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Available for new projects

Cezary Siwadev

WordPress developer who turns designs into fast, clean, maintainable websites. 1,300+ projects shipped for agencies and businesses since 2013.

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WordPress✦WooCommerce✦ACF✦Gutenberg✦React✦Next.js✦Webflow✦Shopify✦PHP✦GSAP✦
Figma → WordPress●Headless●REST API●Core Web Vitals●WPML●Gravity Forms●Multisite●

( 01 ) — Intro

I build websites the way agencies wish every developer did: pixel-perfect to the design, quick to deliver, easy to edit for the client, and still running smoothly years later. Long-term partner for agencies, studios and startups around the world.

0+

Jobs completed on Upwork

$0M+

Earned with happy clients

0

Hours billed

0%

Job Success · Top Rated Plus

( 02 ) — What I do

Everything your site needs, under one roof.

01

Custom WordPress themes

Figma, XD or PSD turned into a hand-coded theme. ACF flexible content, Gutenberg blocks, no page-builder bloat.

  • ACF
  • Gutenberg
  • Figma → WP
02

WooCommerce stores

Shops that sell: custom product logic, checkout tweaks, subscriptions, payment and shipping integrations.

  • Checkout
  • Subscriptions
  • Integrations
03

Plugins & integrations

Bespoke plugins, REST API connections, CRMs, Mailchimp, Gravity Forms and custom admin tools.

  • PHP
  • REST API
  • Gravity Forms
04

React, Next.js & headless

Modern frontends and headless WordPress, when speed and app-like interactions matter.

  • React
  • Next.js
  • Headless WP
05

Webflow

Figma to Webflow with a clean CMS setup, responsive layouts and smooth interactions.

  • CMS
  • Interactions
  • SEO
06

Speed & care

Core Web Vitals, migrations (Joomla → WP, hosts, staging), security and long-term maintenance.

  • Performance
  • Migrations
  • Support

( 03 ) — How it works

From design file to live site.

  1. 01

    Brief & design

    You send the Figma, a few pages of notes or just an idea. I ask the right questions up front.

  2. 02

    Build

    Clean, componentised code with an editor-friendly admin. Staging link early, updates often.

  3. 03

    Polish

    Pixel checks on every breakpoint, animations, speed and SEO basics.

  4. 04

    Launch & care

    Smooth go-live, then I stay around for fixes, new pages and the next phase.

( 04 ) — Selected work

A few of 1,300+.

All case studies →

( 05 ) — Kind words

What clients say.

★★★★★
“Cezary is probably one of the best developers I ever worked with. Not only he knows exactly what needs to be done but he is always making himself available.”
Upwork client
★★★★★
“Cezary is an excellent and disciplined developer capable of making the best decisions without the need of micro managing.”
Agency client
★★★★★
“The best experience with any developer I've had on Upwork. Everything was done right and ahead of schedule.”
Upwork client
★★★★★
“Hyper efficient, quick, and can tackle any request. Excited to work on the next project.”
Repeat client
★★★★★
“I tested 5 web developers and he was my favorite.”
Upwork client

( 06 ) — About

15+ years of shipping.

Computer science graduate, PHP programmer at a Polish interactive agency, and a full-time freelancer since 2013, working remotely with agencies and businesses in the US, UK and Europe. English and Polish.

  • Top Rated Plus
  • 100% Job Success
  • AWS DevOps Professional
  • WordPress Multisite
  1. 2006

    Computer Science, BSc

    Nicolaus Copernicus University

  2. 2011

    PHP Programmer

    GoldenSubmarine (interactive agency, Warsaw & Poznań) and Juggernaut Technology (remote)

  3. 2013

    Full-time freelancer

    Upwork: 1,300+ jobs, 5,000+ hours, $1M+ earned

  4. Now

    Remote, worldwide

    Taking on new projects and long-term partnerships

( 07 ) — Contact

Let's buildsomethinggreat.

cezary.siwa@gmail.com Hire me on Upwork ↗