Core Team

Umur Cubukcu

Umur developed new business with world's leading retailers and consumer goods companies (among them Wal-Mart, Kimberly-Clark, and L'Oreal) and sold enterprise software while at TrueDemand, a demand analytics start-up in California. Before that, Umur worked on numerous projects around the globe with the Boston Consulting Group. Most recently, Umur was the CEO of, where he helped put the company on a growth path. Umur holds an M.S. in Management Science & Engineering from Stanford University, and a B.S. in Industrial Engineering from Bogazici University.

Ozgun Erdogan

Ozgun worked as a software developer for four years in the Distributed Systems Engineering team at Amazon. There, he proposed, designed, and implemented novel algorithms on distributed caching and consistency; and also worked on building systems for scalable data analytics. Ozgun earned his M.S. in Computer Science from Stanford University, and his B.S. from Galatasaray University. He also holds patents on distributed cache consistency and load balancing.

Sumedh Pathak

Sumedh worked as a software development engineer for over five years at While there, he optimized the fulfillment workflow software for Amazon’s supply chain, and extended the shopping cart application. Sumedh has extensive experience both on distributed data stores such as Dynamo, as well as relational stores such as Oracle; he regularly worked on these systems during his days in the ordering and shopping cart teams. Sumedh earned his M.S. in Computer Science from Stanford University, and his B.S. from the University of Minnesota.

Hadi Moshayedi

Hadi studied IT Engineering at Amirkabir UT, and also Master of Computer Science at Sharif University of Technology in Iran.

Metin Doslu

Metin worked as a software developer on different projects including a train traffic control center and a cloud platform for mobile devices. Metin also participated in the ESPN Winning Formula Challenge powered by TopCoder, and took 2nd place with his predictive algorithm for College Football game scores. Metin holds B.S. and M.S. degrees in Computer Science from Bogazici University.

Utku Azman

Utku led Intel's business development activities with strategic partners including software vendors, system integrators and hardware manufacturers to target the large enterprise market in Turkey. Prior to that he served as a Strategy Director at Oracle responsible for large software deals in Eastern Europe, Turkey and Central Asia. Previously, Utku worked as a consultant at McKinsey's Business Technology Office in London, working on projects with enterprises across Europe. Earlier in his career, Utku worked as a Product Manager at Google and as a Systems Engineer at Alcatel-Lucent. Utku holds M.S. and B.S.degrees in Electrical Engineering from Cornell University and an M.B.A. from London Business School.

Samay Sharma

Samay is a software developer at Citus Data. He crossed paths with Citus after taking an Interview Street Code Sprint, and placing among the top %0.5 of all candidates. That initially led to his internship at Citus, where he worked on the MongoDB foreign data wrapper. He also worked on various other projects during his time in school, including an intrusion detection system, a Wikipedia Search Engine, and a review summary engine. Samay holds a B.Tech in Computer Science from IIIT-Hyderabad, India.

Jason Petersen

At Amazon, Jason drove the design, implementation, and operation of a new distributed real-time cloud monitoring service, CloudWatch. From there he made a drastic change to crafting cutting-edge web interfaces at the small startup TrackSimple, which was quickly acquired by a slightly larger startup, BlueKai. After three years in the UI world, Jason decided to return to his roots in distributed systems, arriving at Citus Data in December 2013. Jason holds a BS in CS from the University of Texas at Austin and lives in Denver with his wife, baby boy, and neurotic—but clever—dog.

Marco Slot

Marco joins us from Harlem, the Netherlands. Marco has an M.S. in Parallel and Distributed Computer Systems from VU University Amsterdam and completed a PhD on cooperative self-driving cars at Trinity College Dublin. While studying, he also worked as a software engineer on Amazon CloudFront and Route 53 for several years, driving the design of latency-driving request routing and several other key features.

Önder Kalaci

Önder worked on different projects including environmental monitoring systems and unified threat management (UTM). He holds B.S. degree from METU and M.S. degree from Boğaziçi University in computer engineering. His main interest is thread level parallelism.


Josh Berkus

Josh Berkus is a member of the PostgreSQL Core Team, and is CEO of the consulting company PostgreSQL Experts Inc., where he often helps customers develop data warehousing solutions. Prior to PostgreSQL Experts, Josh was in charge of PostgreSQL for Solaris at Sun Microsystems, and he helped launch data warehousing startup GreenPlum. He has previously been on the advisory boards for business intelligence company Actuate, PostgreSQL vendor EnterpriseDB, and NoSQL vendor CouchDB.