Building an online shopping website like Lazada SG involves creating a platform with a seamless shopping experience, extensive product catalogs, secure payment gateways, and efficient order management systems. Essential features include user accounts, product search and filters, reviews, and responsive design for mobile compatibility. Integration with logistics partners for real-time tracking and a robust backend to handle high traffic are also key. The development process requires a clear understanding of the target market, technology stack, and compliance with local regulations. Costs vary based on design complexity and features but can range from $10,000 to $80,000.