TL;DR — This guide walks you through building a portfolio side project that combines a real-time WebSocket feed, a Telegram bot, Supabase backend, Stripe payments, and a dynamic programming leaderboard. You’ll end up with a runnable system that demonstrates full-stack, real-time, and payment integration skills that hiring managers notice.

In a crowded engineering market, a static PDF resume rarely conveys the depth of your systems knowledge. By shipping a live, full‑stack application you can demonstrate real‑time communication, backend scalability, payment integration, and algorithmic problem solving—all in a single, demonstrable artifact. This post walks you through building a portfolio side project that weaves together websockets, telegram, supabase, stripe, a triangle dp challenge, a top500 leaderboard, modular subagents, and the reactloopll library, giving you a concrete story to tell in interviews.

Why This Project Stands Out on a CV

  • Real‑time systems – WebSocket server and client showcase event‑driven architecture.
  • Full‑stack proficiency – React frontend, Node/Express backend, and PostgreSQL via Supabase.
  • Third‑party integration – Stripe payments and Telegram Bot API demonstrate external service orchestration.
  • Algorithmic depth – A triangle dp (dynamic programming) challenge with a top500 leaderboard proves problem‑solving skill.
  • Modular design – subagents illustrate separation of concerns and reusable components.
  • Modern state management – reactloopll highlights familiarity with contemporary React patterns.
  • Zero to one mindset – The project follows the “zero to one” philosophy of building something unique that can scale.

Architecture Overview

The system is composed of five loosely coupled components:

  1. Frontend – A React single‑page app built with reactloopll for declarative data loops.
  2. API Server – Node.js/Express REST and WebSocket endpoints.
  3. Real‑time Layer – A WebSocket server pushes leaderboard updates and bot notifications.
  4. Persistence – Supabase (PostgreSQL) stores users, submissions, and payment records.
  5. Integrations – Stripe for payments, Telegram Bot for messaging, and a set of subagents for background tasks.
Browser (React) <--> WebSocket <--> API Server
API Server <--> Supabase
API Server <--> Stripe
API Server <--> Telegram Bot
API Server <--> Subagents (e.g., DP solver, notification)

Each component can be developed and tested independently, then wired together via well‑defined interfaces.

Building It Step by Step

1. Scaffold the Project

mkdir portfolio-cv && cd portfolio-cv
npm init -y
npm install express ws supabase stripe telegram-bot-api react reactloopll