Full-Stack Developer Needed for Code & UX Review – SaaS / POS App

Full-Stack Developer Needed for Code & UX Review – SaaS / POS App I’m looking for a full-stack developer to review an existing SaaS/POS application and give me an outside perspective on the project. The application is already built and functional. I’m not looking for a rebuild or a huge formal audit. I mainly want someone to explore the app, review the codebase, test the actual product, and identify the most important things that could be improved. STACK * JavaScript / HTML / CSS * Supabase / PostgreSQL * Capacitor * iOS / Swift integrations * Vercel * GitHub WHAT I’D LIKE REVIEWED * Bugs or fragile parts of the code * Code that is overly complicated or duplicated * Performance issues * Possible loops, race conditions, or unnecessary event listeners * Supabase / database implementation * Authentication and tenant logic * Capacitor / iOS implementation * General code organization * UX/UI inconsistencies * Navigation and usability * Tablet and mobile behaviour * Anything that could cause recurring bugs or maintenance problems I’m especially interested in finding situations where we may be fixing symptoms instead of the actual underlying problem. WHAT I NEED FROM YOU You do not need to review every single line of code. I’d like you to: * Test the application * Browse through the GitHub repository * Identify the main problems you notice * Give me your top 5–10 recommended improvements * Tell me what should be fixed first * Point to specific files/functions when relevant A simple document or structured list is enough. I don’t need a long formal report. BUDGET $100 CAD fixed price for the initial review. The idea is to spend a few hours reviewing the project and identifying the highest-priority issues. If the review is useful, there may be additional paid work afterward to help implement some of the fixes. WHEN APPLYING Please briefly tell me: * Your experience with JavaScript * Your experience with Supabase, if any * Whether you have worked with Capacitor or mobile web apps * An example of a bug or architectural issue you found while reviewing an existing project You do not need to be a senior developer. I’m mainly looking for someone who is comfortable understanding an existing codebase, testing things properly, and giving practical feedback. Please start your proposal with “R360” so I know you read the description.