PHP

A growing collection of practical calculators for independent professionals in Israel, designed around yearly rules, four interface languages and privacy-friendly client-side calculations.

Orders and products moved while the old store remained active, using controlled delta imports, original order-number mapping and status reconciliation.

Systems that normalize form submissions, keep a local source of truth, transfer data to external tools and expose failures instead of showing false success.

Production repairs that remove fatal errors and modernize unsafe edges while preserving working business behavior.