Bibliographic References Manager - 2

Hey There! My name is Iván, I'm working part time as CTO for a Spanish Startup (almasanta dot com). I'm looking for one client to work in my spare time, as I like to have only one-client at the same time in order to give a good support and product quality. Experience-wise, I'm a full stack developer (more than 7 professional experience years, and even more as a hobby), have worked in many different languages (PHP, C#, Ruby, Python, Javascript, CSS/HTML, SQL, ...), and I like robust and clean code and to discover and use the latest technology stack: AWS, Docker, SOLID Principles, 12 factor, etc... Btw... I also like to use TDD and/or BDD when the project requires it, because i think tests have to be short, meaningful and they should secure main business logic. Creative, resolutive and team player.