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Illia Romanovich

About

Illia Romanovich

Shopify and e-commerce engineer. Five years in e-commerce, the last three on Shopify only, for brands in the US, Canada and Europe.

I work for the storefront's result, not for closing tasks off a list. The best starting point for me is a clearly stated goal and a defined scope. With those I take the project whole, from the commercial logic (subscription models, offers, the funnel) to design and code, implement it precisely, and strengthen it wherever I see an effect on sales. If a finished design exists, I build it one to one. If not, design is part of the work. Once we start, the storefront passes through one pair of hands to a verified release, without a stream of questions back. When a project needs a team, I assemble and lead it. I work directly with US clients in English, without intermediaries.

What you can hand me

  • A task with a clear goal and a defined scope: implemented precisely and strengthened where it improves the result
  • A commercial task as a whole: the subscription model, the offer, the funnel, not only its markup
  • A theme of any complexity: from scratch, a full redesign, or an extension of what exists
  • Subscriptions, bundles, packs, quiz funnels and any custom buy box
  • Funnel tracking through checkout, from GTM and GA4 to custom Web Pixels
  • Speed on real users: Core Web Vitals measured in the field and fixed where they fail
  • A live store with several developers and a content team, delivered without lost content or downtime

How I work

Once the task is agreed, it is mine.
I read the existing code, find the cause, take the work through release and verify it myself. Along the way you get results, not a stream of questions.
I improve the brief, not only deliver it.
Every project is a sales funnel to me. If there is a more effective way to move conversion than the one in the brief, I propose it before the work starts.
New tools only after they prove themselves.
I work with everything that genuinely speeds up delivery today, and keep only what survives a live project. The pipeline I built on Figma MCP and Claude Code eight months ago is one example.
One person, or a team I lead.
Design refinements, asset generation, code, QA and release are all mine. When the scope calls for more people, I hire and run the team. I have done that before.
Estimates without padding.
I never inflate a timeline. If I see a way to shorten the work, I say so before we start, not after.
The result is mine until it is live.
Root cause, fix, verification, deployment without disturbing the content team's work. The complexity stays on my side. What reaches you is a finished release and a short note on what changed.

Selected strengths

Shopify platform

  • Shopify OS 2.0
  • Liquid
  • Sections & blocks
  • Metafields
  • Theme app extensions

Storefront engineering

  • TypeScript
  • Vanilla JavaScript
  • Product forms & variant state
  • AJAX Cart API
  • Sections Rendering API

Performance & measurement

  • Core Web Vitals
  • Real-user monitoring
  • CLS / LCP debugging
  • Web Pixels & analytics boundaries

Commerce & integrations

  • Selling Plans & subscriptions
  • Recharge
  • Search & Discovery
  • Third-party app integration

Craft & delivery

  • Accessibility
  • Merchant configurability
  • Production-safe delivery
  • Maintainable theme systems

Selected engagements

Independent Shopify engineer working directly with brands in the US, Canada and Europe. Three recent production storefronts and one co-founded product, each with a different job to do:

  • Wellness DTC brand

    Sole storefront engineer · June to August 2026

    View case

    A conversion-focused DTC storefront: the subscription offer designed and built on native Selling Plans, funnel tracking through the closed checkout with a custom Web Pixel, and real-user performance work that removed a layout shift PageSpeed never showed.

    • OS 2.0
    • Selling Plans
    • Recharge
    • RUM
  • Absolute Support

    Sole Shopify theme engineer · Q1 2025

    View case

    Dawn extended for a medically complex compression catalog: a custom product-selection and education layer on top of native variant, cart and search behavior.

    • Dawn
    • Search & Discovery
    • Metafields
  • Boxwood Coffee

    Storefront implementation lead · Q2 2025

    View case

    A premium Prestige adaptation for a specialty roaster: retail, subscriptions, two cafes, catering and wholesale in one coherent storefront, with custom code reserved for the coffee data model and navigation.

    • Prestige
    • Metafields
    • Recharge
  • Co-founded product

    Co-founder, product and all development · Launched in 2024, running since

    View case

    A five-language quiz funnel for a consumer subscription product: the offer model, a nineteen-screen engine, server-side sessions, billing, report generation and three analytics layers with deduplication. Launched with partners; the brand and the revenue stay with them.

    • Quiz funnel
    • Subscription paywall
    • Server-side events
    • 5 languages

Absolute commercial figures from client work stay with the brands under NDA. Where the client allowed it, the case shows the relative result; the engineering is shown in full.

Hand over the storefront. Consider it handled.

Send the task and the goal. From there I read the code, take the work through release and verify it myself.