Confidential · Crypto PayFeatured

Stablecoin Payment Gateway

A confidential non-custodial multi-chain payment gateway that settles stablecoins directly into merchant wallets (name withheld).

PersonalContribution 100%

★Key Metric: Stablecoin payments across multiple chains through a single gateway, targeting Stripe-level DX.

Engineering Role

BackendFullstack

#Web #Backend #Product #Personal #TypeScript 5.6 #Node.js 22 #Fastify #PostgreSQL #OpenAPI 3.1 #Zod

Confidential · Crypto Pay

Stablecoin Payment Gateway

SYS

#Web#Backend#Product#Personal

Overview

A non-custodial, multi-chain (EVM, Solana, Tron) payment PG that settles USDC, USDT, and PYUSD straight into merchant wallets (name withheld). Designed for Stripe-grade DX — REST API, React Drop-in, and Webhook SDK.

My Work

▸pnpm monorepo plus Fastify Stripe-style API
▸OpenAPI 3.1 → TS auto-generation plus event-sourcing schema
▸Server/React SDK plus multi-chain transaction indexer

Features

Server SDK — one-line invoice creation
React Drop-in / Hosted checkout
Webhook verification SDK
Stripe-style REST API

Highlights

Non-custodial — funds settle directly into merchant wallets
Multi-chain (EVM, Solana, Tron) plus many major stablecoins
OpenAPI 3.1 → TS auto-generation plus Postgres event sourcing

Timeline

Role: Client-confidential build, role/domain partly masked

Contribution: 100%

Collaboration: Personal

Tech Stack

</>Fastify, Postgres event sourcing, multi-chain, OpenAPI 3.1, monorepo

TypeScript 5.6Node.js 22FastifyPostgreSQLOpenAPI 3.1Zodpnpm workspaceReact (Drop-in)