## Company Overview ONSQUARE INC is a Korea-based Fintech and AI-based SaaS startup. It develops payment infrastructure and AI Agent-based user tools for the global market, operating with a distributed team structure across Korea, Canada, and Vietnam. ## Responsibilities - Develop Fintech and AI Agent services - Develop in-house SaaS products - B2B workflow management tools (Immigration automation) - Fintech payment platform (Remittance, Payment, KYC) - AI Agent-based user tools - Front-end: React and TypeScript-based web applications - Back-end: API servers based on Node.js and NestJS - Data modeling and caching using PostgreSQL and Redis - GitHub-based code reviews and PR collaboration - Deployment and operation in AWS environments ## Requirements - 5+ years of Full-stack web development experience - Experience in React and TypeScript frontend development - Experience in Node.js, NestJS backend frameworks - Experience in PostgreSQL data modeling and query optimization - Experience in fintech, B2B SaaS, or AI products preferred - Experience integrating payment systems (Stripe, Airwallex) - Proficient in English conversation