Live
XOXONA
Consumer AI product, Thai-first. I built the first version myself, pitched it, and got it greenlit. I own the retrieval and knowledge system and share product direction. Agent-directed development, on purpose.
§ 01
About me
The short version.
Fig. 01The operator
I'm a software engineer in Bangkok. Specialize in: backend, AI, agent workflow orchestration, and the layer where a product's promises meet its data.
The through-line of my career is the same skill applied further up each time. I built a quest engine by hand, then owned architecture and incident triage across a 70+ module codebase, and now I direct agents to ship a live consumer AI product — specifying and reviewing far more than I type. Each step needed the same thing: knowing what good looks like before it exists.
I've also watched two markets disappear underneath a product I was building, and rebuilt through both. That's taught me more about engineering judgment than any green-field project has.
I like simple things that hold up. I'd rather delete a system than defend it.
“Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.”
— Antoine de Saint-Exupéry
- Years shippingsince 2019
- 07
- Production products
- 03
- Public repos
- 10
- Players servedRadiant
- 100k+
§ 02
Skills
Grouped by what it's for, not by logo count. Everything here is something I've shipped with.
AI & retrieval
- Claude
- Gemini
- OpenAI
- LangChain
- LangGraph
- LangSmith
- MCP
- Vercel AI SDK
- RAG / retrieval
- Agent tooling
- Claude Agent Skills
- Embedding
Languages
- TypeScript
- JavaScript
- Python
- SQL
Backend
- Node.js
- NestJS
- Express
- Hono
- tRPC
- gRPC
- TypeORM
- Drizzle
Orchestration
- Temporal.io
- RabbitMQ
- BullMQ
- Socket.IO
Data
- PostgreSQL
- MongoDB
- Redis
- Neo4j
- Typesense
- Pandas
Frontend
- Next.js
- React 19
- Tailwind v4
- shadcn/ui
- TanStack Query
Infra & ops
- Docker
- Kubernetes (GKE)
- Turborepo
- GitHub Actions
- Datadog
- OpenTelemetry
- PostHog
Practice
- System design
- Database design
- Incident triage
- BA / SA
§ 03
Work experience
Grouped by company, newest first. Three companies, four roles, 2019 to now.
Fig. 03.1Zentry
2021 — now
Zentry
Cryptomind Group · Bangkok
CurrentXOXONA — product + AI engineer
2026 —A live consumer AI product. I'm the lead engineer, which means I shape features with product rather than receiving them. I built the knowledge system that decides which long-form lore a character needs for the current turn, against an unbounded history and a fixed context budget. It's also the one codebase I've built agent-directed on purpose — I specify, architect and review far more than I type, and every decision in it is one I can defend.
xoxona.ai ↗Radiant / GuildFi — software engineer
2021 — 2026Four and a half years in one large, long-lived, multi-team codebase — 70+ backend modules, five apps, a platform that served 100k+ players. I was sole owner of the quest engine from its first line through a full rebuild onto durable workflows: partial progress, streak repair, rerolls, buff modifiers. I drove the technical pivot from a Web3 scholarship platform to a real-time PC gaming product when the market for the first one collapsed, normalised event streams from five game titles into one engine, and spent a lot of nights debugging systems I hadn't written.
zentry-data — retrieval & pipelines
2025 — 2026News search and indexing, and the retrieval layer a deep-research agent queried through. Second-largest contributor on a small team.
Fig. 03.2BlockFint
2020 — 2021
BlockFint
Core banking · Bangkok
Software engineer — BA / SA / dev / QA
2020 — 2021Core banking — savings, lending, and certificates of deposit — for enterprise bank clients. The team was small enough that you gathered the requirements, analysed them, built the thing and tested it yourself, which is where I learned to write a spec I'd be willing to implement. I led three engineers delivering a regulation-driven interest and billing system in two months, and mentored two juniors through it. Regulation is a good teacher: the requirements aren't negotiable and the arithmetic has to be right.
Front-end developer — part time
early 2020React and React Native work on client projects while finishing my degree. How I got in the door.
Fig. 03.3Phatra
2019 — 2020
Phatra
Asset management · Bangkok
Data engineer — part time
2019 — 2020ETL and automation in the research department, supporting the investment team. Scraping and transforming market and alternative data into databases and Tableau — including a pipeline tracking Thai dam water levels, which is a genuinely useful signal if you trade agriculture. My first job, and where I learned that real data arrives broken.
§ 04
Work projects
Three private codebases, kept short on purpose — the detail is interview material, not website copy.
2021 — 2026
Radiant / GuildFi
Real-time PC gaming engagement platform, 100k+ players. Sole owner of the quest engine through a full rebuild onto durable workflows.
2025 — 2026
zentry-data
News search, indexing, and the retrieval layer behind a deep-research agent.
Fig. 04.1Shipped for clients
Freelance and client work, shown as a row rather than cards — they’re breadth, not depth.
§ 05
Personal projects
Public, solo, hand-built. Every employer codebase above is private, so this is the only place you can read the actual code.
Craft
florify
Plant, water and harvest 405 tree species across three rarity tiers, on a water-drop economy with daily missions, streaks and combos. Bilingual Thai and English down to the per-species lore, and installable as a PWA. The species art is not hand-drawn — a generation pipeline in the monorepo produces it.
Craft
wenfang-chinese-toolbox
I'm learning Chinese and wanted flashcards and stroke-order lookup that worked the way I study, so I made my own and kept using it. Bilingual Thai and English throughout: Astro static output on Cloudflare Pages, strict TypeScript, and a CI check that fails the build when the two locales fall out of parity.
Agent tooling
thai-personal-finance-planner
Models Thai tax filing, SSF/RMF/Thai ESG allowances, and social security tiers, then runs a seven-round interview and emits an HTML dashboard. Bilingual, MIT licensed.
Craft
chutas-bakery
My mother's bakery. Menu and story pages with the copy authored in MDX rather than hard-coded, so the words are data and the components stay dumb. Next.js App Router on Cloudflare, sitemap and robots generated at build.
Agent tooling
riko-chrome-companion
A draggable anime companion you chat with across tabs, on OpenAI, Anthropic, or Gemini. Manifest V3, Shadow DOM isolation so no page can style it, emotional sprite states, and a social-detox nudge.
§ 06
Off the clock
Four things I do that aren't engineering.
01
Wing chun
Practitioner. Close-range, economy of motion, and a strong opinion about doing less.
02
Rock climbing
On the wall most weeks. Reading a problem before touching it is the same skill as reading a system.
03
Photography
Film emulation is a hobby that turned into a codebase — see philm.
04
Design
This site is mine, top to bottom.