full stack development nextjs development company freelancer for responsive landing pages fullstack dev freelancer for multi-tenant saas apps web design freelancer for pixel perfect development web design company freelancer for biometric time tracking zustand react state library web development firm react development vue.js development freelancer for netlify functions setup https://jungle-princess-pinball-m13023.nizarblog.com/36594034/new-step-by-step-map-for-software-developer-vs-web-developer