Senior Software Engineer, CPQ & Selection Engine

XNRGY Climate Systems, Inc.; Mesa (AZ); On-site; USD 140,000 - 190,000; Full time

Job summary

XNRGY Climate Systems, Inc. in Mesa, AZ seeks a Senior Software Engineer for the Selection Engine & CPQ to turn engineering models and product data into reliable commercial selections across chillers and data center cooling technologies.

You’ll own the software connecting models to downstream users, establish the Git-based development environment, and collaborate with mechanical, applications, and testing teams to deliver robust solutions.

Qualifications

• 7+ years developing and maintaining production engineering, scientific, numerical, or other technically complex software.
• Fluent in C# and VB.NET, with the ability to build, extend, and modernize calculation codebases.
• Experience with relational databases, data modeling, migrations, and query optimization.

Responsibilities

• Develop the calculation engine for engineering models, numerical solutions, performance calculations, and selection workflows.
• Implement configuration, rules, constraints, pricing, and selection logic across complex product configurations.
• Design and maintain performance databases, data models, versioning, validation, and traceability.
• Integrate test-stand data and tools for performance correlation, data validation, and model deployment.
• Shape the user interface and workflows used by Sales and Applications, including validation and quote recall.
• Automate performance reports, submittals, equipment schedules, drawings, and other technical packages.
• Connect selection software with CRM, ERP, PLM/PDM, pricing, BOM, and related systems.
• Create scalable software architecture supporting bounded configurations and modular product families.
• Establish testing, version control, release, deployment, and reproducibility practices for production software.

Skills

C# / VB.NET

Numerical methods

SQL databases

Git & testing

Engineering software

Education

Bachelor’s degree in CS/Software Eng or related field

Tools

LaTeX

PostgreSQL

MySQL

ERP/CRM/PLM systems

Job description

XNRGY Climate Systems, Inc. in Mesa, AZ seeks a Senior Software Engineer for the Selection Engine & CPQ to turn engineering models and product data into reliable commercial selections across chillers and data center cooling technologies.

You’ll own the software connecting models to downstream users, establish the Git-based development environment, and collaborate with mechanical, applications, and testing teams to deliver robust solutions.