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FinTech · Full-Stack2020–2022

BuySellVouchers

Peer-to-peer voucher marketplace with integrated cryptocurrency support and automated escrow system.

Role

Full Stack Developer

Organization

BuySellVouchers

Challenge

Build a secure peer-to-peer marketplace supporting both fiat and cryptocurrency payments with automated escrow, fraud prevention, and a reputation system that scales to tens of thousands of users.

Approach

Designed a dual-payment system supporting fiat (Stripe) and cryptocurrency with automated multi-signature escrow wallets. Built a reputation system with fraud detection and optimized database queries for high-throughput operations.

Key Responsibilities

  • Designed dual-payment system (fiat and cryptocurrency)

  • Implemented automated escrow with multi-signature wallets

  • Built reputation system and fraud detection algorithms

  • Optimized database queries for high-throughput operations

  • Created comprehensive admin dashboard for operations

Results

  • 01

    50,000+ active users in 18 months

  • 02

    100,000+ voucher transactions processed

  • 03

    70% page load time reduction through optimization

  • 04

    4.8/5 user satisfaction rating

  • 05

    Zero security breaches throughout operation

Technology

ReactNode.jsMongoDBRedisStripeCryptocurrency APIsSocket.io