Diko Ko
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dikoko.bsky.social
Diko Ko
@dikoko.bsky.social
55 followers 74 following 180 posts
An engineer and producer.
An ex-game dev / An aspiring indie game creator.
Blog: https://www.invisiblefriends.net
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dikoko.bsky.social
www.invisiblefriends.net/dikos-theorem/
Diko's Theorem
This blog hasn’t been very technical lately (it’s been mostly travel notes and personal reflections), but a topic resurfaced recently, and I wanted to put it down before it fades—It's just hours befor...
www.invisiblefriends.net
November 22, 2025 at 1:44 AM
dikoko.bsky.social
www.invisiblefriends.net/swing-to-the...
Swing to the Fences
A few weeks ago, I renewed my Giants Flex membership. I originally thought it auto-renewed, but apparently it didn’t — until someone from the Giants called and nudged me. During the renewal process, I...
www.invisiblefriends.net
November 22, 2025 at 12:40 AM
dikoko.bsky.social
www.invisiblefriends.net/nightfall-at...
Nightfall at Filoli
Filoli has always been one of my family’s go-to weekend stroll spots. The elegant historic house, the manicured gardens with seasonal flowers, and the quiet trails through ranch-style countryside alwa...
www.invisiblefriends.net
November 17, 2025 at 7:02 AM
dikoko.bsky.social
www.invisiblefriends.net/time-and-aga...
Time and Again
Our last Salle's book club pick was Time and Again by Jack Finney. We picked it because in the afterword of 11/22/63, Stephen King called it a great time-travel novel—even saying he wanted to dedicate...
www.invisiblefriends.net
November 3, 2025 at 7:07 AM
dikoko.bsky.social
www.invisiblefriends.net/the-end-of-t...
The End of the 2025 Season
Now, officially, the baseball season is over. The result wasn’t what I NEVER wanted — the Dodgers won the World Series two years in a row. As a Giants fan, I was really frustrated watching yesterday’...
www.invisiblefriends.net
November 3, 2025 at 6:22 AM
dikoko.bsky.social
www.invisiblefriends.net/fleet-week-s...
Fleet Week SF 2025
Fleet Week has always been a yearly ritual for my family — though, honestly, not always a smooth one. In 2022, I learned the name of San Francisco’s true nemesis: Karl the Fog. 2023 was a little bette...
www.invisiblefriends.net
October 26, 2025 at 6:07 AM
dikoko.bsky.social
www.invisiblefriends.net/new-seventee...
NEW: Seventeen World Tour in U.S.
Speaking of LAFC — I actually visited their home, BMO Stadium, last Friday. But this time, it wasn’t for a soccer match. It was for the K-pop boy band Seventeen's concert. My daughter had declared th...
www.invisiblefriends.net
October 22, 2025 at 6:17 AM
dikoko.bsky.social
www.invisiblefriends.net/earthquakes-...
Earthquakes vs LAFC
On a Saturday last month (precisely September 13, 2025), my family headed to Levi’s Stadium — not for a 49ers game or a concert, but for something completely different: an MLS match featuring the San ...
www.invisiblefriends.net
October 20, 2025 at 6:07 AM
dikoko.bsky.social
Spoke at K-PAI on the architecture of the online advertising ecosystem — how AI/ML now power every layer, from publishers to advertisers. www.invisiblefriends.net/speaking-at-...

#AdTech
Speaking at K-PAI: A 30,000-Foot View of the Online Advertising Ecosystem
I recently had the pleasure of speaking at the K-PAI event, sharing an architectural overview of the online advertising ecosystem — from publishers and SSPs to exchanges, DSPs, and advertisers — and h...
www.invisiblefriends.net
October 17, 2025 at 5:28 AM
dikoko.bsky.social
www.invisiblefriends.net/sf-giants-20...
SF Giants 2025
Today marks the saddest day of the year: the final game of the Giants’ season. Once again, October baseball slips away, and the journey ends here. Last year, I shared how much I enjoyed the $1,000 Fl...
www.invisiblefriends.net
September 29, 2025 at 5:21 AM
dikoko.bsky.social
www.invisiblefriends.net/expedition-33/
Expedition 33
Let me just say it straight. "Clair Obscur: Expedition 33" is the best game I’ve played since "The Legend of Zelda: Breath of the Wild." When the game was first announced, it caught attention not jus...
www.invisiblefriends.net
September 28, 2025 at 4:20 AM
dikoko.bsky.social
www.invisiblefriends.net/vintage-comp...
Vintage Computer Festival 2025
As I mentioned in my previous post about Ultima IV, my first personal computer was an Apple II+ (replica). The Apple IIe and II GS were my dream machines growing up — the ones I never got to own. So, ...
www.invisiblefriends.net
September 15, 2025 at 6:06 AM
dikoko.bsky.social
www.invisiblefriends.net/la-2025/
LA 2025
Last month, we took a summer family trip to Los Angeles. The highlight was a two-day visit to Universal Studios — but we packed a few other stops along the way too. Right before we headed to the stay...
www.invisiblefriends.net
August 30, 2025 at 9:59 PM
dikoko.bsky.social
My story (sorry, only in Korean) toss.tech/article/toss...
토스 피플: 50살, 엔지니어로 살아남는 법
90년대 게임 개발자로 시작해, 글로벌 회사와 창업을 거쳐 Toss USA에 합류하신 Diko님의 이야기를 들려드려요.
toss.tech
August 28, 2025 at 5:46 AM
dikoko.bsky.social
www.invisiblefriends.net/11-22-63/
11/22/63
I just realized I I realized I forgot to update my last Salle’s Book Club read: “11/22/63.” Many Americans probably recognize the date right away — it’s the day President Kennedy was assassinated. The...
www.invisiblefriends.net
August 4, 2025 at 5:52 AM
dikoko.bsky.social
www.invisiblefriends.net/ado-hibana-w...
Ado Hibana World Tour 2025
While Huntrix and the Saja Boys might rule the world music charts, my personal favorite is Ado — a Japanese singer who’s built a reputation not just for her songs, but for her mystery. Known as a “fac...
www.invisiblefriends.net
July 23, 2025 at 5:11 AM
dikoko.bsky.social
www.invisiblefriends.net/a-proud-dadd...
A Proud Daddy Moment
I’ve got a backlog of posts piling up, but this one couldn’t wait. Last week, I visited Washington D.C. for the first time — not for tech, not for work, but for something far more special: my daughte...
www.invisiblefriends.net
June 16, 2025 at 7:01 AM
dikoko.bsky.social
www.invisiblefriends.net/new-start/
New Start
It’s been over a month since my last post, and I’ve had a busy start at my new role with Viva Republica. You might recognize the company better by its flagship service, Toss—South Korea’s leading fint...
www.invisiblefriends.net
June 14, 2025 at 6:57 AM
dikoko.bsky.social
Proud daddy moment.
June 12, 2025 at 3:28 AM
dikoko.bsky.social
June 8, 2025 at 2:20 AM
dikoko.bsky.social
June 8, 2025 at 2:19 AM
dikoko.bsky.social
Catch on the field 2025.
June 8, 2025 at 2:18 AM
dikoko.bsky.social
Saturday. Could be my last Korean president election.
May 24, 2025 at 11:15 PM
dikoko.bsky.social
…
May 22, 2025 at 6:32 PM
dikoko.bsky.social
Yep, I’m back. This is the Bay Area.
May 17, 2025 at 6:27 PM