Development Engineer II – Steady-State 1D Modeling and Simulation

Daikin Applied; Plymouth (MN); Hybrid; USD 74,000 - 121,000; Full time

Job summary

Join Daikin Applied as a 1D Modeling and Simulation Engineer, where you'll develop tools for HVAC system simulations and work with advanced modeling technologies. This role includes designing libraries and frameworks while collaborating with a dynamic team to enhance performance and scalability within the HVAC domain. Bring your expertise in C# and thermodynamics to drive forward innovative engineering solutions!

Benefits

Medical/Dental/Vision coverage

401K match

Paid time off

Community involvement support

Life insurance options

Qualifications

• 5+ years of relevant experience or equivalent education.
• Familiarity with machine learning, data analytics, or AI-assisted modeling is preferred.
• Experience designing and implementing model libraries.

Responsibilities

• Design and implement libraries for steady-state system simulation.
• Develop and maintain C#-based software for model setup and integration.
• Support standardization of modeling practices and documentation.

Skills

C# programming

Thermodynamic systems understanding

Problem-solving

Analytical skills

Effective communication

Education

Bachelor’s degree in Mechanical Engineering, Software Engineering, or related field

Master’s degree or Ph.D. preferred

Tools

VapCyc

CoilDesigner

EES

Job description

Description

Make your mark at the world’s largest HVAC company

Daikin Applied is seeking a 1D Modeling and Simulation Engineer. The 1D Modeling and Simulation Engineer will focus on developing the tools, libraries, and infrastructure necessary to enable scalable and reusable steady-state system simulation capabilities across our engineering organization. Unlike traditional product design roles, this position is part of the central model-based engineering (MBE) team and is dedicated to building the internal simulation ecosystem that supports commercial HVAC development through robust model automation, calibration tools, and data-driven methods.

This role emphasizes C# software development, library creation, and integration with existing modeling platforms such as VapCyc, CoilDesigner, and custom simulation frameworks. The ideal candidate will bring strong programming skills, a deep understanding of HVAC thermodynamic systems, and a forward-thinking mindset regarding simulation automation and AI/ML integration. Come be a part of an exciting journey at Daikin Applied, where innovation and excellence drive our every endeavor!

Location : Plymouth, MN - Hybrid

What you will do:

• Design and implement libraries and development frameworks for steady-state system simulation with an emphasis on reusability, modularity, and integration
• Build tools that automate model generation, parameterization, calibration, and results processing for thermodynamic system simulations
• Develop and maintain C#-based software to enable user interfaces, model setup, and integration with third-party or in-house modeling platforms (e.g., VapCyc)
• Support the standardization of modeling practices, including documentation, file structure, and metadata tagging to enable model traceability and governance
• Work closely with internal stakeholders to define simulation requirements that enable multi-business-unit scalability (Chillers, Air Handlers, Terminal Systems)
• Collaborate with global MBE teams and modeling practitioners to ensure alignment and tool compatibility
• Assist in the development of test plans and support component and system testing to validate simulation models
• Champion model standardization, documentation, traceability, and lifecycle governance practices
• Investigate and apply machine learning (ML) and artificial intelligence (AI) tools to accelerate calibration, surrogate modeling, or automation of complex modeling workflows
• Provide guidance on best practices for simulation tool development, version control, and continuous integration

What’s in it for you:

• Medical/Dental/Vision coverage, PTO, 401K match, support for community involvement and much more
• The ability to make an impact and shape your career with a company that is passionate about growth
• The support of an organization that believes it is vital to include and engage diverse people, perspectives, and ideas to achieve our best

Minimum Qualifications:

• Bachelor’s degree in Mechanical Engineering, Software Engineering, or a related technical field
• 5+ years of relevant experience (or equivalent: M.S. with 2+ years; Ph.D. with direct tool development experience)
• Strong understanding of thermodynamic cycle modeling, HVAC systems, and steady-state heat transfer fundamentals
• Proficiency in C# programming, with demonstrated experience developing tools, libraries, or simulation software
• Familiarity with steady-state modeling platforms such as VapCyc, CoilDesigner, EES, or equivalent tools
• Effective communication skills, both verbal and written, with the ability to present technical concepts to non-technical audiences
• Strong problem-solving and analytical skills, with the ability to estimate work tasks and support project planning activities
• Experience designing and implementing model libraries, parameter databases, and calibration routines
• Demonstrated ability to work independently and collaboratively in a cross-functional and globally distributed environment
• Work visa sponsorship is not available for this position

Preferred Qualifications:

• Master’s degree or Ph.D. preferred
• Experience with machine learning, data analytics, or AI-assisted modeling and automation
• Familiarity with version control systems (e.g., Git) and software development best practices
• Exposure to API development, database interaction, or simulation-as-a-service frameworks
• Prior involvement in developing tools for multi-disciplinary or multi-physics modeling environments
• Understanding of model reuse, simulation governance, and lifecycle management concepts

Benefits:

Daikin Applied offers the following benefits for this position, subject to applicable eligibility requirements:

• Multiple medical insurance plan options + dental and vision insurance
• 401K retirement plan with employer contributions matching 100% of the first 3% of employee contributions and 50% on the next 2% of employee contributions
• Company provided life insurance + optional employee-paid voluntary life insurance, dependent life coverage, and voluntary accident coverage
• Short-term andlong-termdisability
• 3 weeks of paid time off for new employees + 11 company-paid holidays
• Vacationaccrueson a monthly basis, unless applicable federal,state,and local law requires a faster accrual
• Paid sick time in accordancewiththe federal,state,and local law
• Paid parental leave and tuition reimbursement after 6 months of continuous service

The typical annual base salary for this position ranges from $74,200-$120,700 in Minnesota. The range displayed represents the pay range for all positions in the job grade which this position falls. Individual base pay will depend on a wide range of factors including your skills, qualifications, experience, and location.

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