Javier A.

I create professional applications on demand. I'm a computer systems engineer with more that 20 years of experience implementing all kind of software systems, I've been working independently for the last 6 years. I have programmed and published applications with Android, iOS and Web in different areas from newspapers, paper and electronic libraries, government portals, travel agencies, courier deliveries, and payment gateways, also geolocation data systems, push messaging, API REST, Amazon Web Services and Linux administration. My areas of expertise include PHP, MySQL, Firebase, Javascript, React.js and React native