Yoonseo Hong

Senior Software Engineer, Sea - Python · Scala · Lucene

Sea

Seoul, South Korea · KST (UTC+9)

7+ years experience

University of Tokyo

English, Korean

Open to work

Messaging unavailable

Overview

7 years in software engineering, the last 2 at Sea, where I work on the search team. Shipped a rewrite that took build times from 25 minutes to under 4. Cut p99 latency on the search services from 334ms to 170ms. Before that: Lenovo and PwC. Cyclist - trying to do a century this year.

Good reasons to reach out

Roles in search and ranking
Working sessions on Scala
Speaking or podcast invitations

Please don't message about

Offshore staffing offers
Unpaid work or spec projects
Requests to fix your code for free

Replies on weekday evenings

Skills

A/B testingLucenelearning to rankPythonElasticsearchJavaScala

Open to workLooking for a role

closes in 3 months

Lead Software Engineer roles in wealth management - Seoul or remote

Target roles: Lead Software Engineer
Level: Senior
Industries: Climate tech, Fintech
Work mode: On-site
Available: Immediately
Work authorization: Authorized to work in South Korea
What I'm looking for: Scope to lead search and ranking work, with a manager who gives direct feedback.
Not interested in: Contract-only roles

7 years in search and ranking. Strongest at Java and Python. Available from next month.

Seoul, South Koreaelasticsearchscalalucene

Open

Experience

Senior Software Engineer
Dec 2024 - Present
Sea · 1 yr 10 mo · Full-time · Seoul, South Korea
- Cut p99 latency on the search services from 847ms to 47ms.
- Mentored 6 engineers through their first promotion.
- Built the experimentation framework 36 product teams use to ship changes safely.
Software Engineer
Sep 2023 - Dec 2024
Lenovo · 1 yr 3 mo · Full-time · Seoul, South Korea
- Shipped 16 launches on the search team without a rollback.
Software Engineer
Mar 2022 - Sep 2023
PwC · 1 yr 6 mo · Full-time · Seoul, South Korea
- Cut p99 latency on the search services from 558ms to 96ms.
- Brought on-call pages for search down from 38 a week to 2.
Software Engineer
Jul 2019 - Dec 2021
Traveloka · 2 yr 5 mo · Full-time · Seoul, South Korea
- Shipped a rewrite that took build times from 22 minutes to under 2.

References

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Education

University of Tokyo
BEng, Information Technology
2015 - 2019

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