Node.js Authentication Expert Needed to Fix Login/Auth Issues

Description: We are looking for an experienced Node.js developer to diagnose and fix authentication issues in our application. Requirements: Strong experience with Node.js and Express.js Experience with JWT, OAuth, Passport.js, session-based authentication, or similar auth systems Ability to debug login, token validation, authorization, and user session issues Experience with MongoDB, PostgreSQL, or similar databases Familiarity with security best practices Tasks: Investigate existing authentication flow Identify the root cause of login/authentication failures Fix bugs and ensure stable authentication Test and verify the complete login/logout/token refresh process Provide a brief summary of changes made Please include in your proposal: Relevant Node.js authentication projects you have worked on Your experience with JWT/OAuth/Passport.js Estimated time required to troubleshoot and fix the issue Looking for someone who can start immediately.