Sample Project
A showcase project demonstrating my development capabilities.
Software Developer | Ecommerce Systems
Leonidas Michalopoulos
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.
About
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.
The systems matter, but so does how people understand the data they produce.
Read more about me →What I work on
- Data pipelines: syncing platforms, cleaning data, making sure numbers match across systems
- Ecommerce backends: custom Ecommerce infrastructure, order flows, product management
- API integrations: connecting storefronts, payment systems, analytics, and third-party tools
- Analytics infrastructure: GA4, BigQuery, and custom reporting that reflects what's actually happening
Work
Selected projects and case studies.
What Clients Say
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Leonidas rebuilt our order sync pipeline from scratch. Data mismatches dropped to zero and the team finally trusts the numbers they see.
Maria K.
Head of Operations, Fashion Retailer -
He connected our Shopify store to our ERP in weeks, not months. Clean code, clear documentation, and no hand-holding required.
Nikos P.
CTO, Electronics Ecommerce -
Our GA4 and BigQuery setup was a mess. Leonidas restructured everything and now we make decisions based on data we can actually trust.
Sofia D.
Marketing Director, Cosmetics Brand -
Fast, reliable, and communicates well. He understood how our business actually works before writing a single line of code.
Alexandros T.
Founder, Subscription Box Company
Latest posts
- Hello World
My first blog post — an introduction to this site and what to expect.
Contact me
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.