Oby Sumampouw
CTO & Co-founder at Cermati.com
Indonesia
Summary
👤
Senior🎓
Top SchoolOby Sumampouw is a seasoned technology leader and co-founder with 13 years of experience building and scaling consumer finance platforms as CTO of Cermati Group, Indonesia's leading financial product marketplace. He combines product-focused engineering with corporate strategy, having established tech, product, HR, legal and operations functions that supported expansion into lending, insurance and investment products. Prior to Cermati he spent several years at LinkedIn driving high-scale service infrastructure and content systems, contributing to Rest.li and improving its robustness and documentation. Oby's background blends hands-on backend systems expertise (Java, Netty, Zookeeper) with organizational design—he shaped deployment, code review and CI/CD practices early in the company. He also has research lab experience and an MS in Computer Science from Stanford, reflecting a multidisciplinary approach to problem solving. A pragmatic open-source contributor, he has addressed subtle production issues like race conditions in Rest.li’s transport client while improving maintainability through clearer javadoc.
13 years of coding experience
6 years of employment as a software developer
BS, Biochemistry, Microbiology, BS, Biochemistry, Microbiology at University of WashingtonMCIT, Computer Science, MCIT, Computer Science at University of PennsylvaniaMS, Computer Science, MS, Computer Science at Stanford University
Japanese, Spanish, Indonesian, javanese
Github Skills (9)
javas10
api-rest10
rest-api10
javadoc10
api-design10
restful-api10
java10
concurrency9
zookeeper9
Programming languages (4)
Github contributions (5)
linkedin/rest.li
Oct 2012 - Sep 2014
Rest.li is a REST+JSON framework for building robust, scalable service architectures using dynamic discovery and simple asynchronous APIs.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:81 commits in 1 year 10 months
Contributions summary:Oby primarily focused on improving code quality and documentation within the Rest.li framework. They removed unnecessary javadoc comments, updated example names in javadoc, and added javadoc to multiple classes, specifically within the `d2` directory. Furthermore, the user addressed comments from code reviews, refining javadoc to clarify usage and intent, and introduced a timing delay to mitigate potential race conditions in transport client refresh logic. These changes contribute to maintainability and clarity of the codebase.
architecturesapiscalableasynchronousrestful
osumampouw/grpc_test_node
May 2020 - Jun 2020
scratch project for testing grpc in node.js
Contributions:7 pushes, 1 branch in 13 days
node-jstestinggrpcgrpc-testingnodejs
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