A Bitcoin/ Etherum company is looking for a full-stack web developer

Requirements:
At least 3-4 years of experience in software engineering.
Fluent in back-end technologies (Ruby/NodeJS/Python/PHP/Java).
Experienced in front-end (HTML/CSS/JS),
Familiar with JS frameworks such as Angular and React.
At least 3 years of experience with SQL databases (such as PostgresSQL, MongoDB, MySQL, etc.)
Ruby on Rails experience - great advantage.

Nice to Haves:
Familiar with security and cryptography.
Familiar with Bitcoin technology