Bartłomiej Zalas · Poland (CET) · Remote

I help Shopify Plus and Magento brands improve site speed, fix revenue-impacting issues, and increase conversions.

15+ years in eCommerce · Shopify Plus · Magento 2 Certified · Core Web Vitals · DevOps · AI-assisted delivery

Book a Free 30-Minute Consultation

Schedule a CallView Case StudiesHire Me
BZ
Poland (CET) · Remotebart.zalas@gmail.com

Case Studies

Problem → solution → business outcome. The questions US clients ask first.

Problem

Legacy Magento storefronts were slow, hard to maintain, and blocking growth on a regulated US market.

Solution

Led Magento-to-Shopify Plus migration, custom theme work, checkout extensibility, and compliance-focused storefront logic.

Results

  • Improved Core Web Vitals (INP, LCP) across key templates
  • Reduced page load time on product and collection pages
  • Built Delta-9 state restriction logic for compliant sales
  • Recharge subscription integrations
  • Klaviyo marketing integrations
Shopify Plus
Shopify Functions
Checkout UI
Recharge
Klaviyo

Magento Hyvä — B2B Foodservice

7daychef (Swanwick Foodservice)

Problem

Slow Magento store, outdated stack, and infrastructure that couldn't support catalog scale or reliable checkout.

Solution

Magento 1→2 migration, Hyvä theme rebuild, caching layer, and full DevOps setup.

Results

  • Redis and Varnish caching for faster TTFB
  • Cloudflare in front of production traffic
  • ElasticSearch for catalog performance
  • CI/CD and staging/production environments
Magento 2
Hyvä
Redis
Varnish
Cloudflare
DigitalOcean

Problem

Checkout failures and Stripe integration issues were blocking orders and damaging conversion.

Solution

Debugged payment flow, Stripe integration, and checkout edge cases end to end.

Results

  • Resolved checkout failures blocking completed orders
  • Fixed Stripe integration and payment edge cases
  • Stabilized checkout for ongoing subscription revenue
Shopify
Stripe
Checkout
JavaScript

Available for White-Label Agency Partnerships

US agencies often need a reliable senior developer for overflow work, migrations, and performance fixes—without hiring full-time.

  • US time zone overlap
  • Long-term contracts
  • Shopify Plus & Magento 2
  • White-label friendly
  • AI-assisted delivery for faster turnaround
Partner With Me

Services

Shopify Plus Developer, Magento 2 Developer, and DevOps for ecommerce teams.

Shopify Plus

  • ·Theme development
  • ·Shopify Functions
  • ·Checkout Extensibility
  • ·Recharge subscriptions
  • ·Klaviyo integrations
  • ·Shopify migration expert (Magento to Shopify)

Magento 2

  • ·Magento Hyvä developer
  • ·Performance optimization
  • ·Custom modules
  • ·Third-party integrations
  • ·Magento 1 to Magento 2 migrations

DevOps

  • ·AWS
  • ·DigitalOcean
  • ·Cloudflare
  • ·CI/CD pipelines
  • ·Staging & production environments

AI-Assisted Development

  • ·Cursor IDE & AI agents for faster implementation
  • ·Code review and refactoring with AI support
  • ·Debugging across local, staging, and production (SSH)
  • ·Documentation and technical problem-solving

What Clients Say

“Bart fixed issues that other developers couldn't—fast, clear communication, and solid Shopify Plus work.”

— Agency client, US ecommerce

“Great Shopify Plus developer. Reliable on remote contracts and comfortable with complex checkout requirements.”

— Brand stakeholder, CBD vertical

“Reliable Magento expert—performance, Hyvä, and DevOps. Exactly what we needed for a long-term engagement.”

— Technical lead, UK agency

About

Shopify Plus Developer and Magento 2 Certified expert with 15+ years in ecommerce. I help US brands and agencies fix revenue-impacting issues—Shopify performance optimization, Shopify speed optimization, checkout failures, and Magento Hyvä performance. I use AI-assisted workflows (Cursor IDE & agents) to deliver faster audits, refactors, and fixes on local and server environments. Available for white-label agency partnerships and long-term remote contracts with US time zone overlap.

Remote from Poland with overlap for US teams. Adobe Certified Magento Commerce Developer. I use AI tools (Cursor IDE & agents) to move faster on performance work, checkout fixes, and Magento Hyvä projects—without cutting corners on quality.

