Ruby on Rails Developer / Full Stack Developer – Security Audit & Heroku Memory Optimization

looking for an experienced Ruby on Rails / Full Stack Developer to improve the security and performance of an existing SaaS web application hosted on Heroku. The main tasks are to conduct a security audit, close critical and high-severity security issues, optimize Heroku memory usage, and improve application key and secret management. Responsibilities: Conduct a Security Audit of the Ruby on Rails application. Identify and fix critical and high-priority security vulnerabilities. Review application keys, API keys, credentials, and secrets management. Fix OWASP Top 10 issues (SQL injection, XSS, CSRF, etc.). Improve authentication, authorization, and API security. Perform Heroku Memory Optimization and investigate memory leaks. Review PostgreSQL queries and application performance. Debug existing code and add/update RSpec tests. Requirements: Strong Ruby on Rails / Ruby experience. Hands-on experience with Heroku optimization and deployment. Knowledge of PostgreSQL, RSpec, JavaScript, and Git. Experience with SaaS security audits and vulnerability remediation. Understanding of application key management and secure coding practices. Full Stack Web Development experience. React, Vue.js, Node.js, HTML, CSS, Laravel, PHP, and Python are a plus. To apply: Please share relevant experience with Ruby on Rails security audits, Heroku memory optimization, and fixing high-severity security issues, along with examples of similar projects and your availability.