About — Teguh Prasetyo

I started my career in IT operations in 2017, supporting infrastructure for one of Indonesia's largest parking operators. That role taught me how unforgiving production systems can be — and how much depends on a database that just keeps working.

From 2022 I moved fully into database engineering at PT Prima Integrasi Network, owning Oracle environments for clients including Jakarta Smart City, JNE, Askrindo, Bank Sahabat Sampoerna, BPKD DKI Jakarta, and BRI. The work spanned everything from Oracle RAC and Data Guard implementations, to data-center relocations, to 11g → 19c upgrades, and Spark/Hive ETL pipelines for AML.

Today I work as a Technical Consultant at PT Yasatech Sinergi Inspirasi, helping organizations design databases that survive real-world load, recover quickly, and stay easy to operate.

Outside of work I write about the things I figure out the hard way — installation guides, upgrade postmortems, performance tips — so the next person searching for the same error doesn't have to figure it out from scratch.

How I work

Systematic and detail-oriented

I plan thoroughly before execution, focus on the small things that break in production, and follow procedures consistently — change rolls out predictably.

Proactive in healthy teams

I move fastest in environments that value integrity, open collaboration, and continuous improvement — and I expect the same from myself.

Structured over chaotic

I do my best work with clear standards and well-framed change. Ambiguity should be reduced to one decision at a time, not absorbed all at once.

On the side

Day job is databases. After hours I work as an AI Engineer — building things that wouldn't be possible without modern LLMs.

Designing and operating AI agents — orchestration, tool use, observability.

Practicing "vibe coding" — pairing with LLMs to ship real features faster.

Working through Google's AI certification track.