~/portfolio$whoami

Full-Stack();
Developer

Building robust, AI-integrated web apps

Production-quality code with an eye for design — because good software is both functional and beautiful.

2022–Now
Active
84
Tests
90%+
Coverage
4+
Apps Shipped
3+
AI Integrations
profile.png
Agung Cahyo Prasetyo

Quick Overview (30 sec)

Core Strength

Shipping useful products fast

Main Focus

Problem → Build → Validate

Work Style

Pragmatic quality, not vanity engineering

Best Fit

0→1 products, automation-heavy workflows

Team Collaboration

Async-First Communication

I break features into clear scopes, share progress in short written updates, and keep decisions documented so designers, PMs, and engineers stay aligned.

Review-Ready Delivery

I aim for small, reviewable increments with explicit trade-offs and risk notes, making code review faster and team collaboration less friction-heavy.

Engineering Judgement

When To Go Deep

I invest heavier testing on payment flow, auth, and automation logic where regression is expensive.

When To Move Fast

For low-risk UI and exploratory features, I optimize for learning speed first, then harden after usage signals are clear.

Tech Stack Universe

[INITIALIZING_UNIVERSE...]

How to read

Drag the globe to inspect stack depth. Click any node to open short experience notes.

Frontend

5
ReactNext.jsTypeScriptTailwind CSSReact Native

Backend

5
Node.jsPostgreSQLFirebasePrisma ORMRedis

AI & Automation

5
Google GeminiOpenAIn8nLangChainJest

Engineering Journey

// 2022 — present

2022
Start

Self-Taught Foundation

Started coding from zero — HTML, CSS, JavaScript, then React. Spent months on freeCodeCamp, The Odin Project, and building small projects. Realized quickly that building real things teaches faster than any course.

2023
Production

First Shipped Apps

Shipped HPP Calculator (React Native + Firebase) for real F&B entrepreneurs — the first app used by actual paying users. Validated that I could take an idea from concept to App Store without a team.

2024 Q1
SaaS

Full-Stack SaaS Architecture

Built MBTI Compatibility Test as a freemium SaaS — Prisma ORM, PostgreSQL, Redis, Midtrans payments, n8n WhatsApp delivery. First experience designing a complete monetization and data architecture.

2024 Q2
AI

AI Engineering & Automation

Integrated Google Gemini and OpenAI into production apps. Built a WhatsApp AI chatbot with voice note STT, per-user memory, and rate limiting. Started treating AI as an engineering primitive, not a gimmick.

2024 Q3–Now
Quality

Test-Driven, Production-Grade

SkripIn: 84 automated tests, 90%+ coverage, 4-Agent AI workflow, OpenAI TTS, teleprompter. Shifted from "it works" to "it's engineered". Production-quality code with CI/CD, error boundaries, and systematic review.

Proficiency

React / Next.js// Frontend
92%
TypeScript// Frontend
88%
Node.js / API Design// Backend
85%
PostgreSQL / Prisma// Backend
82%
AI Integration// AI
87%
n8n Automation// AI
90%
Testing (Jest)// Quality
85%
React Native// Mobile
78%

Projects

Automation2026Algo Trading

Crypto Radar Trading Bot

Autonomous Pump.fun Signal & Trading Bot

Built to solve one core problem: high-volatility memecoin entries were too slow and emotional. This bot automates signal detection and execution in real time, then protects downside with layered trailing stops and adaptive risk controls.

Cuts response time from manual monitoring to instant event-based execution
Reduces emotional entries with score-based signal validation
Protects capital using adaptive stop logic in fast-changing markets
Runs unattended through Telegram command and monitoring flow
Node.jsSolana Web3.js@pump-fun/pump-sdkTelegrafWebSocketJupiter APIPumpSwap AMMRisk Management
Web Application2025Production

SkripIn

AI Script Generator SaaS

Designed for creators who were stuck between inconsistent script quality and slow turnaround. SkripIn turns rough ideas into ready-to-shoot scripts fast, while preserving each brand voice through a structured multi-agent workflow.

Improves script consistency with a role-based AI pipeline
Shortens production prep using TTS and teleprompter-ready output
Keeps monetization simple with integrated payment flow
Maintains reliability through targeted automated testing
Next.js 16React 19TypeScriptGoogle GeminiOpenAI TTSJestPostgreSQLFirebaseMidtrans
Web Application2025Live

MBTI Compatibility Test

AI-Powered Relationship Analyzer

Built to solve drop-off in relationship quiz products: users wanted deeper insight, not generic scores. This app delivers richer, personalized analysis and converts better with an automated WhatsApp delivery and freemium upsell flow.

Increases perceived value with multi-dimensional compatibility output
Improves conversion with freemium + seamless payment journey
Boosts completion with instant result delivery via WhatsApp
Creates stickier experience through AI-personalized insight
Next.js 16React 19TypeScriptPrisma ORMPostgreSQLZustandRedisMidtransn8n
Automation2024Live

WhatsApp AI Chatbot

Intelligent Customer Service Bot

Created to reduce repetitive customer support workload on WhatsApp. The bot handles common questions, voice notes, and follow-up context automatically so response time stays fast even with high incoming volume.

Cuts repetitive support replies through automated triage
Supports voice-heavy users with built-in STT pipeline
Improves conversation continuity with per-user memory
Keeps system stable with abuse and rate-limit controls
n8nGoogle GeminiWhatsApp Business APIGoogle STTGoogle TTSLangChainGoogle Sheets API
Mobile App2023Shipped

HPP Calculator

Cost Price Calculation — Mobile App

Built for F&B owners who priced products by guesswork and lost margin. The app standardizes HPP calculation, gives recommended selling prices, and keeps costing available even when internet is unstable.

Reduces pricing guesswork with recipe-level cost visibility
Improves margin control through automatic HPP and markup analysis
Works reliably during service with offline-first architecture
Designed specifically for real-world F&B workflow
React NativeFirebase AuthFirestoreFirebase Storage

Need a developer?

Share the scope first. I'll turn it into a practical build plan.