Amateur programmer.
Some of my projects:
https://play.google.com/store/apps/details?id=com.sutriadi.mobile.perpusdikbud
https://play.google.com/store/apps/details?id=com.sutriadi.id.ung.ac.lib.opac
https://play.google.com/store/apps/details?id=com.sutriadi.ktg.rup
https://play.google.com/store/apps/details?id=com.sutriadi.malang.uin
https://play.google.com/store/apps/details?id=com.sutriadi.id.ac.isi.opac