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Senior WordPress & WooCommerce engineer with 10+ years of experience delivering high-scale, performance-critical e-commerce platforms for international clients. I specialize in WooCommerce architecture, custom plugin ecosystems, and complex ERP/CRM/payment integrations. I own the full technical lifecycle—from architecture and production deployment to incident resolution—while focusing on Core Web Vitals, code quality, and scalable solutions.…Senior WordPress & WooCommerce engineer with 10+ years of experience delivering high-scale, performance-critical e-commerce platforms for international clients. I specialize in WooCommerce architecture, custom plugin ecosystems, and complex ERP/CRM/payment integrations. I own the full technical lifecycle—from architecture and production deployment to incident resolution—while focusing on Core Web Vitals, code quality, and scalable solutions.

PIOTR ŚLIWA

Web Developer, Front-End Developer, Web Designer, +6

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Senior WordPress & WooCommerce engineer with 10+ years of experience delivering high-scale, performance-critical e-commerce platforms for international clients. I specialize in WooCommerce architecture, custom plugin ecosystems, and complex ERP/CRM/payment integrations. I own the full technical lifecycle—from architecture and production deployment to incident resolution—while focusing on Core Web Vitals, code quality, and scalable solutions.…Senior WordPress & WooCommerce engineer with 10+ years of experience delivering high-scale, performance-critical e-commerce platforms for international clients. I specialize in WooCommerce architecture, custom plugin ecosystems, and complex ERP/CRM/payment integrations. I own the full technical lifecycle—from architecture and production deployment to incident resolution—while focusing on Core Web Vitals, code quality, and scalable solutions.

Available to hire

Senior WordPress & WooCommerce engineer with 10+ years of experience delivering high-scale, performance-critical e-commerce platforms for international clients. I specialize in WooCommerce architecture, custom plugin ecosystems, and complex ERP/CRM/payment integrations.

I own the full technical lifecycle—from architecture and production deployment to incident resolution—while focusing on Core Web Vitals, code quality, and scalable solutions.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Polish

Fluent

English

Advanced

Work Experience

Senior Web Developer at INSPEERITY

January 1, 2021 - Present

Architected WooCommerce and Shopware platforms with custom checkout flows, complex business logic, and multi-system ERP/payment integrations. Led Core Web Vitals optimization and implemented multi-layer caching using Cloudflare and Redis to reduce TTFB and backend load across production systems. Contributed to architecture decisions, coding quality standards, and Agile technical planning for WP/WooCommerce delivery.

WordPress Developer at ADVANT INTERACTIVE

January 1, 2016 - January 1, 2021

Engineered custom WordPress themes and plugins (ACF, Gutenberg, WordPress REST API) for long-term US agency clients. Led Core Web Vitals and PageSpeed initiatives, including large-scale site migrations, maintaining scalable and quality-focused codebases.

Web Developer at ADHD INTERACTIVE

January 1, 2014 - January 1, 2016

Built responsive front-ends across WordPress, Kentico, and Umbraco. Integrated third-party APIs and improved overall platform performance.

WordPress & WooCommerce Consultant at DECODIO (Freelance)

January 1, 2013 - Present

Led end-to-end delivery of custom WordPress and WooCommerce projects—from architecture decisions through deployment and long-term maintenance. Designed plugin-based architectures and integrations with CRM/ERP systems (Pipedrive, Salesforce, HubSpot). Acted as a technical advisor providing architecture decisions, performance audits, and long-term platform strategy.

Freelance Web Developer & Designer at Decodio.pl

January 1, 2013 - Present

Building advanced WooCommerce/Shopware solutions, custom checkout, API work, CWV optimization. Caching, debugging, integrations, and Agile collaboration with UX/backend teams. Custom themes/plugins, ACF, CPT, Gutenberg, WP REST API, Page Speed optimization. SEO, migrations, UI-focused builds, long-term cooperation with US clients. Frontend for WP/Kentico/Umbraco, RWD, UI components, animations.