I love write code in Node.js in the backend, and sometimes work with Python (Django, Flask). For frontend React.js and Vue.js rocks, but also can work with Angular.
For native apps I use React Native, is pretty awesome. Also I know Java for build Android apps.
For SQL databases MySQL is my choose. For NoSQL databases I work with MongoDB, RethinkDB and Redis.
If you have a project that you want to get started, think you need my help with something or just fancy saying hey, then get in touch.