MENU

// Founder · engineer · Dubai · UTC+4

Tomasz Sadowski

I build products, teams, startups and occasionally cool stuff. I co-founded one of the UK’s first student hackathons, built Opinew on a shoestring (plus one small angel round) until Shop Circle bought it, and now run ShopTest.ai (opens in a new tab), which tests Shopify checkouts so you don’t have to.

Programs Open a channel

// Selected programs

Programs

Two companies, one hackathon that outlived my student card, and a T-shirt side quest.

  • Live PRODUCTCARTCHECKOUTORDERMONITORINGSHOPIFYCHECKOUTS · JOURNEYS · AI TEST GENERATION

    PRG.01 Co-founder · CEO & CTO

    ShopTest.ai (opens in a new tab)

    Watches Shopify checkouts and customer journeys around the clock, and uses AI to write the tests. Built because a broken checkout once cost a client $10,000 overnight.

    • Live since May 2026
    • Shopify
  • Acquired 4.7620 REVIEWS · SHOPIFY APP STOREOPINEWEST. 2015

    PRG.02 Founder · 2015–2024

    Opinew

    A Shopify reviews app that grew from a final-year uni project into a mostly bootstrapped company, acquired by Shop Circle in 2022. Merchants still rate it 4.7★ across 620+ reviews.

    • Scottish EDGE winner 2019
    • $25M+ in sales converted
  • Still running The 2016 GUTS hackathon in the Hunter Halls, University of Glasgow.

    PRG.03 Co-founder · first president

    GUTS hackathon (opens in a new tab)

    One of the UK’s first student hackathons, first run in Nov 2013. Now “Do You Have The GUTS?”: 300+ attendees in 2025, and nobody has turned the lights off yet.

    • Since 2013
    • Best New Society
  • Beta PLACEHOLDER · ART PENDING YOU

    PRG.04 Custom T-shirts

    Custom T-shirt maker: make yours

    An 8-bit Polish hussar jumps with a padel racket. Upload a face photo, the hussar gets your face, order the shirt.

    • 8-bit Polish hussar
    • Padel racket
    • UAE delivery

// About · service record

Record

The short version, with timestamps and minimal adjectives.

> whoami

I’m Tomasz. Studied software engineering in Glasgow, co-founded the uni’s tech society and one of the UK’s first student hackathons. My final-year project became Opinew; I built it on a shoestring (plus one small angel round) and sold it to Shop Circle in 2022.

What I got out of it: freedom. No boss, padel at noon, side projects from good cafés. I’m now officially unemployable.

Currently building ShopTest.ai from Dubai, for fun. People ask when my next holiday is. My life is a holiday. With a side quest for purpose, which sounds cheesier than it is.

  • BaseDubai
  • FocusShopify
  • StatusUnemployable
  • NowShopTest.ai
SYS.RECORD // TOMASZ.SADOWSKI 6 save points
  1. Uni in Glasgow Software engineering degree. Picked up a hackathon habit.
    • Best New Society in its first year. I was its first president.
    • Still going as “Do You Have The GUTS?”: 300+ attendees in 2025.
    • 4.7★ from 620+ merchant reviews on the Shopify App Store.
    • Scottish EDGE winner, 2019.
    • One small angel round in 2021 to push marketing. Never got anywhere near a Series A.
    • Full story →
  4. Sold it to Shop Circle Stayed two more years as General Manager, then handed over the keys.
  5. Became unemployable Left in July. No boss since. Padel at noon.
    • Built because a broken checkout once cost a client $10,000 overnight.
    • Co-founder, CEO and CTO. The meetings are short.
Tomasz in profile, in a dark suit with glowing orange circuit lines, looking out over a glowing cyan digital landscape with a tall light-beam spire under a stormy sky.

// USER.PROFILE · TOMASZ.SADOWSKI

Engineer by training. Founder by habit.

Currently building ShopTest.ai from Dubai, mostly indoors.

// Off-duty processes

Interests

What runs in the background when the laptop is closed.

  • PROC.01 · Primary

    Padel

    About 7–8 hours a week. The knees have filed a complaint; it is under review.

    Put your face on a padel hussar →

  • PROC.02

    Gym & weightlifting

    Lift heavy things, put them back down, repeat.

  • PROC.03

    Hiking

    Mostly UAE mountains with a group now, plus the odd desert. Before that, the Scottish Highlands: rain from below, midges eat first.

  • PROC.04

    Board games

    Strategy, but with cardboard and fewer stakeholders.

// Comms · consulting

Open a channel

Available for consulting: products, teams and startups from 0 to 1, e-commerce and Shopify, AI products, and telling good startups from good decks. Type message below, or book for 15 minutes.

Type a command, or just talk to me. lists the rest.

tap a command

Aperture clear?

Your message is about to leave the building.