Senior Software Engineer – Tools Developer

XNRGY Climate Systems

. Develop the calculation engine for engineering models, numerical solutions, performance calculations, and product selection workflows .

Posted 10/9/2026full-timeMesa • Arizona • United StatesSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in developing and maintaining complex engineering software, with a strong focus on numerical methods, database management, and integration with engineering systems. Proficient in C#, VB.NET, and SQL, with experience in automating technical documentation and collaborating across technical teams.

Highest-signal resume keywords

C# ProgrammingVB.NET ProgrammingSQL Database ManagementNumerical MethodsGit Version Control

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Numerical SolutionsData ModelingPerformance CalculationsAutomated TestingSoftware ArchitectureProduct ConfigurationTechnical Document GenerationIntegration with ERP/CRMVersion ControlOptimization Techniques

Soft Skills

CollaborationProblem-SolvingCommunication

Tools & Technologies

PostgreSQLMySQLLaTeXCoolPropREFPROP

Industry Keywords

HVACRefrigerationIndustrial EquipmentEnergy SystemsASHRAE Standard 205

Tech Stack

Tools & technologies

ERPMySQLPostgresSQL.NET

About the role

Key responsibilities & impact

Develop the calculation engine for engineering models, numerical solutions, performance calculations, and product 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 user interfaces and workflows for Sales and Applications, including validation, errors, warnings, 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 engineering systems
Create scalable software architecture for bounded product configurations and modular product families
Establish testing, version control, release, deployment, and reproducibility practices for production-critical engineering software
Report to the Manager, CPQ Tools & Selection Software
Turn engineering models and product data into reliable commercial selections across chillers, CRAHs, and fan coil walls
Establish the Git-based development environment for the team

Requirements

What you’ll need

Bachelor’s degree in Computer Science, Software Engineering, Mechanical Engineering, or a related technical field, or equivalent demonstrated experience
7+ years developing and maintaining production engineering, scientific, numerical, industrial, or other technically complex software
Defensible fluency in C# and VB.NET
Practical experience with numerical methods including iterative calculations, convergence, interpolation, optimization, or other engineering and scientific computation
Strong SQL and relational database experience, including schema design, data modeling, migrations, indexing, and query optimization
Experience with PostgreSQL and MySQL is highly valued
Proficiency with Git, automated testing, code review, release management, and deployment
Experience translating engineering specifications into software and collaborating with mechanical, applications, testing, and other technical teams
Experience with product configuration, engineering selection software, or software supporting complex engineered products
Experience integrating software with test-data pipelines, ERP, CRM, PLM/PDM, or technical document generation systems
Experience with HVAC, refrigeration, industrial equipment, manufacturing, energy systems, or other engineered products is strongly preferred
Experience with automated technical document generation, including LaTeX, templated PDF pipelines, or equivalent
Familiarity with refrigerant property libraries such as CoolProp or REFPROP
Exposure to ASHRAE Standard 205 / SSPC 205 data exchange formats
Legally authorized to work in the United States of America
Must indicate whether visa sponsorship is required now or in the future

Benefits

Comp & perks

Opportunity to be part of a fast-growing organization transforming the climate systems industry through sustainability, innovation, and advanced manufacturing
Opportunity to collaborate with talented cross-functional teams
Equal employment opportunities
Voluntary self-identification and confidential handling of demographic information
No adverse treatment for declining voluntary equal employment opportunity information