Mustafa Koyunlu
Senior Software Engineer at Upstash
Istanbul, Istanbul, Türkiye Turkey
Summary
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Rockstar🎓
Top SchoolMustafa Koyunlu is a Senior Software Engineer with 13 years of hands-on experience specializing in concurrency and distributed systems, currently building at Upstash from Istanbul. He spent a decade at Hazelcast contributing to core management and monitoring features of a widely used real-time data platform, including scripting fixes and new request classes in the Java codebase. Mustafa combines deep backend expertise with practical operational insight into cluster properties and logging, enabling more robust observability for distributed deployments. He holds a Computer Engineering degree from Boğaziçi University and brings a pragmatic, systems-first approach to designing reliable, high-throughput services. Colleagues describe him as the kind of engineer who surfaces subtle runtime issues early, turning maintenance headaches into predictable behavior.
13 years of coding experience
10 years of employment as a software developer
Bachelor's degree, Computer Engineering, 3.01, Bachelor's degree, Computer Engineering, 3.01 at Boğaziçi Üniversitesi
English
Stackoverflow
405reputation
16kreached
10answers
2questions
Github Skills (14)
hazelcast10
javas10
distributed-systems10
java10
distributed-computing9
caching9
stream-processing8
realtime8
connections6
api6
boost6
spring6
spring-boot6
scala6
Programming languages (12)
Github contributions (5)
hazelcast/hazelcast
Dec 2012 - Apr 2021
Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:528 reviews, 55 commits, 1963 PRs in 8 years 5 months
Contributions summary:Mustafa implemented scripting fixes within the Hazelcast codebase. Their work involved modifications to several Java files, specifically focusing on the `com.hazelcast.impl.management` package, which suggests involvement in management and monitoring functionalities. These changes include the creation of new request classes and the modification of existing ones, indicating a focus on enhancing the management console's capabilities and potentially improving the handling of cluster properties and logging.
computationstream-processingbigtablereal-timestreaming-data
sancar/hazelcast-go-client
Dec 2017 - Nov 2021
Contributions:110 pushes, 33 branches in 3 years 11 months
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