Esref Ozturk
Lead Engineer at Sazak Techs
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolEsref Ozturk is a lead engineer and entrepreneurial technologist with 12 years of experience building scalable systems and leading cross-functional teams from Berlin. He currently drives technical strategy for performance testing, traffic forecasting and continuous readiness at Klarna while also advising and delivering projects through Toptal and his own company, Sazak Techs. His background spans full-stack and mobile development, cloud architectures on AWS, and MLOps—he even built an LSTM-based accident-detection system when founding Drive Buddy. Early open-source work includes contributing a Hibernate integration and Derby support to the well-known Hazelcast code samples, reflecting a practical focus on database caching and integration. Esref pairs hands-on engineering with people leadership, mentoring teams to ship reliable, production-grade services. Curious by nature, he combines deep systems R&D experience from academic and security-focused projects with product-driven execution.
12 years of coding experience
8 years of employment as a software developer
Master of Science (M.S.) Computer Engineering, Master of Science (M.S.) Computer Engineering at Orta Doğu Teknik Üniversitesi / Middle East Technical University
Turkish, English, German
Stackoverflow
346reputation
13kreached
6answers
2questions
Github Skills (16)
javas10
databases10
hibernate10
data-integration10
sql-database10
java10
configuration-management9
html6
css6
php6
nic6
intel6
chartjs6
network-interface6
python6
Programming languages (4)
Github contributions (5)
hazelcast/hazelcast-code-samples
Jul 2014 - Jul 2014
Hazelcast Code Samples
Role in this project:
Back-end Developer
Back-end DeveloperContributions:33 commits in 13 days
Contributions summary:Esref primarily focused on developing and integrating a Hibernate module within the Hazelcast code samples. The contributions involve creating database-related classes, configuring Hibernate, and implementing functionalities like adding, listing, deleting, and changing between sessions. The user also modified configuration files to adapt Hibernate's behavior, particularly regarding caching and the use of a native client for Hazelcast. Furthermore, the user created a database using Derby and made changes to enable the project to be used with Derby database.
javahazelcastin-memoryscalability
multiclip/multiclip.github.io
Jul 2014 - Feb 2016
Contributions:26 commits in 1 year 7 months
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