Aleksei Efimov
Software Development Manager at Oracle
Dublin, Ireland
Summary
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Rockstar🎓
Top SchoolAleksei Efimov is a Software Development Manager in Dublin with 13 years of experience building and leading teams at Oracle, where he progressed from senior engineer to principal developer and now manages software delivery. He has deep expertise in core Java networking and platform internals, and contributes to OpenJDK with fixes improving XML/SOAP processing and SAX exception handling—work that impacts a widely used, foundational Java project. His background includes avionics-grade Linux platform development and DO-178B testing, reflecting strong systems thinking and rigor in safety-critical environments. Known for solving subtle interoperability and initialization bugs, he combines hands-on engineering with people leadership to improve reliability across large-scale, low-level systems.
13 years of coding experience
18 years of employment as a software developer
Master's degree, Computer Science, Master's degree, Computer Science at Saint-Petersburg State Polytechnical University
English, Russian
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (7)
xml10
openjdk10
javas10
sax10
java10
soap10
jvm9
Programming languages (1)
Github contributions (5)
openjdk/jdk
May 2020 - Dec 2025
JDK main-line development https://openjdk.org/projects/jdk
Role in this project:
Back-end Developer
Back-end DeveloperContributions:180 reviews, 30 PRs, 204 comments in 5 years 8 months
Contributions summary:Aleksei's contributions center on modifications to the Java Development Kit (JDK), specifically targeting the Java XML Web Services and SAXException classes. The user addressed bugs related to namespace handling within SOAP messages and corrected issues with initializing causes in SAXException objects. These changes reflect a focus on improving the reliability and functionality of XML processing components within the JDK.
openjdkjavajvmjdk
AlekseiEfimov/jdk
Sep 2020 - Apr 2026
JDK main-line development
Contributions:224 pushes, 49 branches in 5 years 7 months
javajvmjdk
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