February 21, 2026 to present
GEODE
Autonomous Agent Harness
From observation to the next action.
See the work: GEODEWork
Jihwan Ryu
AI Agent Engineering · Backend & Infrastructure
I build agents whose decisions and actions can be traced and verified.
October 31, 2025 to February 10, 2026
Eco²
Backend · Cloud infrastructure
Recycling guidance from one photo and a conversation.
See the work: Eco²September 28, 2026 to October 4, 2026 · Completed
Railshot
AI deployment & operations platform
Deploy a locally built web app to prepared cloud and on-premises environments, then run it.
See the work: Railshot
April 2026 to May 2026
Kiki
Work signals and agent execution
So that a proposal becomes the assignee's execution.
See the work: Kiki
May 6, 2026 to May 26, 2026
Cotton
Translation workflow
Turning generated translations into reviewable results.
See the work: Cotton
CRUMB
Generative Game Studio · Demo
From a one-line game pitch to a playable draft, with the agents’ work in view and open to intervention.
See the work: CRUMBJihwan Ryu
AI Agent Engineering · Backend & Infrastructure
I design and build agent execution boundaries, backends and cloud infrastructure, and study the conditions under which a model's judgment carries through to real execution and verification.
What should be left to the model, and what should the system check? I design agent permissions and completion judgments, recovery for asynchronous work, and the path that takes verified code to deployment. I read execution records, isolate failures, and use them to scope the next experiment and implementation.
Social
Professional Experience
2026.10.16
LILT
AI Benchmark Engineer · freelance
Remote · $55/hr
- Korean tasks for Terminal-Bench-LILT
- Task environments built on Korean data
- Reference solutions · deterministic verifiers
- Difficulty calibrated on model runs
2026.03.16 — 2026.05.26
pinxlab
AI Research Engineer · AI R&D freelance
On-site · 3,000,000₩
- Kiki · work signals · approval · execution recovery
- REODE · Java/Spring migration
- Cotton · translation judgment · review flow
2024.12.09 — 2025.08.31
Rakuten Symphony Korea
Cloud Engineer (L5) · Cloud BU · full-time
Hybrid · 45,000,000₩ / 1yr + up to 10%
- Storage admin account lifecycle · authentication state
- Traced the kernel lock behind serialized reads
- Changed it to allow concurrent reads
Education
2024.07.01 — 2024.11.18
Kakao Tech Bootcamp
Software development training
2017.03.02 — 2023.08.25
Pusan National University
School of Electrical and Computer Engineering, major in Information and Computer Engineering · Bachelor of Engineering
AwardCertification
2025.12.02
Saessak Hackathon 2025 · Excellence Award
Eco² · 4th of 181 teams
2024.12
Engineer Information Processing
OPIc
ACTFL · English
- IH 2024.09.15 — 2026.09.14
- IM3 2026.09.21 — present