09/08/2026 updated
100 % available
Senior Shopify Developer | Senior Software Engineer | Shopify Plus, Custom Apps & CRO
Kyiv, Ukraine
Only remote
MEng, Mechanical Engineering — NTUU Kyiv Polytechnic Institute, 2020–2021 (BSc 2016–2020)About me
I help Shopify merchants build custom apps, complex buying journeys, and faster storefronts. My experience combines enterprise Shopify Plus delivery, technical leadership, and CRO backed by measured project results.
JavaScriptA/B TestingCode ReviewContinuous DeliveryContinuous IntegrationConversion Rate OptimizationGoogle AnalyticsPostgreSQLNode.jsShopifyTypeScriptWeb Performance OptimizationGoogle Tag ManagerReact.jsCloudflare
Shopify Platform Engineering
Expertise in Shopify Plus, Liquid, Online Store 2.0, Shopify Functions, Checkout UI Extensions, Theme App Extensions, App Proxy, Admin & Storefront GraphQL, Metafields & Metaobjects, Shopify Flow, Shopify Markets, Customer Events / Web Pixels, Shopify CLI, Polaris, and App Bridge. Proven track record delivering enterprise multi-brand storefronts across 15+ markets and 8 languages.
Frontend Development with React & TypeScript
Strong command of TypeScript, JavaScript (ES2023), React, React Router / Remix, Next.js, Preact, Node.js, NestJS, Koa, GraphQL, REST, HTML5, CSS3, Sass, Tailwind, Alpine.js, and Vue.js. Applied in building performant, scalable commerce frontends including multi-tenant embedded Shopify apps.
Solution Architecture & Engineering Practice
Hands-on experience with solution architecture, ADRs and C4 modelling, API design, Magento-to-Shopify migration, ERP/PIM/CMS/search integration, Vitest, Playwright, visual regression, Sentry, Snyk, SonarQube, Core Web Vitals, GDPR and consent, accessibility, code review, and mentoring.
Data & Infrastructure
Practical experience with PostgreSQL, Prisma, Firebase, Docker, Azure (Service Bus, Functions, DevOps), Cloudflare Workers/Pages/D1, Vite, Webpack, and CI/CD pipelines.
Commerce Stack & Integrations
Working knowledge of Klaviyo, Judge.me, Gorgias, Klarna, TWINT, MyParcel, A/B Tasty, Dynamic Yield, and Convert. Experience integrating PIM (inRiver, Algolia), DatoCMS, ERP (iScala, Dynamics 365), and Azure Service Bus/Functions.
AI & Agentic Engineering
Building custom agent workflows and skills using Claude Code and Codex; MCP integration and self-hosted servers; context engineering and schema-validated knowledge systems; LLM-assisted review and test generation.
Analytics & Tag Management
Experience with Google Tag Manager, GA4, dataLayer, checkout pixel, store pixels, and vendor-app behaviour tracking. Audited and restructured GTM template estates across EMEA services for enterprise clients.
Team Leadership & Delivery
Led and coached teams of 5–7 developers including mentorship, growth planning, A/B testing coordination, documentation, runbooks, and delivery status reporting. Migration frontend lead on a Magento 2 to Shopify replatform for a multi-brand regulated-retail group.
Conversion Rate Optimisation
Delivered CRO-focused rebuilds measured against order data, including PDP conversion rebuilds, paid-upgrade attach rate improvements, and revenue-per-session uplifts across multiple Shopify merchants.
Expertise in Shopify Plus, Liquid, Online Store 2.0, Shopify Functions, Checkout UI Extensions, Theme App Extensions, App Proxy, Admin & Storefront GraphQL, Metafields & Metaobjects, Shopify Flow, Shopify Markets, Customer Events / Web Pixels, Shopify CLI, Polaris, and App Bridge. Proven track record delivering enterprise multi-brand storefronts across 15+ markets and 8 languages.
