1 - Beginner
2 - Intermediate
3 - Advanced
4 - Wizard
Front-end Dev (HTML, CSS, JS, React, etc)
Back-end Dev (NodeJS, Python Flask, etc.)
User Research (Interviewing, Surveying, Focus Groups, Ethnography, etc)
UI Design (Figma, Adobe XS, Sketch, etc)
Data Science (Python, R, NLP, etc)
Literature review (i.e., reading and summarizing academic papers)