Shopify development
Custom shipping and discount rules, checkout extensions, apps and store integrations.
Task for Daniel — the engineering practice of Daniil Maximkin
Build, fix or connect your systems — with the engineer who does the work.
Shopify development, tracking & analytics, integrations and AI automation. Describe your task in your own words: I read every request myself and reply within one working day. The first answer is free.
Daniil Maximkin
Product & solutions engineer · Valencia
- 10 years in ecommerce tracking
- 490+ Upwork jobs
- 4.9★ across 350+ ratings
- 100% Job Success · Top Rated
- Founder of Fixel Pixel
“He’s probably the best freelancer I’ve worked with. He’s super responsive, incredibly knowledgeable, and always finds a solution to every problem.”
Upwork Top Rated4.9★100% Job Success490+ Upwork jobs10 years in ecommerce tracking
What people bring here
Tracking & analytics
GA4, Meta or Google Ads that don’t match your orders; server-side tracking you own.
AI Agents & Automation
AI assistants, API integrations, bots and coding-agent pipelines with checks and a human review step.
Systems
Quotes, production, stock and billing. A business stack your team can operate and recover.
Recent work
What changed after the work was done
Client work, anonymised. Before-and-after figures from each case; the date and method are on the case page.
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Automotive repair · United States
6% to 76%
of sales traceable to their source
Duplicate purchases +100% to 0%
Rebuilt purchase tracking for a headless Shopify store before Shopify’s deadline.
Read the case: 16 Days Before Shopify's Deadline: Rebuilding Measurement for a Headless Store -
Jewellery DTC · United Kingdom
3.4 s to 1.2 s
mobile product page load (LCP)
Removed a speed score faked for the benchmark and made the real store fast.
Read the case: The 97 That Was a Lie -
Premium fashion (DTC)
37 of 37 orders
reach Meta exactly once, with the right amount and currency
Reconciled Triple Whale, Meta and Google for a store selling in 9 currencies.
Read the case: Three Tools, Three Answers: Reconciling Triple Whale, Meta and Google for a Multi-Currency Store
How it starts
From your first message to a working result
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You describe the task
A few sentences, in your own words. No brief, no mandatory call.
a few minutes -
I reply personally
Whether you can fix it yourself (with a guide), or which option fits and what it costs. Optional D.AI help does not replace my reply.
within one working day · free -
Scope and a fixed price
What is included, how the result will be checked and what it costs — agreed in writing.
before any paid work -
Build, verify, hand over
The work, the evidence that it works, and handover notes that stay with you.
on the agreed scope
Prices
Prices, before you ask
A clear task can go straight to a fixed quote. When the cause is unclear, diagnosis is optional.
These are different kinds of work, not four stages to buy in order. A paid quote names the scope, the fixed price and how the result will be checked.
Price list
- Discuss the taskFreeI read your task and reply: whether you can fix it yourself, or what it takes.
- Focused Fixfrom USD 450One bounded implementation or fix, quoted before it starts.
- Custom Engineering Projectfrom USD 1,500Apps, integrations, automations and complex migrations.
- Technical PartnershipUSD 1,000 / month8 engineering hours a month in an agreed area, one active task at a time.
Not sure where it breaks? A read-only Tracking Health Check is USD 395 — optional, never a required first step.
Full price catalogueClients say
In clients’ own words
The Upwork tallyTop Rated
- years in ecommerce tracking
- 10
- Upwork jobs
- 490+
- client rating
- 4.9★
- Job Success
- 100%
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5.0 out of 5
He continually checked in on how the conversion tracking was going days and even weeks after the project ended.
Brandon L., Function Fix Google Ads offline conversions · 2026 · on Upwork -
5.0 out of 5
Very responsive, professional, and REALLY knows his stuff. I had an issue with meta ads attribution and [he] did a great job fixing it!
Oliver H. Meta attribution debugging · 2026 · on Upwork -
5.0 out of 5
He went beyond the agreed work and supported me with additional items to ensure delivery was more outcome oriented rather than just what we had agreed.
Gagan M. Shopify store development · 2025 · on Upwork
The practical library
Working it out yourself?
Start with a guide or a self-check. If you get stuck, bring me what you found.
Explore all guides-
Start with this guide
Why GA4 Revenue Doesn't Match Shopify Orders
Why GA4 and Shopify revenue can differ, how I check the cause order by order, and one fully reconciled hypothetical month.
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Tools & self-checks
Free self-checks: tracking symptom checklist, ad-leak estimator
Hi, I’m Daniil.
I work with you from defining the problem to implementation and handover. You talk to the person who does the work. I work in English and Russian; written correspondence in Spanish with translation support.
What do you need to get working?
Describe your taskThe first answer is free, within one working day. Or write directly: next@taskfordaniel.com
Talk to Daniil
A free 15-minute call to discuss your task. In English or Russian; in writing, also in Spanish with translation support.
The invitation will arrive by email.