About · Daniil Maximkin · Valencia, Spain · CET
I build software for concrete business tasks. Ecommerce tracking is where I have done it longest.
I am Daniil Maximkin, a product engineer and founder: I build applications, integrations and AI systems for concrete business tasks. One person, no agency — you talk to me and I do the work.
The deepest part of that work is ecommerce measurement. I work across Shopify development, tracking and analytics, and AI-assisted automation. Tracking is checked against real orders; apps and workflows are tested against the acceptance criteria agreed in the quote.
Facts you can check yourself.
Checked September 30, 2026Years in ecommerce tracking
10
Since my first tracking contract in July 2016
These figures come from my Upwork profile, checked on the date above. I only publish methods I use in client work and no invented numbers; if a statement cannot be verified, it is rewritten without it. Corrections are dated — editorial policy
How I work.
A clear task can go straight to a fixed-scope quote. When the cause is unclear, a separate read-only diagnosis establishes what needs fixing.
A platform figure is a claim until it is matched to an order. I write down which is which.
Changes are built in a separate workspace, checked against the agreed criteria and released with a documented rollback. Tracking changes also require a real test order.
A project ends when the result is checkable — for tracking, a reconciliation of events against your orders that you can read yourself.
Products I build
Fixel Pixel — a Shopify tracking app I founded, build and run (fixelpixel.app).
DeploTeka — a platform I built for running one dedicated Shopify app per store. In production since July 2026 for my own product, Fixel Pixel, across about 100 stores.
When Fixel Pixel is relevant to client work, I say that I own it and compare it with alternatives such as Stape or a self-hosted Google Cloud setup.
Where to find me
Working languages: English and Russian.
What I work with.
Building software
- Shopify apps, theme features, shipping rules and store integrations
- AI-assisted request processing, Telegram assistants and business workflow automation
Ecommerce measurement
- GA4 ecommerce tracking and event architecture — purchase events, item arrays, revenue, tax and shipping accuracy, refunds
- Google Tag Manager, client-side and server-side
- Server-side tracking infrastructure — Stape, self-hosted Google Cloud Platform, or Fixel Pixel
- Meta Conversions API and event deduplication
- Google Ads conversion tracking and enhanced conversions
- Offline conversion tracking — feeding CRM and phone sales back into ad platforms
- Consent Mode v2 and consent-aware tagging
- Full tracking audits and order-level reconciliation
Platforms and stack
- GA4
- Google Tag Manager
- Google Ads
- Meta Business Suite and Events Manager
- TikTok Ads
- Pinterest Ads
- Shopify and Shopify Plus (including checkout extensibility)
- Stape
- Google Cloud Platform
- BigQuery
- Fixel Pixel
Beyond tracking.
Tracking is the longest-running part of my work, not the whole job. I also build integrations, custom apps and automation when the task is concrete: two systems that should exchange data and do not, a workflow that still runs through spreadsheets, an internal tool that does not exist yet.
Tell me what you need to build, connect or fix.
I reply personally, in writing, within one working day.