L4 · Library
Library
Writing, publications, models and talks.
Blog
Oct 9, 2026ENID
How we made a voice agent interruptible
Barge-in on a speech-to-speech contact-center agent broke in two ways. How both were fixed, how a small controlled A/B measured about 2 s down to 0.2 s, and the experiments the data rejected.
Oct 9, 2026ENID
Why the better fraud engine shipped in shadow mode
A hybrid rules plus LLM engine cut false positives on clean packets from 36.4% to 9.1% offline, then failed its recall gate. Why it runs in production shadow mode instead of deciding anything.
Oct 9, 2026ENID
45% of our LLM calls failed: what the error strings told us
About 45% of CV screening evaluations failed in a 22-pair run. Two error strings, two root causes, a layered fix and seven regression tests built from the real failures.
Oct 9, 2026ENID
Spec-driven development with AI coding agents
A vendor portal built by one engineer in about six weeks: numbered specs first, AI coding agents behind CI gates, every merge decided by a human, and the bugs the process still missed.
Jun 6, 2025ID
The Sun, The Moon, and The Dark Sea
A personal essay on growing up, finding direction and staying steady, written in Bahasa Indonesia.
Feb 28, 2022IDOn Medium
CRUD in Node.js with the Express Framework and MySQL (opens in a new tab)
A beginner-friendly tutorial for building a CRUD REST API with Express and MySQL (in Bahasa Indonesia).
Dec 31, 2020IDOn Medium
UI/UX Design Case Study: A Baby Development Tracking App (opens in a new tab)
How we designed Helby, an app that helps parents track their baby's development, from research to prototype (in Bahasa Indonesia).
Publications and models
Model · 2024 · Hugging Face
IndoBERTweet app-review sentiment model (opens in a new tab)
Model · 2024 · Hugging Face
Paper · 2023
Aplikasi Sentiboard (Dashboard Sentimen Universitas Menggunakan Model IndoBERT) (opens in a new tab)
Thesis · 2023 · Telkom University
Sentiboard: University Sentiment Dashboard Using IndoBERT (opens in a new tab)
Model · 2022 · Hugging Face
IndoBERT sentiment model for Indonesian university reviews (opens in a new tab)
Paper · 2021
Indonesian Digital Wallet Sentiment Analysis Using CNN and LSTM Method (opens in a new tab)
Paper · 2021
Study on the Dynamics of COVID-19 Cases in Achieving Herd Immunity in Indonesia (opens in a new tab)
Talks and workshops
Oct 2026 · Author
From one request to a tool-using, traced agent with Microsoft Agent Framework
Microsoft Agent Framework developer workshop deck (Python)
Sep 2026 · Author
Transform business performance with Microsoft AI
Client AI workshop for an industrial enterprise (deck author)
Mar 2022 · Trainer
Basic Artificial Intelligence study groups
Telkom University (Lecturer Assistant)
Jan 2022 · Trainer
Hackathon judge and team mentor
Motion Laboratory hackathon, Telkom University
Sep 2020 · Trainer
Programming fundamentals in Go (practicum)
Telkom University (Practicum Assistant)
Jan 2020 · Trainer
Programming club workshops and competitions
Proclub Telkom University