Full-Stack Dev to Fix Bugs, Harden Security & Ship Core Flows on SaaS Portal

Hi there — I’m Jake, founder of BANGER EDITS (bangeredits.com), an on-demand video editing portal for creators, brands, and agencies. The MVP portal has already been built (on Lovable.dev / React + Supabase stack). It’s live but has bugs, missing security hardening, and a few core flows that need finishing before I open it up to paying customers. I need a full-stack developer who can: 1. QA the existing build — walk through every user flow, log bugs, fix them 2. Harden security — proper auth, RBAC, rate limiting, secrets management 3. Wire up transactional emails — signup, brief submitted, banger delivered 4. Verify the briefing flow — customer submits brief → editor receives it cleanly 5. Ship the timeline feedback feature — pin comments on video timeline (already partially built, needs finishing) 6. Build me a proper master admin account — see all users, all projects, all payments, all messages