Andrei Stefan
Principal Software Engineer at Elastic
Romania
Summary
🤩
Rockstar🎓
Top SchoolAndrei Stefan is a Principal Software Engineer based in Romania with over 11 years building and supporting large-scale search and distributed systems at Elastic. He progressed from hands-on support roles to senior engineering and principal-level responsibilities, blending deep Java backend expertise with pragmatic customer-facing experience. Andrei has contributed to the flagship open-source Elasticsearch project, improving numeric type handling (BigInteger/BigDecimal) and fixing CSV/TSV and JSON formatting issues—demonstrating attention to data correctness and developer ergonomics. He pairs formal computer science training with a management master's, enabling him to navigate technical complexity while aligning engineering outcomes with business needs. Notably, his background in support gives him an uncommon operational perspective for a principal engineer, making him effective at shipping robust, user-centered features.
11 years of coding experience
19 years of employment as a software developer
Academia de Studii Economice BucurestiEngineer's degree, Computer Science, Engineer's degree, Computer Science at Universitatea „Politehnica” din București
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (12)
javas10
data-handling10
back-end-development10
java10
testing9
json9
elasticsearchquery8
elasticsearch8
elasticsearch-api8
amazon-elasticsearch8
sql8
aws-elasticsearch8
Programming languages (6)
Github contributions (5)
elastic/elasticsearch
Oct 2014 - Jan 2023
Free and Open Source, Distributed, RESTful Search Engine
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1428 reviews, 682 commits, 885 PRs in 8 years 4 months
Contributions summary:Andrei primarily focused on back-end development tasks within the Elasticsearch project. Their commits demonstrate proficiency in Java, specifically contributing to the implementation of features related to numeric type extraction from source documents. This included handling a wider range of numeric types like BigInteger and BigDecimal, showcasing attention to detail and a focus on improving data handling. They also contributed to bug fixes related to CSV/TSV formatting in SQL responses and incorporated new features like pretty printing in JSON format.
restfulsearch-engineopensearchelasticsearchjava
astefan/elasticsearch
May 2018 - Mar 2025
Open Source, Distributed, RESTful Search Engine
Contributions:653 pushes, 927 branches in 6 years 11 months
restfulsearch-enginedatabaseelasticsearchjava
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