Sr. Staff Thermal Engineer (Semiconductor Packaging)

Location: Boston, MA or Mountain View, CA, United States; flexible hybrid workplace model

Salary: $166,000–$262,000 USD per year, plus equity and other rewards

Company

hirify.global develops photonics-based infrastructure for AI and high-performance computing data centers, including 3D-stacked photonics engines and advanced package technologies.

What you will do

• Perform thermal simulations to influence package and system design.
• Develop and validate thermal models covering heat transfer, airflow, and thermal interactions in complex electronic assemblies.
• Design and optimize thermal management solutions including heat sinks, thermal interface materials, heat pipes, vapor chambers, and liquid or air cooling systems.
• Drive thermal characterization and validation through lab-scale prototypes and experiments with vendors.
• Develop analytical, semi-empirical, and CFD tools, templates, best practices, and automation scripts in Python or MATLAB.
• Communicate findings to internal stakeholders, suppliers, and customers, and document methodologies in technical reports.

Requirements

• M.S. or Ph.D. in Mechanical Engineering, Materials Science, Chemical Engineering, or a related engineering field.
• At least 5 years of experience in package or system thermal analysis.
• Deep knowledge of thermal conduction and convective heat transfer.
• Experience designing, modeling, testing, sourcing, and deploying advanced thermal management technologies.
• Experience with steady-state and transient thermal analysis using ANSYS Icepak, ANSYS Fluent, and/or Flotherm.
• Experience setting up and interpreting CFD simulations for complex geometries and boundary conditions, plus working knowledge of lab-scale validation techniques.

Nice to have

• Knowledge of fluid dynamics and assembly process modeling for 2D/3D packaging technologies.
• Experience with two-phase immersion cooling and single- or two-phase liquid flow.
• Knowledge of thermal technologies for high-performance computing and data centers.
• Experience developing thermal control algorithms and using DOE or JMP for statistical analysis.
• Excellent communication skills and experience working in cross-functional teams.

Culture & Benefits

• Medical, dental, and vision coverage.
• Retirement savings matching program.
• Life insurance, short- and long-term disability coverage, and paid family leave.
• Vacation, sick leave, and public holidays.
• Training and development, commuter benefits, and equity grants for full-time employees.