Junior Full-Stack Web Developer with backend focus. Primary responsibility Build and maintain the backend that connects the existing React frontend to the database, payment system, and business logic. Core technical skills Backend Node.js Express.js REST API development Database MongoDB CRUD operations schema design Frontend understanding React basics REST API integration JSON / HTTP requests Authentication JWT authentication session management password hashing (bcrypt) Payments Stripe API basics Stripe payment links Stripe webhooks Role management RBAC implementation role permissions (Super Admin / Client Admin / Guest) Basic SaaS knowledge multi-tenant applications subscription plans API security Dev tools Git GitHub / GitLab npm environment variables Postman / API testing Nice-to-have skills (not mandatory) Docker basic DevOps cloud deployment (AWS / Render / Vercel) email APIs (SendGrid / Resend) SMS APIs (Twilio) cron jobs / background workers Typical experience level 1–3 years experience in: Node.js MongoDB REST APIs