Josef Smetanka

Building tools for multichannel sellers. Founder of GNIZDO — early access sync layer for inventory, prices & orders across WooCommerce, Etsy, eBay & Shopify.

Social Links

Articles

Insights from building GNIZDO — practical notes on e-commerce, sync logic, and tooling.

Why sellers collapse when they add one more marketplace — and how to survive itmedium.com
Why Manual Inventory Control Stops Working After Your First 100 SKUsmedium.com

Products

Things I build — small tools, prototypes, and my main project GNIZDO

Gnizdo
A simple tool that keeps my WooCommerce, Etsy, eBay, and Shopify stock, prices, and orders in sync. Sync checks across WooCommerce, Etsy, eBay & ShopifyDaily automated discrepancy alerts Prevent oversells & price drift
In development, 2025 — presentpre-launch

Recent activity

Your system is “up” but users think it’s broken — a real pattern I keep seeing

A pattern I keep seeing in eCommerce systems

Validating via services before building a $27k MRR product

You don't have a marketing problem, you have a landing page problem

Most Early-Stage Startups Don’t Need Marketing — They Need Feedback

The Evolution of E-Commerce: How Online Shopping Is Redefining Modern Business

How Andero Avastu Is Building A SaaS Business While Freelancing

Getting an multi-million-dollar foothold in a crowded market

Why am I developing Inventory Management Software?

10 Must-Have Features On Every eCommerce Website, Shop & Business Should Have in 2025 - 2026

How Web Scraping Is Used for Extracting Product Data from E-Commerce Websites?

8 Best Practices for Efficient Ecommerce Inventory Management

Validating via services before building a $27k MRR product

Most SaaS Founders React Wrong When Sales won't increase, Here’s What Works

Josef Smetanka

Gnizdo