Hyun Jin - Software Engineer at Meta

Hyun Jin

Software Engineer at Meta

Ridgefield, New Jersey, United States

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Summary

👤

Senior

🎓

Top School

Hyun Jin is a software engineer with 11 years of experience focused on mobile performance and back-end optimization, currently improving the performance and size of Android apps at Meta. He brings deep systems-level expertise, having contributed to Facebook’s Redex bytecode optimizer—adding symbolication metadata, IODI control flags, and refactors to improve debug info and min-API handling. Past internships at Facebook, Yelp, and Bloomberg show a consistent track record of building tooling and datasets that surface actionable metrics and save engineering time. A Tufts CS graduate with a 3.8 GPA, he combines rigorous academic grounding with practical performance engineering chops and a knack for making complex debugging and monitoring workflows more reliable.

11 years of coding experience

2 years of employment as a software developer

Bergen County Academies

Bachelor’s Degree, Computer Science, 3.8, Bachelor’s Degree, Computer Science, 3.8 at Tufts University

English

Github Skills (12)

performance-tuning10

debugging10

code-optimization10

debug10

bytecode10

android10

optimization10

java9

cprogramming-language9

c-language9

javas9

build-system8

Programming languages (4)

JavaC++CEmacs Lisp

Github contributions (5)

facebook/redex

Oct 2020 - Jun 2022

A bytecode optimizer for Android apps

Role in this project:

Back-end Developer & Performance Engineer

Contributions:18 commits in 1 year 7 months

Contributions summary:Hyun primarily contributed to the optimization of the bytecode optimizer, Redex, for Android apps. Their work involved refactoring debug info generation, including addressing issues related to min API versions and ensuring correct symbolication. Furthermore, they added features like the ability to emit symbolication metadata for detached methods and introduced flags to control IODI optimizations and layer modes, demonstrating a focus on performance and debugging capabilities. The user also addressed several issues in the symbolication tools and test suite.

android-appsandroidbytecodekotlinoptimizer

danjin250/scrabbleSolver

Jan 2015 - Mar 2015

Contributions:1 push, 1 branch in 1 month

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