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tash.cards
Solo Engineer
Institutional-grade trading card exchange with Supabase Realtime price feeds, Stripe Connect KYC settlement, and an AI intake pipeline using Gemini Vision and PSA's API to onboard graded cards instantly.
250+Listed Cards
Overview
tash.cards is a trading card marketplace built for collectors who want institutional-grade liquidity without the friction of legacy platforms. Users list graded cards, get instant AI-assisted intake, and settle trades through compliant payment rails.
I built the full stack solo — real-time pricing and order matching, KYC onboarding, seller payouts via Stripe Connect, and a Gemini Vision pipeline integrated with PSA's API that reads slab labels and populates listings in seconds.
Highlights
- 250+ cards listed with Stripe Connect settlement for seller payouts
- Built Supabase Realtime infrastructure for live price feeds and order book updates
- Engineered AI intake with Gemini Vision + PSA API for graded card onboarding
- Designed fraud-resistant listing flows for high-value collectible inventory
Stack
Next.jsSupabaseStripeGeminiPSA API