Lead Software Engineer (C++)

Location: Shanghai, China

Company

hirify.global develops simulation products and finite-element software for advanced packages, 3D-IC stacks, and PCBs.

What you will do

• Derive, implement, and verify finite-element formulations in production C++.
• Develop unit and regression tests using analytical solutions and benchmark problems.
• Profile and optimize solver and meshing code for runtime and memory performance on large models.
• Debug non-convergence, mesh quality, ill-conditioning, and accuracy issues in customer cases.
• Document formulations, assumptions, and validation results for reproducibility.
• Collaborate with application engineering, QA, and product management to deliver features.

Requirements

• PhD in Mechanical, Civil, Aerospace Engineering, Computational Mechanics, Applied Mathematics, or a related field; alternatively, an MS with 2+ years of relevant industry or research experience.
• Strong knowledge of continuum mechanics and the finite element method, including weak forms, isoparametric elements, numerical integration, assembly, and Newton–Raphson methods.
• Working knowledge of heat transfer or thermomechanical stress analysis, including thermal eigenstrain, CTE mismatch, and layered structures.
• Strong C++11 or later skills, including pointers, memory ownership, templates, debugging, and extending large codebases.
• Familiarity with sparse linear algebra and at least one sparse solver or library.
• Clear written and spoken English and willingness to collaborate through technical review and knowledge sharing.

Nice to have

• Development experience with a commercial or open-source FEA code such as Abaqus, ANSYS, LS-DYNA, COMSOL, Code_Aster, FEniCS, deal.II, or MOOSE.
• Experience with nonlinear FEA, parallel programming, sparse solvers, graph partitioning, mesh generation, or computational geometry.
• Background in semiconductor packaging or PCB engineering, including 3D-IC, HBM stacks, solder reliability, or warpage.
• Experience developing on Windows and Linux with Git or Perforce.

Culture & Benefits

• Hands-on R&D work with direct ownership of features from formulation through validation and performance optimization.
• Collaboration with simulation developers, application engineers, QA, and product management.
• Work on production software used to analyze industrial geometries and large-scale simulation models.