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johnlester-0369/README.md

John Lester

AI Agent Engineer · Full-Stack TypeScript · Bot Automation

Started coding at 14 through curiosity. Building production systems at 19 through discipline. I focus on shipping things that work, are documented clearly, and solve a real problem.

What I Build

AI Agents: Conversational systems with structured memory, context engineering, and tool use. Not wrappers around an API — systems that know when to act, what to remember, and stay predictable in production.

Multi-Platform Bot Frameworks: Unified automation across Discord, Telegram, Facebook Messenger, and Facebook Page from a single codebase and dashboard. Four platforms. One command file. One place to manage everything.

Full-Stack Web + Mobile Applications: React, Next.js, and Expo frontends on Express APIs, backed by MongoDB or PostgreSQL (NeonDB, Drizzle ORM, Prisma). Web and mobile from one codebase, with authentication, real-time communication, and deployment handled cleanly.

Browser Automation & Developer Tooling: Deterministic workflow automation, data extraction, and scheduled processing. Traditional and AI-augmented depending on what the problem actually needs.

Selected Work

Project What it solves Live
SimpleCash Personal finance tracker with a transactional audit log simplecash-demo.onrender.com
assistly LangGraph ReAct agent with memory compaction, scenario-aware prompting, and structured lead capture for small businesses —
SimpleStockV2 Inventory SaaS rebuilt on PostgreSQL + Drizzle ORM, with race-condition-safe stock updates and an append-only transaction ledger simplestockv2-demo.onrender.com
SimpleStock Inventory management SaaS with auth, analytics, and dual data-source switching simplestock-demo.onrender.com
Cat-Bot Unified 4-platform bot framework — Discord, Telegram, Messenger, Facebook Page — managed from one React dashboard, with swappable databases (Prisma/SQLite, MongoDB, NeonDB) cat-bot-n64t.onrender.com
real-time-chat Real-time chat across web, iOS, and Android from a single Node.js server real-time-chat-johnlester-0369.onrender.com

Tech Stack: TypeScript · Node.js · React · Next.js · Expo · Express · Tailwind CSS · LangGraph · Socket.IO · MongoDB · PostgreSQL (NeonDB) · Drizzle ORM · Prisma · Docker

Pinned Loading

  1. SimpleCash SimpleCash Public

    SimpleCash is a personal money-runway tracker. It answers that question live: current balance, savings rate or runway countdown, and a weekly Spend vs Save breakdown, computed fresh on every reques…

    TypeScript

  2. Cat-Bot Cat-Bot Public

    A unified multi-platform, multi-instance chatbot framework for Discord, Telegram, Facebook Page, and Facebook Messenger, managed from a single dashboard.

    TypeScript 7 10

  3. assistly assistly Public

    Production-grade AI café assistant, Express + LangGraph ReAct agent with scenario-aware prompt assembly, memory compaction, and a structured lead-capture reservation workflow. Powered by DeepSeek, …

    TypeScript 2

  4. github-readme-scraper github-readme-scraper Public

    Download every README.md from any GitHub user's repositories — including nested READMEs inside monorepos — with a single command.

    JavaScript 1

  5. AutoWiki AutoWiki Public

    AutoWiki is a zero-config Node.js bot that polls Wikipedia's recentchanges API every 5 minutes.

    JavaScript

  6. smart-file-organizer smart-file-organizer Public

    Your Downloads folder, sorted automatically — the moment each file lands.

    JavaScript