Heejong Lee
Software Engineer at Meta
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolHeejong Lee is a seasoned software engineer with 14 years of experience building scalable streaming data systems, static-analysis tooling, and microservice architectures, now based in San Francisco. His work as an Apache Beam committer and Google engineer improved portability and I/O stability across runners and languages, and he has contributed Python-side fixes to the widely used Apache Beam project. At Semgrep he enhanced analysis quality across multiple languages and designed cross-file PR scanning to dramatically cut scan times while preserving accuracy. Earlier roles include leading development of Sparrow, a prominent static-analysis testing solution in Korea, and building analyzers and data proxy services at FireEye. Heejong blends deep research-rooted expertise (UC Berkeley visiting scholar) with pragmatic production engineering, often surfacing subtle language/runtime interoperability issues before they impact users.
14 years of coding experience
16 years of employment as a software developer
Master of Science (MS) Computer Science, Master of Science (MS) Computer Science at Seoul National UniversityBachelor of Science (BS) Computer Science, Bachelor of Science (BS) Computer Science at Korea Advanced Institute of Science and Technology
English, Korean
Stackoverflow
1,466reputation
51kreached
22answers
1question
rubygems
top-5%
Github Skills (16)
data-pipeline10
data-pipelines10
apache-beam10
python10
rubygems9
gcp9
bigquery9
testing8
google-cloud-dataflow6
static-analysis6
abstract-interpretation6
google-cloud-pubsub6
compiler-construction6
dataflow6
ruby6
Programming languages (12)
Github contributions (5)
apache/beam
Oct 2018 - Nov 2022
Apache Beam is a unified programming model for Batch and Streaming data processing.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 286 reviews, 355 commits in 4 years 1 month
Contributions summary:Heejong primarily focused on improvements and bug fixes within the Python codebase of the Apache Beam project. Their contributions include removing redundant code, addressing normalization of HTTP client initialization and usage, and resolving issues in the data pipelines. They also worked on improving the handling of errors for BigQuery streaming inserts and addressing deprecation warnings in tests.
golangpythonstreaming-databeambatch
ihji/sbt-antlr4
Nov 2013 - Dec 2021
Antlr4 plugin for sbt 1.1+ and 0.13.x
Contributions:72 commits, 12 PRs, 41 pushes in 8 years 2 months
scalasbtantlr4
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