Frontend Development with React & TypeScript
Strong command of TypeScript, JavaScript (ES2023), React, React Router / Remix, Next.js, Preact, Node.js, NestJS, Koa, GraphQL, REST, HTML5, CSS3, Sass, Tailwind, Alpine.js, and Vue.js. Applied in building performant, scalable commerce frontends including multi-tenant embedded Shopify apps.
Solution Architecture & Engineering Practice
Hands-on experience with solution architecture, ADRs and C4 modelling, API design, Magento-to-Shopify migration, ERP/PIM/CMS/search integration, Vitest, Playwright, visual regression, Sentry, Snyk, SonarQube, Core Web Vitals, GDPR and consent, accessibility, code review, and mentoring.
Data & Infrastructure
Practical experience with PostgreSQL, Prisma, Firebase, Docker, Azure (Service Bus, Functions, DevOps), Cloudflare Workers/Pages/D1, Vite, Webpack, and CI/CD pipelines.
Commerce Stack & Integrations
Working knowledge of Klaviyo, Judge.me, Gorgias, Klarna, TWINT, MyParcel, A/B Tasty, Dynamic Yield, and Convert. Experience integrating PIM (inRiver, Algolia), DatoCMS, ERP (iScala, Dynamics 365), and Azure Service Bus/Functions.
AI & Agentic Engineering
Building custom agent workflows and skills using Claude Code and Codex; MCP integration and self-hosted servers; context engineering and schema-validated knowledge systems; LLM-assisted review and test generation.
Analytics & Tag Management
Experience with Google Tag Manager, GA4, dataLayer, checkout pixel, store pixels, and vendor-app behaviour tracking. Audited and restructured GTM template estates across EMEA services for enterprise clients.
Team Leadership & Delivery
Led and coached teams of 5–7 developers including mentorship, growth planning, A/B testing coordination, documentation, runbooks, and delivery status reporting. Migration frontend lead on a Magento 2 to Shopify replatform for a multi-brand regulated-retail group.
Conversion Rate Optimisation
Delivered CRO-focused rebuilds measured against order data, including PDP conversion rebuilds, paid-upgrade attach rate improvements, and revenue-per-session uplifts across multiple Shopify merchants.
Experience
Professional experience5 - 10 years
Freelancer since2022
Languages
GermanBasic knowledgeEnglishFluentRussianNative speakerUkrainianNative speaker
Project history
Embedded Shopify app with multi-tenant architecture, live since Aug 2026. A storefront configurator allowing buyers to free-build a PC with live compatibility validation and server-authoritative pricing, added to cart as a single line item. Built with React Router (framework mode), TypeScript, Prisma/PostgreSQL (22 migrations), Shopify App Bridge + Polaris, Admin GraphQL with codegen, Cart Transform Shopify Function, theme app extension, App Proxy, idempotent webhook processing, Prisma-backed OAuth session storage, Preact storefront bundle, Docker, Vitest (1,900+ tests across 279 files), and architecture documented as 11 ADRs and a C4 model.
Senior Software Engineer at EPAM Systems based in Kyiv, remote. Worked across multiple enterprise client engagements: migration frontend lead on a Magento 2 to Shopify replatform for a multi-brand regulated-retail group; platform-product engineer on a shared Shopify Horizon theme platform; analytics engineering for a global energy & industrial-automation group (GTM restructuring across EMEA); and key engineer on a 14-market composable MACH replatform for an enterprise industrial-tools group covering 8 languages and 15 markets.
Independent consultancy run alongside EPAM, Upwork Top Rated Plus with 100% Job Success. Hands-on engineer and technical owner across a portfolio of Shopify merchants. Clients include CACTi PCs (Online Store 2.0 migration, PDP conversion rebuild, configurator app), Creative Lab Amsterdam (CRO and full Enterprise theme migration), The Soft (Prestige launch with Digital Product Passport and Swiss VAT), Sittingsuits, Womy Sleeper, D&B Rental Displays (multi-market B2C/B2B estate), and ecommajesty.com (Astro on Cloudflare Pages/Workers). Also built Cortex, a schema-validated internal AI knowledge base.