Thiago Bertoletti

Thiago is the founder and lead engineer of QuickUse Calculator. He built the site after years of frustration with calculators that get the math right but the context wrong — splitting Brazilian labor law from US payroll math from generic finance with no overlap or comparability.

His background is in software engineering, with hands-on experience working between the Brazilian and US financial systems as an immigrant founder. That dual context shapes the editorial direction of the site: bilingual from day one, source-cited tables for every regulatory input, and decimal-precision math (never floating point) for every financial calculation.

Thiago personally writes or reviews every calculator on the site. The methodology page documents the validation process: official source links, yearly review cycles, and named reviewers credentialed in the relevant domain. When a calculator touches a topic outside his direct expertise — clinical pregnancy tracking, US-state-specific payroll deductions, Brazilian municipal property tax — the calculator is built against primary sources and validated against the calculator that the issuing body publishes (when available).

He is not a CPA, contador, or financial advisor. The site is a research and reference tool, not professional advice. For decisions involving material money or material risk, consult a credentialed professional. The "When NOT to use this calculator" section on every page is there for a reason.