Serhii NezhyhaiShopify developer

CV

Shopify developer with about two years focused on one electronics retailer: a Dawn-based Liquid storefront and the apps around it — a Gadget back-office app with banking, marketplace and shipping integrations, a supplier price-sync desktop tool, an AI storefront assistant, and a public Shopify App Store discounts app. Earlier: React and Next.js agency work and a 12-month fullstack program. Comfortable owning a scope end to end and writing the spec first.

Availability
Kyiv, UTC+2. Employed at Informatica; open to interesting Shopify or AI-commerce work.
Location
Kyiv, Ukraine · UTC+2
Languages
English (B2, working) · Ukrainian (native)

Experience

Shopify Web Developer

2024 — present

Informatica

Sole developer on the storefront (informatica.com.ua) and the apps and automations behind it: a customised Dawn theme in Liquid, a Gadget back-office app, an Electron price-sync tool, an AI chat assistant, and a public Shopify app. Most integrations are Ukraine-specific.

  • Shipped a public Shopify App Store app that applies Google's automated discounts at checkout via a Shopify Function
  • Built and maintain a Gadget back-office app: bank-payment reconciliation, Ukrainian fiscal receipts, Rozetka marketplace and Nova Poshta order flows, supplier product import with AI-generated descriptions
  • Wrote a repeatable Lighthouse measurement harness for the theme and use it to accept or reject each performance change
  • Built an AI storefront assistant on Claude and the Model Context Protocol for catalogue search, cart building and order status

Liquid · Online Store 2.0 · Web Components · Gadget.dev · Remix · Polaris · GraphQL Admin API · TypeScript · React

Frontend Developer Intern

2023 — 2024

SoftRyzen

Remote internship building commercial marketing sites. Team lead on one project.

  • Delivered several client sites in React and Next.js with Strapi and Sanity as headless CMS
  • Led the CMS integration and coordinated the team on one build

React · Next.js · TypeScript · Strapi · Sanity · Tailwind CSS

E-marketing & site support

2015 — 2023

Informatica

Ran the retailer's website on WordPress and handled SEO and paid search. Moved into development through a fullstack program and the SoftRyzen internship, then took over the Shopify build.

  • Kept the storefront and catalogue current day to day — the groundwork for the later move to Shopify

WordPress · JavaScript · SEO · Google Ads

Skills

Marked honestly: production means I've shipped and maintained it on a live store; working means I've built with it but wouldn't claim depth.

Shopify core

  • Liquidproduction
  • Online Store 2.0 sections & blocksproduction
  • Ajax & Section Rendering APIproduction
  • Metafields & metaobjectsproduction
  • theme-checkproduction
  • Shopify Functionsworking

Frontend

  • JavaScriptproduction
  • TypeScriptproduction
  • Reactproduction
  • Web Componentsproduction
  • CSS architecture & design tokensproduction
  • Next.jsworking
  • Core Web Vitalsworking

Apps

  • Gadget.devproduction
  • Polarisproduction
  • App Bridgeproduction
  • GraphQL Admin APIproduction
  • Admin UI extensionsproduction
  • Remix (Shopify app template)working
  • Webhooks & GDPR complianceworking

Headless

  • Hydrogenworking
  • Storefront APIworking

Data & integrations

  • Third-party REST & GraphQL APIsproduction
  • Google Sheets & Merchant Center APIsproduction
  • XML / CSV feed generationproduction
  • Bulk operations & rate limitsproduction
  • OAuth 2.0 flowsworking
  • Puppeteer scrapingworking

AI

  • LLM APIs — OpenAI & Anthropicproduction
  • Retrieval & embeddingsproduction
  • AI-assisted developmentproduction
  • Model Context Protocol toolsworking
  • Vision models for image QAworking

Tooling & DevOps

  • Shopify CLIproduction
  • Git & GitHubproduction
  • Electron / Electron Forgeworking
  • Fly.ioworking
  • Cloudflare Workersworking

Selected projects

Each links to the full case study.

Education and certifications