OpenCart

OpenCart Developer in Poland

Development, support and improvement of OpenCart stores: custom modules and themes, speed optimization, version upgrades, payment and delivery integrations. A cost-effective online store you fully own - with one accountable specialist.

Discuss Project

What I do with OpenCart

OpenCart is a lightweight, open-source e-commerce platform - a great fit for small and mid-sized stores that want full ownership without Magento's complexity or Shopify's monthly fees. I build and refine OpenCart stores end to end: custom modules, themes, performance and long-term support.

Most OpenCart requests are refinement and rescue: adding features, fixing broken extensions (OCMOD/vQmod), upgrading old versions, closing vulnerabilities and speeding up slow stores. I also build new stores and set up reliable payment and delivery integrations for the Polish market.

I work as an independent developer - you communicate directly with me, with clear estimates and full responsibility for the result.

OpenCart store development

  • New stores on OpenCart 4
  • Catalog, options and attributes setup
  • Multi-store and multi-language
  • Payments and delivery for Poland

Custom modules and themes

  • Custom modules (OCMOD)
  • Bespoke responsive themes
  • Checkout and cart customization
  • Extension conflict resolution

Refinement and improvements

  • New features on existing stores
  • Fixing broken OCMOD/vQmod code
  • Redesign without losing data
  • Page speed and Core Web Vitals

Version upgrades

  • Upgrade from OpenCart 1.5/2.x/3.x
  • Data and template migration
  • Extension replacement strategy
  • SEO and URL preservation

Integrations

  • Payments: PayU, Przelewy24, Stripe
  • Delivery (InPost) and couriers
  • ERP, CRM and accounting systems
  • Marketplaces and product feeds

Support and security

  • Core and module updates
  • Vulnerability fixes and hardening
  • Malware removal and recovery
  • Backups, monitoring and SLA
OpenCart 4OCMODPHPMySQLTwigjQueryBootstrapREST APICloudflareGit

Why OpenCart and why me

OpenCart gives you a full-featured store with no license or monthly platform fees. I keep it fast, secure and tailored to your business - with clean modules instead of a pile of conflicting extensions.

No platform fees

Open-source and free to run - no monthly subscription, no transaction cut, full ownership of code and data.

Lightweight and fast

A lean core means quick launches and fast pages - ideal for small and mid-sized catalogs.

Easy to manage

A clear admin panel your team can run day to day - products, orders, customers and reports.

Security and updates

Timely core updates, hardening and malware cleanup keep your store safe and trusted.

Work directly with a specialist

No middlemen: you communicate directly with me - from defining tasks to launch and support.

Long-term support

I maintain the store after launch: updates, fixes and new features as your business grows.

Viktar Liukevich

About me

I'm Viktar Liukevich

Full-stack developer · 15+ years creating web

I'm an OpenCart developer based in Warsaw. I build, support and improve OpenCart stores: custom modules and themes, performance tuning, version upgrades and payment/delivery integrations for the Polish market.
LIUKIT is my personal brand. You work directly with me: module development, theme work, integrations and deployment - from the task to a live, selling store.
A lot of my OpenCart work is rescue and optimization: fixing broken OCMOD extensions, upgrading legacy versions, cleaning malware and speeding up slow stores.
Based in Warsaw, I work with clients in Poland, Europe, the UAE and the USA - in English, Polish or Russian.
300+
Completed Projects
90+
Clients
10+
Partners

Advantages

  • 15+ years working for myself
  • Wide technology stack
  • Rapid development
  • Warranty and support
  • Global quality standards
  • Working with clients worldwide
  • Innovative technological solutions