Your real margin is invisible.
Shopify says one thing, Seller Central another, Meta and GA4 a third and fourth. None of them include your actual COGS, shipping, or Amazon fees — so nobody knows which SKU actually makes money.
Know your true profit. Per SKU. Per channel. And own your data.
We build your e-commerce data warehouse in your own Google BigQuery — store, ad spend, Amazon fees and real costs unified, with ROAS, LTV and contribution-margin dashboards.
Built for DTC brands doing $1–20M a year on Shopify or WooCommerce — especially if you also sell on Amazon.
Live in 14 days · Fixed scope, fixed price
Run a performance or ads agency? We also deliver all of this white-label. Agency partnerships ↓
Trusted by
We work in your stack — you own everything.
- BigQuery
- WooCommerce
- Shopify
- Amazon SP-API
- Google Ads
- Meta Ads
- GA4
- Looker Studio
- Klaviyo
- dbt
Three numbers, three different stories
Your reporting is a spreadsheet somebody rebuilds every Monday.
Exports from five tools, pasted together by hand, wrong by the time anyone reads it. Every new question means another afternoon of copy-paste — and the history lives in nobody's file.
Amazon is a black box of fees.
Referral, FBA, storage, returns, lost reimbursements. The settlement report answers none of it per SKU.
The math on getting this done
| Option | Cost | Time to live | You own the data |
|---|---|---|---|
| In-house data engineer | $130k+/year | 3–6 months hiring | Yes |
| Full-service agency | $15–50k/month | months | Rarely |
| SaaS dashboard | $5–9k/year, grows with your GMV | days | No |
| Stotrade Data Warehouse Sprint | Fixed price, quoted upfront | 14 days | Yes — it's your BigQuery |
The Data Warehouse Sprint — everything on this list, nothing billed by the hour
Store pipeline
WooCommerce or Shopify → your BigQuery, real-time via webhooks. No middleware subscriptions — no monthly connector fees, ever.
Ad spend unified
Google Ads + Meta into the same warehouse.
Your real costs
COGS, shipping, ops costs modeled in. This is what makes margin true.
Metrics that matter
Blended & per-channel ROAS, cohort LTV, contribution margin per order and per product.
Three dashboards
Sales Overview, Marketing/ROAS, Costs & Margin. Looker Studio, free forever.
Handover
1-hour walkthrough + documentation. Your project, your data, your access.
Amazon add-on: unified DTC + Amazon P&L per SKU Warehouse Rescue: we finish what your freelancer started
One fixed price, quoted on the intro call and agreed before any work starts — it doesn't change, and there's nothing billed by the hour. If we don't deliver in 14 working days from access handover — full deposit back.
Built and running in production
Not demos. Warehouses that businesses run on every day — one rescued, one built before launch, one at manufacturing scale, one that settles the books with partners.
Paris Cosmetics
WooCommerce · 9 markets · Warehouse RescueAn abandoned warehouse build, finished — and now running a nine-market store
$15M+
annual revenue of the store the warehouse serves
9 countries · one data model
- Situation
- Paris Cosmetics came to us with a half-built BigQuery warehouse left behind by a previous contractor: partial pipelines, no cost model, and no reporting anyone trusted.
- What we built
- We took over the build, finished and hardened the pipelines, and unified orders, ad spend and operating costs in one model — powering ROAS and margin reporting, Power BI semantic models and Google Customer Match audiences.
- Today
- A fully operational, professional data warehouse behind a fragrance store selling in 9 European countries and doing $15M+ a year.
Labify
WooCommerce · from zero · pre-launchA complete data platform built from scratch — before the store even launched
Day 1
warehouse live before the first order came in
9 production reports · still in use today
- Situation
- Labify needed a warehouse ready on launch day, on a tight schedule, with no existing infrastructure to build on.
- What we built
- BigQuery warehouse, real-time WooCommerce ingestion via Cloud Run webhooks (no third-party connector fees) and nine production reports — delivered and tested before the store went live.
- Today
- The store launched on schedule on top of the warehouse, and the same platform still runs their reporting today, growing with the business.
Blachotrapez
Manufacturing · operations BIThe entire operations reporting layer for a $400M+ manufacturer
$400M+
annual revenue of the company running on our reporting
Production · planning · quality
- Situation
- Blachotrapez, one of Poland's largest roofing manufacturers, ran its operations department without a unified reporting area — decisions were made on scattered spreadsheets.
