Jovansonlee Cesar
Software Engineer
Cebu, Philippines
Summary
🤩
Rockstar🎓
Top SchoolJovansonlee Cesar is a software engineer with 11 years of experience building backend systems, core libraries, and blockchain protocols from Cebu, Philippines. He has moved from data-heavy Java systems and graphics/math-heavy game tooling to leading protocol work at ChainSafe, migrating Substrate pallets and integrating smart contracts across Arweave, NEAR, and Solana. A Rust library creator and active contributor to the popular datafusion-sqlparser-rs project, he has implemented SQL features like INSERT parsing and PostgreSQL-style casting while refactoring parser internals. Comfortable hiring and mentoring engineers, he also prototyped cross-platform mobile solutions and experimental projects, blending deep systems knowledge with practical product delivery. Notably, his background includes both large-scale data processing and low-level protocol engineering, giving him a rare full-stack perspective on blockchain infrastructure.
12 years of coding experience
13 years of employment as a software developer
Bachelor of Science (B.S.), Computer Engineering, Bachelor of Science (B.S.), Computer Engineering at Bohol Island State University
Filipino, English
Github Skills (7)
sql-parser10
parser10
rust10
parsing10
sql10
parse10
big-data9
Programming languages (18)
Github contributions (5)
apache/datafusion-sqlparser-rs
Sep 2018 - Jun 2020
Extensible SQL Lexer and Parser for Rust
Role in this project:
Back-end Developer
Back-end DeveloperContributions:26 commits, 4 PRs, 10 comments in 1 year 9 months
Contributions summary:Jovansonlee contributed to the development of the SQL parser for the Rust-based datafusion-sqlparser-rs repository. Their contributions included implementing features such as parsing INSERT statements, adding PostgreSQL-style casting, and adding Boolean value data type. They also refactored code, removing debugging statements and improving the create statement parser.
lexerparserrustsqlbig-data
ivanceras/curtain
May 2015 - Jan 2018
Moved to https://github.com/ivanceras/diwata
Contributions:173 commits, 110 pushes, 1 branch in 2 years 8 months
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