Work Experience

cbdMD
Remote

2021 – Present

Magento Frontend Lead → Shopify Plus developer

Lead frontend Magento developer. Lead Shopify Plus developer. Technologies: Magento 2, Shopify Plus, Hyva, Tailwind, ScriptEditor, Ruby, JavaScript, KnockoutJs, AlpineJs, Node.js, Shopify Checkout UI, Shopify Functions

pawCBD
Remote

2021 – Present

Shopify Plus

Lead frontend Magento developer. Lead Shopify Plus developer. Technologies: Magento 2, Shopify Plus, Hyva, Tailwind, ScriptEditor, Ruby, JavaScript, KnockoutJs, AlpineJs, Node.js, Shopify Checkout UI, Shopify Functions

Oasis
Remote

2024 – null

Shopify Plus

Implemented new features, Technologies: Shopify Plus, Tailwind, ScriptEditor, Ruby, JavaScript, KnockoutJs, AlpineJs, Node.js, Shopify Checkout UI, Shopify Functions, GraphQL

HempMD
Remote

2023 – null

Shopify Plus developer

Shopify Plus, ScriptEditor, Checkout Functions

MyPawMD
Remote

2024 – null

Shopify Plus

Shopify Plus

DirectCbdOnline
Remote

2024 – 2024

Shopify Plus

Implemented new features, Technologies: Shopify Plus, Tailwind, ScriptEditor, Ruby, JavaScript, KnockoutJs, AlpineJs, Node.js, Shopify Checkout UI, Shopify Functions, GraphQL

AtrxLabs
Remote

2024 – null

Shopify Plus

Shopify Plus

Swanwick Foodservice
Remote

2010 – null

Magento 1 / Magento 2 Developer

Magento developer fullstack, Magento 1-2 migration , security patches, updates, Hyva themes, dev-ops, DigitalOcean cloud service, ElasticSearch, Varnish, Redis, Cloudflare workers, AMP pages, gTag, setting up server, setting up CI/CD pipelines, setting up staging and production environments, setting up dev-ops for the whole company.

The Scotch Malt Whisky Society Hong Kong
Remote

2024-2024 – null

Magento 1

magento 1 frontend, updates of security patches , AWS switching instances to my security key ( no access to ssh, only access to the AWS console after old developers), fixing reports, fixing mailing services, AWS optimization for prices, fixing reports, fixing mailing services.

Pangea Laboratories
OnSite
Remote

2024 – 2024

Magento/DevOps/Shopify Plus

Implemented new features, Technologies: Magento, AWS, CodeDeploy, Shopify Plus, Tailwind, ScriptEditor, Ruby, JavaScript, KnockoutJs, AlpineJs, Node.js, Shopify Checkout UI, Shopify Functions, GraphQL

Medik8
OnSite
Remote

2024 – 2024

Magento/DevOps/Shopify Plus

Implemented new features, Technologies: Magento, AWS, CodeDeploy, Shopify Plus, Tailwind, ScriptEditor, Ruby, JavaScript, KnockoutJs, AlpineJs, Node.js, Shopify Checkout UI, Shopify Functions, GraphQL

Nanogen
OnSite
Remote

2024 – 2024

Magento/DevOps/Shopify Plus

Implemented new features, Technologies: Magento, AWS, CodeDeploy, Shopify Plus, Tailwind, ScriptEditor, Ruby, JavaScript, KnockoutJs, AlpineJs, Node.js, Shopify Checkout UI, Shopify Functions, GraphQL

Ready Teddy Go
Remote

2014 – 2014

Magento 1 - Magento 2

Magento 1, migration to Magento 2, creating new theme, setting up server

Xigen
OnSite

2018 – 2018

Magento 1,2 frontend

Working for agency in Bedford, UK. https://www.jacksonsart.com/, https://windowware.co.uk/,

Universal Web Design
OnSite

2017 – 2017

Magento, SEO, Wordpress

Working for web design agency, SEO

Education

Olsztyn University of Warmia-Mazury

2004 – 2010
Bachelor's Degree, MScEng

Skills

Magento 1 & 2
Hyva
JavaScript
AlpineJs
Tailwind
AWS
TypeScript
React/Next.js/Remix
Shopify Plus
Node.js
GraphQL
Cursor IDE
Cursor Agent (AI-assisted dev)
Server / SSH workflows

Book a Free 30-Minute Consultation

Tell me what's broken—slow pages, checkout issues, a migration, or agency overflow. I'll suggest a practical next step.

