Jolinos Vartan N.

Computational physicist (MSc, Umeå University) who turns equations into working, verified code: simulations, numerical models, data analysis, and research-grade LaTeX. I've spent over 15 years writing scientific software, and I also taught at an engineering school, so I can explain the maths behind the code as well as write it. Clients come to me when the hard part is the physics or mathematics, not just the programming. What I do - Simulation and numerical modelling: Monte Carlo methods, ODE/PDE solvers, optimisation, curve fitting and parameter estimation, in MATLAB, Python, Fortran and C/C++ - Reproducing and extending research: implementing models from papers, validating them against published results, and finding why a simulation disagrees with the theory - Porting and modernising code: MATLAB ↔ Python, legacy Fortran or Pascal → modern Python or C++, Excel VBA → standalone or web applications, keeping the numbers identical - Debugging and speeding up scientific code: fixing wrong results, instabilities and slow loops; vectorising and restructuring large codebases - Statistics and data analysis: R and Python, from experimental data to clean, reproducible reports (R Markdown, Jupyter) - Signal processing: filtering, spectral analysis and localisation algorithms, including Java/Android work - LaTeX: complex equations, theses, books and custom templates. I've used LaTeX for more than 10 years and have typeset documents of several hundred pages How I work - I confirm the expected results with you before writing code, so we agree on what "correct" means - You get clean, commented code you can run yourself, plus a short note on how to use it and what was verified - I keep deadlines and tell you early if something in the problem turns out harder than expected - English (fluent) and French (native) If your project involves a model, an equation, or results that don't add up, send me a message. I'm happy to look at it and tell you honestly whether I'm the right person. I primarily work to satisfy my clients, take personal satisfaction in a job well done, and only then think about payment.