- What we built
- The operations reporting area, end to end: production analytics, planning tools and machine-vision quality systems on top of a single data foundation.
- Today
- The operations department of a $400M+ company works on reporting we designed and built — the same data engineering, applied to factory floors.
Splendid Research
Research · partner settlementsInfrastructure plus a full series of reports for settling with partners
12+
Power BI reports built for monthly partner invoicing
Infrastructure · data model · settlement reports
- Situation
- Splendid Research, a Hamburg-based market research institute, settles with a network of partners every month and needed that invoicing to run from reliable, agreed numbers instead of manual work.
- What we built
- The data infrastructure end to end — source connections, a data model with calculated measures — plus a series of over 12 Power BI reports built specifically for partner settlements.
- Today
- Monthly invoicing runs from the reports, on infrastructure the team owns and can keep extending.
-
★★★★★
“I am savvy with spreadsheets, but Peter is a real wizard. He has helped me create tools that set me apart from my competition. I'd highly recommend Peter's services!”
-
★★★★★
“When I ordered the creation of a dashboard from a database, I was unsure of what to expect, but the result has far exceeded all my expectations. He was incredibly responsive and managed to deliver a high-quality final product in a remarkably swift timeframe.”
-
★★★★★
“He has undoubtedly left a lasting impact on our organization through his brilliant reports, insightful analysis, and unwavering commitment to excellence. I would not hesitate to work with him again.”
Then we become your data team
APIs change 3–4 times a year. Pipelines break quietly. Questions keep coming. That's why the sprint is a starting point, not a handoff: most clients stay with us on a flat monthly partnership — we keep the warehouse running, take on custom requests as they come up, and grow the platform with the business.
We run it
Pipelines, GCP operations, alerting and anomaly watch. APIs change, we fix it before you notice. You never think about the plumbing again.
We build what you need next
Custom requests, on demand: new dashboards, ad-hoc analyses, Amazon fee monitoring and reimbursements, Merchant Center feeds, email deliverability, consent mode — whatever the next question is.
We think with you
A regular strategy call and an AI command center on top of your own data, so the warehouse keeps answering the questions your business asks as it grows.
Flat monthly fee scoped to your needs · 30-day notice · pause anytime.
For performance & ads agencies
Run an agency? We'll be your data team, white-label.
If you run a performance-marketing, paid-media or e-commerce growth agency, we'll build the analytics and infrastructure behind your clients' numbers — to a standard they can't get anywhere else — and you deliver it as your own. Give it to your clients, sell it to them, or build a product line on top of it.
Talk about an agency partnershipYour brand, our engineering
Warehouses, pipelines and dashboards delivered white-label, under your name. Your clients see your agency. We stay in the background and never contact them directly.
Resell it or bundle it
Offer analytics as its own product line, or fold it into your retainers. You set the price and own the relationship; we make sure what you deliver is genuinely best-in-class.
Reporting that wins renewals
Show clients ROAS and contribution margin on their real costs, not platform estimates. When your reporting is the one they trust, the retainer conversation gets a lot easier.
Who you'll actually work with
I'm Piotr Stolarczyk — a data engineer from Kraków, Europe's largest software-outsourcing hub. I've built and run production data platforms for multi-market e-commerce, labs and manufacturing for 8+ years. Every sprint is delivered by me personally, and I stay on as your data partner afterwards: senior engineering at Kraków cost structure is exactly why a fixed-price sprint and a flat monthly partnership work. I'm in Chicago September 13–26 — happy to meet in person.
— Piotr Stolarczyk, Stotrade Data
FAQ
Who owns the data and the infrastructure?
You do. Everything is built in your Google Cloud project, under your billing and access. If we part ways, everything keeps working.
What do you need from us to start?
API access to your store, ad accounts, and a GCP project (we'll guide you through creating one — takes 15 minutes). The 14-day clock starts when access is complete.
What does the warehouse cost to run?
Typically $20–80/month in Google Cloud fees at $1–10M revenue scale. No middleware subscriptions.
What happens after 14 days?
Handover with documentation — it's yours. Most clients continue as a partnership: we run and maintain the warehouse and build whatever they need next. It's optional, and everything keeps working without us.
Booking Chicago meetings now — September 13–26
30 minutes to an hour, no deck, no pressure. Bring your numbers, I'll show you a live warehouse — and tell you honestly whether this is worth it at your scale.
Not in Chicago? Book a 30-min online intro call instead.
Prefer email? piotr@stotradedata.com