mello is a YC-backed startup focused on wellbeing in remote and hybrid work environments. We are seeking a modern Full-Stack Engineer to craft front-end UI and integrate backend services, with a focus on scalability and security. The role is contract-based and part time, offering the chance to influence engineering culture while building cutting-edge features. You will work across React.js/Vue.js, OAuth integrations, and cloud deployments (AWS, Netlify, Firebase).