Jerin John
Software Engineer at google
Summary
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RockstarJerin John is a software engineer with nine years of hands-on experience building backend systems and contributing to high-profile open-source projects. He has tangible expertise in SQL parsing and execution, evidenced by adding advanced regular-expression SQL functions to the widely used Apache Calcite project and enabling BigQuery-compatible functionality. Based in India and self-described as a technophile, he blends pragmatic engineering with curiosity about language-level features and database behavior. Jerin tends to work on non-obvious, impactful areas—extending core query capabilities and tests—demonstrating both deep domain knowledge and attention to correctness in complex systems.
9 years of coding experience
Github Skills (9)
apache-calcite10
regular-expression10
javas10
big-data10
sqlfunction10
sql10
java10
calc10
testing9
Programming languages (3)
Github contributions (5)
apache/calcite
Jul 2023 - Nov 2024
Apache Calcite
Role in this project:
Back-end Developer
Back-end DeveloperContributions:71 reviews, 8 PRs, 72 comments in 1 year 4 months
Contributions summary:Jerin primarily contributed to the implementation of new SQL functions within the Apache Calcite project. Their work involved adding the `REGEXP_CONTAINS`, `REGEXP_EXTRACT`, `REGEXP_EXTRACT_ALL` and `REGEXP_INSTR` functions, as well as enabling the `REGEXP_REPLACE` function within the BigQuery library. The commits show the addition of these new functions in core files and tests. They also modified existing test suites to incorporate these new functions, demonstrating a strong understanding of the project's SQL parsing and execution.
geospatialapache-calcitesqlapachebig-data
Anthrino/EruditeX
Apr 2018 - Apr 2021
A Comprehension-based Question Answering System that extracts semantic and syntactic understanding from text through deep learning.
Contributions:4 PRs, 3 pushes in 3 years 1 month
nlpquestionunderstandingbertnatural-language-generation
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