Grzegorz Rożniecki
Director Of Engineering at Akamai Technologies
Krakow, Lesser Poland Voivodeship
Summary
👤
Senior🎓
Top SchoolGrzegorz Rożniecki is a Director of Engineering with 13 years of experience leading observability and distributed systems teams at Akamai from hands-on engineering to senior management. He builds cultures of trust and psychological safety that empower cross-functional teams to deliver reliable, high-performance monitoring platforms used across the company. Technically grounded as a former backend and Big Data engineer, he contributes to open-source Java projects (notably enhancements to the jOOλ library) and retains a pragmatic coder’s mindset while operating at scale. Based in Krakow and trained in mechatronics and robotics, he blends systems thinking with people-first leadership to turn complex requirements into operational solutions. Colleagues cite his curiosity and servant-leader approach as the reason teams take on and achieve ambitious, often non-obvious goals.
12 years of coding experience
16 years of employment as a software developer
Bachelor of Engineering - BE, Mechatronics, Robotics, and Automation Engineering, Bachelor of Engineering - BE, Mechatronics, Robotics, and Automation Engineering at AGH University of Krakow
Stackoverflow
27,695reputation
3.4mreached
368answers
10questions
java
top-1%
spring
top-1%
caching
top-1%
javascript
top-5%
subprocess
top-5%
closures
top-1%
Github Skills (37)
caching10
spring10
guava10
spring-security10
spring-mvc10
collector10
java10
javas10
streams-api10
functional-programming10
decimal10
scopes10
closures10
api-design9
testing9
Programming languages (8)
Github contributions (5)
jOOQ/jOOL
Jun 2016 - Nov 2016
jOOλ - The Missing Parts in Java 8 jOOλ improves the JDK libraries in areas where the Expert Group's focus was elsewhere. It adds tuple support, function support, and a lot of additional functionality around sequential Streams. The JDK 8's main efforts (default methods, lambdas, and the Stream API) were focused around maintaining backwards compatibility and implementing a functional API for parallelism.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:15 commits, 12 PRs, 21 comments in 5 months
Contributions summary:Grzegorz primarily contributed to improving the `jOOλ` library, focusing on enhancing existing functionality and addressing potential issues. Their work included implementing `Agg.percentRankBy()` in terms of `Agg.rankBy()`, adding `Seq#zipWithIndex(BiFunction)`, and introducing `Agg#first()` and `Agg#last()` collectors. The commits also address edge cases like handling `IOException` and fixing a copy-paste error in the javadoc, contributing to the library's robustness and user experience.
java-8streamsjdkmissingsupport-function
Xaerxess/guava
Oct 2015 - Jan 2018
Contributions:11 pushes, 7 branches, 3 tags in 2 years 3 months
googlejavacore-libraries
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