Roberto Lozano
Senior Member Of Technical Staff at Oracle
Stockholm County, Sweden
Summary
🤩
Rockstar🎓
Top SchoolRoberto Lozano is a Senior Member of Technical Staff at Oracle with 11 years of experience building and optimizing the HotSpot JVM compiler. He holds a PhD from KTH and has a strong research background in programming languages, software testing, verification, and combinatorial optimization, having led the Unison project that applied constraint programming to compiler optimization. Roberto's contributions to the OpenJDK JDK repository focus on C2 compiler improvements, machine-code generation, and performance fixes, reflecting both deep systems knowledge and practical impact on a flagship open-source platform. Before Oracle he bridged academia and industry as a research associate at the University of Edinburgh and as a researcher at SICS, transferring compiler research into production at Ericsson. He combines rigorous research credentials with hands-on engineering skills in performance-critical systems, and his work has attracted academic recognition and industrial adoption. Based in Stockholm County, he brings a rare mix of formal methods expertise and pragmatic compiler engineering.
11 years of coding experience
11 years of employment as a software developer
Doctor of Philosophy - PhD, Information and Communication Technology, Doctor of Philosophy - PhD, Information and Communication Technology at KTH Royal Institute of TechnologyUniversitat Politècnica de València
Github Skills (9)
openjdk10
javas10
code-optimization10
jvm10
java10
garbage-collection7
arm4
x864
x86-644
Programming languages (3)
Github contributions (5)
openjdk/jdk
Sep 2020 - Apr 2025
JDK main-line development https://openjdk.org/projects/jdk
Role in this project:
Back-end Developer
Back-end DeveloperContributions:498 reviews, 93 PRs, 987 comments in 4 years 7 months
Contributions summary:Roberto primarily contributed to the Java Development Kit (JDK) core functionality, focusing on optimization and bug fixes within the compiler and related modules. Their work involved modifying and improving the performance of various components, specifically in the areas of the C2 compiler and machine code generation. The user's commits addressed issues and improved the handling of memory structures and instruction optimizations within the C2 compiler. The user also worked on cleaning up unused or deprecated code.
openjdkjavajvmjdk
robcasloz/jdk
Sep 2020 - Apr 2025
JDK main-line development
Contributions:895 pushes, 197 branches in 4 years 7 months
javajvmjdk
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