Codebase Audit and Architecture Review

Hi, I'm looking for a senior engineer to perform a comprehensive technical audit of an existing SaaS platform before production launch. This is not a development task. The goal is to review the codebase,... (Budget: $250 - $750 USD, Jobs: Architecture, Database Management, JavaScript, Mathematics, React.js, Software Architecture, Software Development, Technical Documentation, Test Automation, Testing / QA)