Finalize MVP Features for AI-Powered Luxury Resale Marketplace

I am seeking experienced developers to help finalize key features for Trendies, an AI-powered, invite-only luxury resale marketplace. The web MVP is built using Next.js (React + TS) on the frontend and Nest.js + Prisma + PostgreSQL on the backend.
Key tasks include:
- Completing buyer and seller checkout and order flow.
- Implementing real-time notifications and email triggers (DB events → Brevo).
- Enhancing product lifecycle edges and admin interface features.
- Addressing small UI fixes for consistency and responsiveness.

Collaboration Format:
- Part-time or milestone-based engagement starting with a short paid trial task.
- GitHub repo with PR-driven workflow and clear acceptance criteria.
- Simple NDA required before repo access.

Ideal Skills and Experience:
- Proficiency in Next.js, Nest.js, Prisma, WebSockets, and email providers.
- Experience in shipping similar projects.
- Strong GitHub or code samples showcasing relevant work.

Budget and Timing:
- Target hourly rate: €15–20 per developer (negotiable).
- Open to small equity shares instead of fixed-price micro milestones.
- Launch target: 31 October 2025.