Working as a consultant. Some of the client projects include
Midtrans - a leading payment gateway in Indonesia. I was part of the team which develops the snap product, an embeddable payment form. I helped them migrate their notification system to Elixir stack to improve throughput and resource consumption, built the initial version of centralized auth server based on oauth protocol, built a Kafka to Elasticsearch data ingestion pipeline in Elixir, built a streaming report generation system that could export hundreds of thousands of rows of data in xlsx and csv format while maintaining constant memory overhead. Some of the libraries — namely redix_sentinel, barlix, xml_stream and zstream — are open-sourced.
EnerNOC - I was a core member of the team that developed Energy Manager, a web app used by professionals to visualize and understand energy usage. I have touched many parts of the system. My main contribution includes writing and improving various charts like load profile, consumption, heatmap etc using d3. I have also written an automated test system to generate charts for various combinations of state and compare their screenshots with previous versions to catch regression and a library named μ to compress url parameters.
Placeley - I was part of the two member team that developed the web app and the backend for placeley, a geo location social network for places.
Developed and deployed a web based business process management system. Used several technologies including nginx, unicorn, rails, solr, mysql, amazon ec2, amazon ses, qpsmtpd, redis, oauth, capistrano. Authored a WYSIWYG Form Editor similar to wufoo.com.
Worked with a team that developed and deployed a personal health record management system. Used several technologies including mongodb, sinatra, nginx, thin, beanstalk.
NEato - Nintendo emulator written in go.
Fake Dynamo - Amazon Dynamodb emulator.
Tide - TypeScript Interactive Development Environment for Emacs.
Webify - webfont generator - converts ttf to woff, eot and svg.
Memcachex - Memcached client for Elixir.