Антон

ANTON LIVADNIJ
Fullstack Developer
Kyiv region, Ukraine | [open contact info](look above in the "contact info" section) | LinkedIn | GitHub
Profile
Fullstack developer with 4 years of experience shipping production web applications, Shopify apps, and automation systems
using React, Next.js, Node.js, and TypeScript. Delivers complete systems end-to-end – from data pipelines to deployment –
with a track record of published Shopify apps, measurable delivery-time and bug reductions, and integrations across ERP,
marketplace, and Telegram platforms.
Technical Skills
Languages: JavaScript, TypeScript, HTML, CSS, SASS
Frontend: React.js, Next.js, Remix, Redux Toolkit, Material UI, Shadcn UI
Backend & DB: Node.js, Fastify, Express, MongoDB, MySQL (Drizzle ORM), Firebase, Convex
Automation: Puppeteer, Cheerio, node-cron, proxy rotation / anti-detect browsing
Integrations: Shopify Admin REST/GraphQL, Telegram Bot API, OpenAI API, Google APIs, Nova Poshta, Prom.ua
DevOps: Docker, Docker Compose, Caddy, Git, Jira, Sentry, PostHog, Tailscale
Work Experience
Fullstack Developer – Spars.im Aug 2025 – Feb 2026
Remote | Shopify apps (Remix, Polaris, App Bridge)
• Built and maintained public Shopify apps (Remix) with embedded admin dashboards for courses, quizzes, and cookie
banners; implemented theme app embeds/blocks for low-friction storefront integration.
• Shipped 2 public Shopify apps plus a promo/rewards platform, built and maintained end-to-end through Shopify's app
review process.
• Introduced Sentry error tracking, improving app stability and cutting issue detection/resolution time.
Freelance Fullstack Developer 2022 – Aug 2025, Mar 2026 – Present
Remote | React.js, Next.js, Node.js
• Design and build full-stack web apps, automation systems, and Telegram-based platforms end-to-end (scraping, pipelines,
Docker/Caddy/VPS deployment) for e-commerce, retail, and lead-gen clients.
• Converted 2 project-based engagements (LuxMedia, O&P) into ongoing clients; cut delivery time 25% via reusable
component libraries and cut post-launch bugs 40% via code quality standards.
Selected Projects
• LuxMedia – Telegram Commerce Platform (Feb 2026 – Present): Built a 4-service Telegram commerce ecosystem
(ordering bot, scraper, Next.js admin panel, inline-query bot) integrated with the client's BAS accounting system via
Tailscale, processing ~50 orders/day and eliminating manual order entry.
• O&P – Lead Generation & Marketplace Automation (Mar 2026 – Present): Built an AI-driven lead-gen pipeline (GPT-
4o-mini, self-hosted SearXNG, Puppeteer) normalizing prospect data into MongoDB; built a dual XML/CSV export system
for the Prom.ua marketplace.
• Bu Bu House – Booking Platform (Apr – Jul 2026): Architected a 5-service booking system (MongoDB, MinIO, Fastify,
Next.js) with Monobank payments, auto-expiring date holds, and an admin panel covering properties, bookings, and
customers, designed to scale from a single property to an unlimited number of properties and add-ons.
• Uni-Scraper – Universal Scraping Framework (Jul 2026 – Present): Designed a site-agnostic TypeScript scraping
framework (typed adapters, anti-detect browser, two-stage proxy validation, streaming JSONL output), currently
supporting 2 target sites.
• Fuzcompare & Vocab-Generator – Product Matching Pipeline (Jun 2026 – Present): Built a six-stage fuzzy product-
matching engine (translate, normalize, tokenize, classify, score, verdict) achieving ~95% match accuracy across a 100-pair
automated test suite for e-commerce catalog matching.
• Viator – Scraper Monitoring Platform (Apr 2026 – Present): Built a Fastify/MongoDB scraping and diffing backend,
running scraper daily automated monitoring, plus a Next.js admin dashboard Telegram Mini App with Telegram
notifications.
• Define – E-commerce Platform (Jul – Aug 2025): Built a reusable e-commerce platform (Next.js 15, MySQL/Drizzle
ORM) with product catalog and filters, quiz-based data collection, cart, checkout, and order processing, plus an admin
dashboard for product/order management, promo codes, and Nova Poshta shipping integration.