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Semexpert.pl
15+ years of hands-on e-commerce

Technical e-commerce consulting, automation and analytics

We help online stores automate workflows, process product data, implement tracking and connect sales systems.

15+ years in e-commerce Python · APIs · automation PL + EN service
margin-monitor.semexpert.pl
Example data flow
Supplier file CSV / XML Python processing Margin dashboard Streamlit Marketplace feed Allegro / Ceneo

Works with

Shopify WooCommerce IdoSell Baselinker Subiekt Ergonode Allegro Ceneo GA4 n8n Shopify WooCommerce IdoSell Baselinker Subiekt Ergonode Allegro Ceneo GA4 n8n

Services

Six areas where we genuinely help

15+

years in e-commerce

Python

automation & data processing

GA4 + GTM

tracking & Consent Mode v2

API

store, marketplace & supplier integrations

Where this comes from

Over the years I've worked on both the execution and the management side of e-commerce - so I look at projects not just through the tools, but through margins, processes, the team and real impact on sales.

Founder, Semexpert.pl · e-commerce director

Example projects

What we actually build

View projects
Featured project

Real-time price & margin monitoring

PythonpandasStreamlit
avg. margin / month +18%

Allegro API integration

Allegro APIn8n

Purchase vs. sales price dashboard across channels

StreamlitAPI

Consent Mode, GA4, GTM and ad pixels

GA4GTMConsent Mode

Processing brands, EANs, categories and supplier data

PythonCSV/XML

VPS-based scheduled data processing

VPScronPython

How we work

A simple, predictable process

01

Consultation & diagnosis

A conversation about the problem, systems and data. We pin down what can realistically be improved.

02

Technical plan

A concrete scope, tools and order of implementation - no over-engineering, no wasted budget.

03

Implementation

Automation, integrations, tracking or data processing - running in your own environment.

04

Documentation & support

Handover, documentation and care so the solution keeps working without us in the loop.

Positioning

I'm not a do-everything agency

I focus on the technical side of e-commerce - where I have real experience and can be accountable for the result.

I don't do these myself - but I have trusted partners who can take them on when a project needs it.

What I focus on

  • Product data
  • Automation
  • Analytics & tracking
  • Integrations & APIs
  • E-commerce processes

What I don't do

  • Video production
  • Social media
  • Graphic design

With partners

Also need Google Ads, Meta, SEO or UX?

I focus on technical e-commerce - the rest I deliver with trusted partners, with a single point of contact.

Google Ads Meta Ads SEO UX / Figma
See how it works

Got data, tracking or processes to sort out?

Tell us what you're trying to solve. We'll review the case and propose a practical, technical solution.

Book a consultation