I build single-page and eCommerce applications using MERN Stack (MongoDB, React.js, Express.js, Node.js) for the past 2 years ranging from simple landing pages to complex eCommerce applications. My other tech stack includes PHP, Java, Python (although I had left those a while back). So, If you want to build single-page applications using React.js and using REST API, I can assure the work readiness and correctness to be perfect