures

• Experience working with cross-functional or globally distributed engineering teams

• An eye for the business context behind engineering decisions

SALARY RANGE: $93,000 - $140,000 (Salary to be determined by the education, experience, knowledge, skills, and abilities of the applicant, internal equity, and alignment with market data.) This role offers a competitive Bonus plan that will take into account individual, group, and corporate performance. This position includes a competitive benefits package. The posted salary range reflects the target compensation for this role. However, we recognize that exceptional candidates may bring unique skills and experiences that exceed the typical profile. If you believe your background warrants consideration beyond the stated range, we encourage you to apply. To support an efficient and fair hiring process, we may use technology assisted tools, including artificial intelligence (AI), to help identify and evaluate candidates. All hiring decisions are ultimately made by human reviewers. For details, please visit the About Us tab on the Johnson Controls Careers site at https://jobs.johnsoncontrols.com/about-us