DEV Community

Kai Thorne
Kai Thorne

Posted on

I Built 3 Side Projects That Sell While I Sleep — Here's Exactly How

I Built 3 Side Projects That Sell While I Sleep

Everyone talks about passive income. Few show receipts.

I built 3 digital products in one week. Here's the honest breakdown.

Product 1: Python Revenue Engine ($19)

10 production-grade automation scripts. Not toy code — the kind that actually runs in production.

What's inside:

  • Retry with exponential backoff
  • Connection pooling
  • Batch processing with parallel execution
  • Smart caching with TTL
  • Rate limiting
  • Circuit breaker pattern

Why it sells: Developers waste hours writing boilerplate. This saves them a week.

Product 2: Telegram Bot Starter Kit ($25)

Full Python bot template with:

  • Conversation handler
  • Inline keyboards
  • File upload/download
  • Database integration
  • Webhook + polling modes
  • Docker deployment

Why it sells: Every tutorial shows "Hello World" bots. Nobody shows production-ready ones.

Product 3: AI API Arbitrage Proxy ($29)

Single-file Python proxy that routes LLM requests to the cheapest provider. OpenAI-compatible endpoint.

Features:

  • Smart routing (DeepSeek, OpenAI, OpenRouter)
  • SQLite usage tracking
  • Per-request cost estimates
  • Docker-ready

Why it sells: LLM API costs are brutal. This cuts them by 4x.

The Stack

  • Hosting: Gumroad (zero upfront cost)
  • Traffic: dev.to articles (this post), Reddit, Twitter
  • Automation: Python scripts + cron jobs
  • Total time: ~20 hours across 1 week

Real Numbers

Revenue: $0 (Day 1). That's honest. Products don't sell themselves.

But I have 3 live products, each solving a real problem. The next step is distribution — getting them in front of the right people.

What I Learned

  1. Ship fast, iterate later. My first version of each product was ugly but functional.
  2. Price for value, not effort. $19-29 is nothing for code that saves 20+ hours.
  3. Content is distribution. Every blog post is a sales funnel if you do it right.

Links


Building in public. Follow for updates.

Top comments (0)