Schedule a Call
AdobeIconLinkedIn

More Projects

cbdMD

Magento Frontend Lead → Shopify Plus developer

Magento 2
Porto theme
Hyva
Shopify Plus
Hyva
Tailwind
Script Editor
Ruby
AlpineJs
Node Js
Shopify Checkout UI
Shopify Functions

pawCBD

Magento Frontend Lead → Shopify Plus developer

Magento 2
Porto theme
Hyva
Shopify Plus
Hyva
Tailwind
Script Editor
Ruby
AlpineJs
Node Js
Shopify Checkout UI
Shopify Functions

Medik8

Cosmetics brand company that offers a range of products to help with skin care

Lead Frontend Developer
Magento
AWS
CodeDeploy
Shopify Plus
Tailwind
ScriptEditor
Ruby
JavaScript
KnockoutJs
AlpineJs
Node.js
Shopify Checkout UI
Shopify Functions
GraphQL

Nanogen

Nanogen is a hair care brand that offers a range of products to help with hair growth and hair thickening.

Lead Frontend Developer
Magento
AWS
CodeDeploy
Shopify Plus
Tailwind
ScriptEditor
Ruby
JavaScript
KnockoutJs
AlpineJs
Node.js
Shopify Checkout UI
Shopify Functions
GraphQL

7daychef

Swanwick Foodservice Equipment Ltd, trading as 7daychef, is a leading supplier of commercial catering equipment and refrigeration to the catering industry

Hyva
Magento
Magento 1-2 migration
DigitalOcean
Tailwind
JavaScript
KnockoutJs
AlpineJs
AMP pages
gTag
ElasticSearch
dev-ops
Varnish
Redis

Maison21

Luxury menswear retailer (Markham, ON). Shopify storefront redesign and SEO. Started 2026—ongoing.

Shopify
Store redesign
SEO
Liquid
Theme development

Maplin

Maplin is a British retailer of electronic goods in the United Kingdom and Ireland. The company went into administration in March 2018 and closed all of its stores.

Side Project
Magento
PHP
phtml
Custom module

Blazesunglasses

blazesunglasses.com british company selling sunglasses and other accessories.

Side Project
Magento 1
PHP
phtml
Custom module
server maintenance
magento updates
security patches

The Beauty Booth

The Beauty Booth is a British selling beauty products and accessories.

Side Project
Magento 1
PHP
phtml
Custom module
server maintenance
magento updates
security patches

BroadLane

BroadLane is a British company selling caravans and other accessories.

Side Project
Magento
PHP
phtml
Custom module

Ready Teddy Go

Ready Teddy Go is a British company selling teddy bears and other accessories.

Side Project
Magento 1 & 2
Migration
PHP
phtml
Custom module
Custom theme
Teddy bear builder

Printer Direct

Printer Direct is a British company selling printers and other accessories.

Side Project
Magento
PHP
phtml
Custom module
web scraping
server maintenance
Price update module
from PSD to HTML
multistore
javascript

Anchor Safety

Anchor Safety is a British company selling safety equipment and other accessories.

Side Project
Magento
PHP
phtml
Custom module
fix search engine
fix filtration on layered navigation
b2b store
javascript

MyFabCloset

MyFabCloset is a British company selling clothes and other accessories.

Side Project
Magento 1 & 2
migration from Magento 1 to Magento 2
PHP
phtml
Custom module
custom theme
javascript

Xigen Agency

I was working for Xigen agency in Bedford, UK. Projects: https://www.jacksonsart.com/, https://windowware.co.uk/, https://www.ukprinting.com/, https://www.ukprinting.com/coloured-bell-mug, https://www.ukprinting.com/coloured-durham-mug, https://www.the-shredder-warehouse.com/, https://www.the-laminator-warehouse.com/, https://www.the-binding-warehouse.com/, https://www.officevogue.co.uk, https://www.crazykangaroo.com/instant-ink, https://www.jacksonsart.com/jacksons-professional-oil-colour,

Side Project
Magento 1 & 2
PHP
phtml
javascript

Autoinparts

Autoinparts – Magento 2 – creating tabel for grouped products, https://autoinparts.com/budget-locking-wheel-bolts-60-seat

Side Project
Magento
PHP
phtml
javascript