I need a developer (or small team) who can architect and code a finite-element analysis program entirely from scratch. The primary objective is structural analysis, and the solver must reliably handle: • linear and non-linear stress/strain problems • modal and transient dynamic cases • cumulative fatigue life evaluation I will supply benchmark problems and cross-check every result against trusted references, so numerical accuracy and sound formulation are essential. Implementation language is up to you—C++, Fortran, Python with Numba, or a mixed approach are all acceptable—as long as it is well-structured, documented, and easy to build on Windows and Linux. Deliverables 1. Source code with build scripts or CMake files 2. A concise user guide explaining input format, boundary conditions, and how to launch each analysis type 3. A short validation report showing your results for at least three classic test cases before I run my own suite Key expectations • Sparse matrix assembly and solver strategy that scales to ~250 k DOF on a modern desktop • Library of basic elements (beam, shell, hexa, tetra) with clear extension points for new formulations • Clean separation between solver core and I/O so I can bolt on my own pre/post tools later • Consistent unit handling and careful time-integration choices for dynamics and fatigue counting algorithms If you have written custom FEA modules or numerical libraries before, please mention them and link to any open-source examples you can share. I am ready to start as soon as I find someone who can demonstrate deep understanding of finite-element theory and practical code design.