Leonidas Michalopoulos | Ecommerce backend developer and systems engineer

I build the systems ecommerce businesses run on.

Backend infrastructure, data pipelines, and integrations designed around how your business actually operates, not how a generic platform assumes it does.

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About me

The systems matter, but so does how people understand the data they produce.

Over the past few years, I've worked with brands that outgrew generic solutions and needed systems built around how they actually operate.

I start by mapping how data flows, from storefront to payments to analytics, and identifying where things break. From there, I design backends and pipelines that bring everything into one clear, reliable system.

Services

What I work on

Ecommerce

Custom WooCommerce/Django commerce, checkout/order flows, product/catalog logic, B2B/B2C

APIs

ERP, CRM, payments, couriers, marketplaces, accounting systems.

Data Analytics

ETL/data pipelines, dashboards, product/order/customer data, reporting.

AI

Operational workflows, AI assistants, data processing, repetitive back-office tasks.

Projects

Selected projects and case studies.

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Reviews

What Clients Say

Working with Leonidas completely changed how we approach our systems and data. He doesn't just build features — he understands the problem at its core and designs solutions that actually make sense long-term.

Leonidas handled the web scraping project exactly as we needed delivering clean, accurate data without any issues. The whole process was fast, clear, and reliable.

Leonidas built a fully custom B2B platform on top of WooCommerce that fits our business exactly. It's not just a store, it's a system tailored to how we operate.

Leonidas handled my entire SEO analysis from start to finish, from planning to full technical implementation. The difference was clear within a short time.

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me

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I take on a small number of ecommerce projects each year. If you need better data infrastructure, a reliable ecommerce system, or clarity in your analytics, I'd be glad to hear about it.