QA Tester for Realtime Multi-User Social App (Next.js + Supabase)

I'm a solo founder building a social web app with a strong collaborative/multi-user core. It's at private alpha — fully built (~85% of pre-launch scope), running on a staging environment, and I've been the only tester so far... (Budget: $8 - $15 USD, Jobs: JavaScript, Mobile App Development, Next.js, Regression Testing, Software Testing, Supabase, Test Automation, Testing / QA, Web Development)