Full-Stack Developer (Web3/DeFi)

FillX is building a next-generation hybrid DEX combining CEX-speed trading with DEX-level security. This Full-Stack Developer role focuses on building the trading platform, backend APIs, and blockchain integrations powered by Orderly Network.

• Build and maintain trading platform frontend with React and Next.js
• Develop backend APIs for AI signal system, social features, and trading
• Integrate with Orderly Network SDK for on-chain trading
• Implement WebSocket connections for real-time market data
• Build user authentication, account management, and KYC flows
• Optimize performance for low-latency trading experience

• 3+ years of full-stack development experience
• Strong proficiency in React/Next.js + Node.js (or Python)
• Experience with WebSocket, real-time data, and REST APIs
• Database experience (PostgreSQL/MongoDB/Redis)
• Familiarity with blockchain/Web3 concepts
• Good English communication skills
• Nice to Have: DeFi/DEX experience, TradingView integration, AI/ML APIs, TypeScript, Docker/Kubernetes

• Salary: $2,500-$4,000/month
• 100% Remote - work from anywhere
• Flexible hours - async-first team
• Token allocation - early team equity
• Direct access to founders