Full-Stack Developer (Stripe & Crypto Wallet Integration)

Project Overview

We are building a rapidly growing sports betting subscription platform where users can follow professional betting experts and purchase premium subscriptions. The platform currently uses Stripe for subscription payments, and we are looking to expand our payment infrastructure by adding cryptocurrency wallet support.

We are seeking a highly experienced Senior Full-Stack Developer with proven expertise in payment systems, Stripe integrations, blockchain wallets, and scalable web applications.

Responsibilities

• Enhance and maintain the existing payment infrastructure.
• Extend the current Stripe-based subscription system.
• Design and implement crypto wallet connectivity and payments.
• Integrate popular wallets such as MetaMask, WalletConnect, Coinbase Wallet, and other EVM-compatible wallets.
• Develop secure payment flows for subscriptions, deposits, withdrawals, and transaction tracking.
• Build backend services for payment processing, reconciliation, and webhook handling.
• Ensure security, scalability, and reliability of all payment-related features.
• Collaborate on architecture decisions and provide technical guidance for future blockchain-related features.

Required Skills

• 5+ years of Full-Stack development experience.
• Strong experience with Stripe APIs, subscriptions, webhooks, and payment workflows.
• Experience integrating crypto wallets and Web3 authentication.
• Solid understanding of Ethereum and EVM-compatible networks.
• Strong proficiency in:
  • React / Next.js
  • Node.js / TypeScript
  • REST APIs
  • SQL databases
• Experience building secure financial or payment-related applications.
• Strong knowledge of application security and best practices.

Preferred Qualifications

• Experience with sports betting, fintech, trading, or subscription-based platforms.
• Smart contract development experience (Solidity).
• Experience with stablecoin payments (USDC, USDT).
• Familiarity with Stripe Connect and payout systems.
• Experience handling KYC, AML, or compliance-related workflows.

Project Stack

• Frontend: Next.js, React, TypeScript
• Backend: Node.js
• Database: MySQL
• Payments: Stripe
• New Integration: Crypto Wallet Payments (MetaMask, WalletConnect, Coinbase Wallet)

What We're Looking For

We're looking for a senior engineer who has successfully delivered production-grade payment systems and can independently lead the implementation of wallet-based payment functionality while maintaining a secure and seamless user experience.

Please include:

• Relevant Stripe projects you've built.
• Wallet integration experience.
• Links to live products or GitHub repositories (if available).
• Your proposed architecture for combining Stripe subscriptions with crypto wallet payments.

Engagement: Contract / Long-Term Opportunity
Experience Level: Senior
Industry: Sports Betting, Fintech, Web3 Payments