Software Engineer - HVAC Systems

XETEX LLC•Holmen, WI

About The Position

About XeteX At XeteX, our mission, vision, and values drive our company purpose: “Helping Buildings Breathe Better.” By designing and manufacturing high-performing energy recovery ventilation and air handling solutions for industrial and commercial buildings, XeteX produces a better world for all of us. XeteX was founded in 1984. In recent years, our Company has experienced unprecedented growth and has been recognized as an eight-time Inc. 5000 Honoree ranking as one of the fastest-growing private companies in America. Our headquarters are located in Coon Rapids, MN and our production facilities are based in Holmen, WI. Xetex is teaming with innovation, expertise, and outstanding people. That is why we value our people as our greatest asset! Our employees lead through integrity, apply creativity and talent, invent innovative solutions to meet new demands, and offer effective services/products to be leaders in the industry. By adding your creativity, innovations, and contributions, you take pride in being a valued member of our growth and success. Software Engineer – HVAC Systems The Software Engineer has a strong mechanical aptitude and HVAC knowledge to support the development and enhancement of engineering selection and performance software tools. This role bridges software development and mechanical engineering by translating HVAC concepts such as airflow, heat transfer, psychrometrics, and system performance into accurate, scalable, and user-friendly applications. The ideal candidate will collaborate closely with engineering, product management, and application teams to develop tools that support equipment selection, product configuration, and system design.

Requirements

Bachelor of Science in Computer Science, Software Engineering, Mechanical Engineering, or related technical field required
Approximately 5 years of software development experience
Strong mechanical aptitude and interest in HVAC systems required
Experience with: C#, .NET Framework / .NET Core, HTML, JavaScript
Understanding of HVAC systems, thermodynamics, airflow, or related mechanical principles preferred
Strong analytical, troubleshooting, and problem-solving skills
Ability to work cross-functionally with engineering and technical teams
Excellent communication and organizational skills

Nice To Haves

Experience developing web-based or cloud-hosted engineering applications
Familiarity with data visualization tools for fan curves, psychrometric charts, or performance plotting
Experience integrating with BIM platforms such as Revit
Knowledge of API development and external system integrations

Responsibilities

Translate mechanical engineering concepts including thermodynamics, heat transfer, fluid dynamics, and airflow into executable software logic
Collaborate with internal engineering teams and external software contractors to develop, revise, test, and maintain performance and sales selection tools
Write clean, modular, and maintainable code following software development best practices and lifecycle standards
Participate in system testing, debugging, validation, and software performance optimization
Maintain version control and contribute to software documentation and process improvements
Convert HVAC engineering principles such as psychrometrics, static pressure, fan performance, and coil calculations into reliable software calculations
Interpret engineering specifications, submittments, and product performance data to support application development
Validate engineering calculations related to: Handling Unit (AHU) selection, Coil performance, Fan curves and system pressure
Support software updates related to new product lines, engineering changes, and feature enhancements
Work closely with Mechanical Engineers, Product Managers, and Sales and Application Engineers
Gather and refine software requirements for new tools and feature enhancements
Participate in product development discussions and design reviews
Provide technical support and user training for engineering selection software
Develop and execute unit tests and validation routines for engineering calculations
Cross-check software outputs against manual engineering calculations and performance data
Support quality assurance efforts and ensure compliance with internal standards
Identify opportunities to automate manual engineering workflows and improve usability
Enhance software scalability, performance, and maintainability
Stay current with emerging software frameworks, technologies, and development best practices
Contribute to technical documentation, knowledge sharing, and continuous improvement initiatives