Hire the Best Shopify Developers
in Lithuania

Your Meta says 40 purchases. GA4 says 28. Your store says 19. Which number do you trust when you decide where to put the next $1,000? I'm a conversion tracking and attribution specialist, and I got here the hard way: I build and run my own ecommerce stores. When the numbers are your own revenue, you can't hand-wave tracking, you have to make it actually work. That's why I know this cold, not from a course, but from fixing it on a live store taking real orders. That gap between platforms isn't a rounding error. It's iOS, ad blockers, cookie consent and browser-only pixels quietly dropping events, so ad platforms optimize on bad data and your ROAS looks worse than it is. I fix it at the source. What I do: - Meta Pixel + Conversions API (CAPI) with shared event_id deduplication. I built this from scratch as a custom mu-plugin on my own live WooCommerce store: browser and server events fire together, deduplicated, so Meta counts each sale once and optimizes on clean data - GA4 setup, audits, and "why don't these numbers match" reconciliation across Meta, GA4 and your store - Google Tag Manager and server-side GTM (Stape) - Google Ads conversion tracking and Enhanced Conversions - Consent mode and GDPR-compliant tracking that still recovers signal - Ecommerce, lead, form and call attribution Because I also build the stores, I see the whole picture, not just the tag: Shopify and WooCommerce development, conversion-focused redesigns, mobile speed and Core Web Vitals, and Klaviyo email flows. So when I fix your tracking, I understand the storefront it runs on. Why trust a cold profile: my proof isn't a slide deck, it's the live store I built and track myself, where the tracking and the storefront both have to work because it's my money on the line. I'm not learning CAPI on your account. I already shipped it on mine. Send me your store URL and what's bugging you about your numbers, and I'll reply with a short, free read on the first thing I'd fix and how I'd verify it, before you commit to anything.

My name is Mykolas, and I would love to help you with any of your Shopify, WordPress, or general web development needs. Be it custom theme development, minor fixes to the site, or conversion rate optimization efforts - you can count on me for that! Clear communication between the client and freelancer is key to success. That is why I always go above and beyond to clearly define the scope of any new project and maintain open communication with clients throughout the project. And most importantly, I always strive to establish a longer-term working relationship, rather than viewing a gig as a one-time transaction. So, if that's what you're looking for as well, we're a good match!

Experienced full stack engineer specializing in Shopify e-commerce solutions. Proficient in front-end technologies like Vue, React, JavaScript, HTML/CSS, and Shopify Liquid, alongside back-end expertise in Laravel, Node.js, Python/Django, Ruby on Rails, and databases such as PostgreSQL.

I build everything your Shopify business needs — from pixel-perfect custom themes to feature-rich apps with deep logic and integrations. I work with classic theme stacks (Online Store 2.0) and headless architectures (Storefront API + Next.js/Hydrogen, CMS), and I focus on performance (Core Web Vitals), accessibility (WCAG), maintainable architecture, and smooth releases. What I deliver: - Custom Themes (OS 2.0): sections/blocks, JSON templates, metafields/metaobjects, multilingual/Markets, pixel-perfect design fidelity. - Advanced Customizations: product personalization with live preview, dynamic pricing, subscriptions, upsell/cross-sell, bundles, promo widgets. - Shopify Apps: public (App Store) and private (internal), Theme/App/UI Extensions, Shopify Checkout Functions and Checkout Extensibility. - Shopify Plus: scaling, custom checkout logic, multi-market scenarios, ERP/CRM integrations, automations. - Headless Shopify: Storefront API/GraphQL, Next.js / Hydrogen / Remix, headless CMS integrations (Sanity/Contentful, etc.), caching, webhooks. - Performance & Accessibility: audits, improvement plans, green Core Web Vitals, WCAG compliance without compromising design. Tech Stack: HTML, CSS, JavaScript, jQuery, React, TypeScript, Redux, Next.js, Node.js, SQL, MongoDB, PHP, Rust. Liquid (Shopify template language), WCAG. APIs & Tools: Storefront/Admin (REST & GraphQL), Webhooks, App Bridge, Theme App Extensions, Checkout Extensibility/Functions. What you get: A single expert who can own both themes and apps (public/private), build a headless storefront, and implement custom checkout on Shopify Plus — with clear timelines, clean handover docs, and post-launch support.