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Web developer with ~5 years of commercial experience delivering B2B websites and eCommerce solutions for direct clients and software houses. Builds Gutenberg/FSE themes and React (FSE themes + custom integrations) and develops custom REST API endpoints to connect WordPress/WooCommerce and external systems. Focused on performance, accessibility, SEO, and maintainable code—refactoring legacy code, diagnosing bottlenecks (e.g., panel search time reduced from ~20s to ~1.5s), and shipping reliable improvements using Docker and CI/CD. Experienced working with international stakeholders across the US, Germany, and the UK.…Web developer with ~5 years of commercial experience delivering B2B websites and eCommerce solutions for direct clients and software houses. Builds Gutenberg/FSE themes and React (FSE themes + custom integrations) and develops custom REST API endpoints to connect WordPress/WooCommerce and external systems. Focused on performance, accessibility, SEO, and maintainable code—refactoring legacy code, diagnosing bottlenecks (e.g., panel search time reduced from ~20s to ~1.5s), and shipping reliable improvements using Docker and CI/CD. Experienced working with international stakeholders across the US, Germany, and the UK.

Jarosław Decowski

Web Developer, Front-End Developer, Back-End Developer, +1

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Web developer with ~5 years of commercial experience delivering B2B websites and eCommerce solutions for direct clients and software houses. Builds Gutenberg/FSE themes and React (FSE themes + custom integrations) and develops custom REST API endpoints to connect WordPress/WooCommerce and external systems. Focused on performance, accessibility, SEO, and maintainable code—refactoring legacy code, diagnosing bottlenecks (e.g., panel search time reduced from ~20s to ~1.5s), and shipping reliable improvements using Docker and CI/CD. Experienced working with international stakeholders across the US, Germany, and the UK.…Web developer with ~5 years of commercial experience delivering B2B websites and eCommerce solutions for direct clients and software houses. Builds Gutenberg/FSE themes and React (FSE themes + custom integrations) and develops custom REST API endpoints to connect WordPress/WooCommerce and external systems. Focused on performance, accessibility, SEO, and maintainable code—refactoring legacy code, diagnosing bottlenecks (e.g., panel search time reduced from ~20s to ~1.5s), and shipping reliable improvements using Docker and CI/CD. Experienced working with international stakeholders across the US, Germany, and the UK.

Available to hire

Web developer with ~5 years of commercial experience delivering B2B websites and eCommerce solutions for direct clients and software houses. Builds Gutenberg/FSE themes and React (FSE themes + custom integrations) and develops custom REST API endpoints to connect WordPress/WooCommerce and external systems.

Focused on performance, accessibility, SEO, and maintainable code—refactoring legacy code, diagnosing bottlenecks (e.g., panel search time reduced from ~20s to ~1.5s), and shipping reliable improvements using Docker and CI/CD. Experienced working with international stakeholders across the US, Germany, and the UK.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Advanced

Work Experience

Web Developer (Freelance B2B)

January 1, 2026 - Present

WordPress/WooCommerce and custom integration work for direct clients and software houses. Examples include: maintaining and refactoring murd io.com theme code (theme re-factoring/redesign, components built from scratch, blog and CPT with filtering, load more, REST API, technical SEO); improving WordPress performance and page speed (e.g., 99/100); creating WordPress endpoints and integrations via REST API; building/optimizing eCommerce stores (1,000+ products / 30,000+ orders) including database and admin panel search performance improvements; refactoring stores and integrating Next.js with WooCommerce; implementing custom REST API plugins for systems such as DHL, InPost, Fakturo wnia, Orderry CRM, and order notifications to the support team.

Web Developer at Applefix.pl

April 1, 2025 - January 1, 2026

Marketing agency work: built company websites and sales landing pages for multiple group companies in parallel with a team of 3 developers. Implemented end-to-end affiliate tracking and attribution across landing pages using URL parameters, cookies and session storage carried through the funnel, and reporting via API back to external systems.

Web Developer at Intredo sp. z o.o

September 1, 2024 - March 1, 2025

WordPress/WooCommerce development using Gutenberg/FSE (theme.json, blocks, patterns), ACF Pro, Sage Roots, Timber, WP-CLI, and REST API back end in PHP (OOP) with MySQL. Frontend work in JavaScript/React/Next.js with HTML/CSS/SCSS and performance/SEO improvements, including legacy code refactoring, technical SEO and structured data (schema.org JSON-LD), Core Web Vitals and crawler optimization, plus project estimation and pricing support.

Web Developer at Tamago Software sp. z o.o

September 1, 2023 - August 1, 2024

Developed traffic-source-driven funnel engine components: conditional content, upsells/down-sells, exit popups, and discount calculations per campaign. Implemented build-level optimization automation (minification, compression, image conversion) and integrated landing pages with an external store API to place orders directly from campaigns. Built fast static sites in Astro (90+ mobile/desktop) and WordPress content sites to feed organic traffic into campaign funnels.

WordPress Developer at Payeye Sp. z o.o

February 1, 2022 - August 1, 2023

Fintech (biometric payments): sole developer responsible for company websites supporting an 8-person marketing team. Built an interactive map for location acceptance of payment method (Leaflet, 100+ points) with custom frontend view powered by internal API. Delivered a WordPress training platform for selected clients with password-protected access and permission control. Developed WordPress themes using Timber (object-oriented PHP) and JavaScript, performed REST API integrations (including custom endpoints in WordPress), managed staging/production environments, and implemented frontend animations with GSAP.

Web Developer at People Sp. z o.o

September 1, 2020 - January 1, 2022

Agency: worked on ~14 projects with direct client communication (calls in English) for clients in the US, Germany and the UK. Outsourced frontend work for an international footwear brand store (vanilla JavaScript, HTML templates for a Java backend), coded custom WordPress sites, improved developer workflow (local dev environment). Integrated systems via REST API and optimized for performance, accessibility and SEO. Also estimated/priced projects and supported COO with WordPress site training; Docker/local environments and GitHub Actions CI/CD with cookie bot compliance for Google Consent Mode v2.