Model & Applications Developer

Salary Range:

$87,400.00 - $

Job Title: Model & Applications Developer

Location: Lake Forest, CA / Houston, TX

Employment Type: Full-time

The Model & Applications team is responsible for developing and maintaining the first-principles mathematical models at the core of AVEVA Process Simulation. Using an equation‑oriented solver architecture, we deliver rigorous equipment models that serve customers across refining, chemicals, renewables, and beyond. As part of this team, you will work at the intersection of chemical engineering, applied mathematics, and software development contributing to models that run in steady‑state, dynamic, flow‑driven, and pressure‑driven simulation modes.

• Develop, maintain, and improve first‑principles mathematical models for simulating chemical process equipment in both steady‑state and dynamic modes
• Implement model equations within a collaborative environment using standard Agile software development practices including version control, pull requests, and automated testing
• Diagnose and resolve complex simulation issues escalated from technical support, applying subject matter expertise to identify root causes
• Collaborate within multidisciplinary squads alongside software developers, thermodynamicists, and solver/optimization engineers to deliver new simulation capabilities

• B.S., M.S., or Ph.D. in Chemical Engineering (or equivalent demonstrated experience in process modeling)
• Ability to derive and formulate systems of equations from first principles (mass, energy, and momentum balances)
• Strong foundation in transport phenomena and thermodynamics
• Familiarity with equation‑oriented or simultaneous‑equation solving approaches

• Experience with process simulation platforms (AVEVA, Aspen, etc.) and understanding solver convergence behavior
• Programming (Python, C++, C#, or similar) with experience working in a shared codebase using version control (e.g., Git)
• Breadth across multiple process domains (separations, reaction systems, heat exchange, pressure networks) with the ability to develop expertise in unfamiliar areas
• Ability to communicate complex mathematical and engineering concepts clearly to cross‑functional stakeholders including developers, product managers, and customers
• A record of initiative and independent problem‑solving: research contributions, open‑source development, or self‑directed technical projects

USA benefits include: flex work hours, 20 days PTO rising to 25 with service, three paid volunteering days, primary and secondary parental leave, well‑being support, medical, dental, vision, and 401(k).

Hybrid working:
Most roles are based at a local office with an expectation of being on‑site 50% of the time. Some positions are fully office‑based, and certain roles that support specific customers or markets may be remote. The working arrangement for this position will be confirmed during the hiring process.

AVEVA requires all successful applicants to undergo and pass a drug screening and comprehensive background check before they start employment. Background checks will be conducted in accordance with local laws and may, subject to those laws, include proof of educational attainment, employment history verification, proof of work authorization, criminal records, identity verification, credit check. Certain positions dealing with sensitive and/or third‑party personal data may involve additional background check criteria.

AVEVA is an Equal Opportunity Employer. We are committed to being an exemplary employer with an inclusive culture, developing a workplace environment where all our employees are treated with dignity and respect. We value diversity and the expertise that people from different backgrounds bring to our business. AVEVA provides reasonable accommodation to applicants with disabilities where appropriate. If you need reasonable accommodation for any part of the application and hiring process, please notify your recruiter.

Determinations on requests for reasonable accommodation will be made on a case‑by‑case basis.