Bannawat Rattanarak

01. About

Hey, I'm Bannawat — a 21-year-old CS student in Thailand. I'm a full-stack developer who leans hard on the backend: APIs, servers, data flow, and the automation that keeps it all running.

I like the hard parts — a Go e-commerce API, a real-time DevOps bot that streams GitHub webhooks to Discord, an npm package that auto-heals failing API calls with an LLM. I care about services that stay up under load and fail gracefully when they don't.

The other half of me makes games. I designed and built Silent Ember, a horror game in Unity — from the core loop and mechanics to the systems behind it. TypeScript and Golang are my go-to tools; I reach for Python, C#, Unity, or Godot when the job calls for it.

02. Experience

2024 — Present
2024 — Present
Backend & Full-Stack
Full-Stack Developer
I build systems back-to-front with a backend focus — REST APIs, real-time pipelines, auth, and DevOps automation. Golang when performance and reliability matter, TypeScript across the stack. My work includes a Go e-commerce API, a webhook-driven bot, and a published npm library.
- TypeScript
- Go
- JavaScript
- HTML & CSS
- Python
2022 — 2024
2022 — 2024
Game Development
Game Developer
I design and build games in Unity and Godot — core loops, mechanics, and the systems that hold everything together. Silent Ember, a horror game I built solo, is where I mix engineering with creative design.
- Unity
- Godot

See everything on GitHub →

03. Skills

Core Stack

TypeScript Golang

Golang

JavaScript Python

Python

Frontend

TypeScript

JavaScript Figma

Figma

Backend

Golang

Node.js

PostgreSQL Docker

Docker

Game Dev

Unity

Godot

Tooling

Git

Docker

Figma

Mindset

PerformanceClean CodeGame Feel

04. Projects

Silent Ember

In Development

A horror game I designed and built — explore the house, uncover memories, and survive what lurks in the dark.

Playable build coming soon

Main Menu

RepoRadarLive System

Real-time DevOps bot — GitHub webhooks → a Fastify API (HMAC verify, idempotency) → n8n → rich Discord embeds. Fault-tolerant, at-least-once delivery.

GitHubAPIn8nDiscordTypeScript

Live Activity Feed…

ai-fetch-healernpm package · v1.1.0

Runtime API auto-healing wrapper around fetch — catches 400/422 schema mismatches, asks an LLM (Gemini, OpenRouter, Groq, Ollama) to generate a healing rule, patches the payload, and retries automatically.

RequestAIApplyRetrynpm install ai-fetch-healer

Healing Run — simulateddemo

1Request fails422{ "user_name": "Ada" }

Privacy-by-design
Masks email, password, token & other PII before any payload reaches the LLM.
Heuristic cache
O(1) lookup, capacity 1000 — repeat error patterns skip the LLM call entirely.
Never throws
Healing failure always falls back to the original response — caller never breaks.
Production-tested
Caught a deprecated default model (404) in prod, shipped the fix as v1.1.0 same day — 44/44 tests green.