Danylo Petrenko

Shopify & E-Commerce Developer

Jul 2026 - Present • 2 mos

Scoped and specified a custom-made plush toy store for the UK market, from architecture to launch-ready copy. - Store structure on Shopify: 5 metaobject definitions, product metafields, 25 theme sections, canonical /pages/ routing with a 301 alias map, and two implementations of customer file upload (with and without a third-party app) - Product catalogue of 29 items — handles, titles, tags and descriptions written for each - Full en-GB copy: home, service pages, how-it-works, pricing, about, FAQ, quote form microcopy and error states, 5 transactional email templates, meta tags per page - UK compliance built into the spec rather than patched later: toy safety and age grading, CE/UKCA marking status, the bespoke-goods exemption from the 14-day cancellation right, and DMCCA rules on reviews and drip pricing - Performance targets set against Lighthouse and Core Web Vitals

Backend & Telegram Bot Developer

Apr 2026 - Present • 5 mos

Built and shipped an admin panel with a Telegram bot for a local electrical services business. - Backend on Node.js and TypeScript with tsoa-generated REST routes and OpenAPI spec, JWT auth, MongoDB Atlas, health-check endpoint and strict CORS handling - Telegram bot on telegraf delivering incoming requests to the owner in real time - Handled the deployment side end to end: diagnosed a hosting quota failure in production, compared providers on real cost and sleep behaviour, and migrated the service to a plan that fit the workload — including the single-instance constraint that a polling bot imposes - Site and campaign side: GTM event layer across 16 tracked actions, Google Ads message-match audit, and a prioritised list of hero-section fixes sequenced for a low-traffic site where A/B testing would not reach significance

Full-Stack Web Developer

Dec 2020 - Present • 5 yrs 9 mos

I design, build and maintain websites, online stores and the backend systems behind them for small businesses and solo founders. What I typically deliver: - Backends and admin panels — Node.js, TypeScript, Express/tsoa, MongoDB Atlas, JWT auth, documented REST APIs - E-commerce — Shopify (theme sections, metaobjects, metafields, URL structure and 301 mapping) and WordPress/WooCommerce (cleanup, updates, speed, SEO spec implementation) - Telegram bots with web admin panels — telegraf, polling and webhook setups, order notifications - Deployment and infrastructure — Railway, Render, Vercel, VPS; host migrations without downtime and without breaking live integrations - Conversion tracking and CRO — GTM event layers, Google Ads conversion setup, landing page audits with prioritised fixes - AI integrations where they earn their place — Claude/OpenAI API, RAG support chatbots, workflow automation How I work: I start from the business goal and the numbers behind it, name the risky parts before writing code, and document the handover so the client is not dependent on me. Clear written English, agreed scope, no surprises on the invoice.