--- title: "Senior TYPO3 Developer & Frontend Engineer | OK" description: "Freelance senior TYPO3 developer & frontend engineer — 25 years building, migrating and maintaining high-traffic sites for clients and agencies across Europe." language: en date: 2019-03-05 lastmod: 2026-06-16 canonical: "https://ok-coder.eu/" format: markdown generator: "TYPO3 LLMs.txt Extension" --- # Senior TYPO3 Developer & Frontend Engineer | OK > Freelance senior TYPO3 developer & frontend engineer — 25 years building, migrating and maintaining high-traffic sites for clients and agencies across Europe. ![](https://ok-coder.eu/fileadmin/_processed_/c/2/csm_jan-slusarczyk_eeb65f7f65.jpg) **25 years in web development. Still shipping modern code.** I started building websites in 1999 and never stopped keeping up. Based in Italy, I work as a freelance developer for clients and agencies across Europe. I'm also co-founder and CTO of babyboom.pl — one of Poland's leading parenting portals, with 700,000+ unique visitors every month. There are two ways I usually work with people: **1. Creative frontend.** Demanding, design-led builds — scroll-driven storytelling, animation, interactive maps, data visualization and the polish that makes a site feel premium. Vue, Nuxt, Tailwind CSS, GSAP, TypeScript, on top of any backend (Craft, Rails, Python, plain Node or Appwrite). If your design pushes the browser, that's exactly where I want to be. **2. TYPO3 — full-stack.** Deep platform expertise most freelancers can't offer: I maintain 20+ TYPO3 installations and have delivered 50+ large projects — legacy upgrades (even those ancient 4.x systems), fresh v13 builds with headless or Turbo, custom Extbase extensions, performance optimization and complex migrations with proper CI/CD. **Also in the box:** API integrations (payments, CRM, social, custom sync), VPS / DevOps and caching, and technical SEO with Core Web Vitals — because a senior developer should understand the full stack, from the database to the CDN. **Why clients stay with me:** Most of my clients have worked with me for years — some for over a decade. That's not an accident. I don't just complete tasks: I understand business context, communicate clearly, deliver on time, and when something unexpected comes up I solve it instead of making excuses. I'm not the cheapest option, and I'm not trying to be. If you need reliable, senior-level expertise and someone who'll be there for the long haul — [let's talk](https://ok-coder.eu/contact.md). ## [Latest projects](https://ok-coder.eu/portfolio.md) 2026## BabyBoom.pl My main everyday work since 1999 — one of Poland's most popular parenting portals (700k+ monthly visitors), built on TYPO3 with a modern frontend. [ more ](https://ok-coder.eu/portfolio/babyboom-pl.md) [ ![BabyBoom.pl](https://ok-coder.eu/fileadmin/_processed_/b/1/csm_babyboom-3_c9c8572c31.jpg) ](/fileadmin/user_upload/babyboom-3.jpg) [ ![BabyBoom.pl](https://ok-coder.eu/fileadmin/_processed_/0/7/csm_babyboom-1_fee1394bfd.jpg) ](/fileadmin/user_upload/babyboom-1.jpg) TailwindCss Typescript/Node API Typo3 Typo3 Extensions Vue 2026## Erinnern für morgen Frontend for a demanding Swiss federal memorial platform — video, custom-styled maps, high-performance record filtering. [ more ](https://ok-coder.eu/portfolio/erinnern-fuer-morgen.md) [ ![Erinnern für morgen](https://ok-coder.eu/fileadmin/_processed_/f/5/csm_erinnern-1_b242c2b455.jpg) ](/fileadmin/user_upload/erinnern-1.jpg) [ ![Erinnern für morgen](https://ok-coder.eu/fileadmin/_processed_/1/1/csm_erinnern-2_d8da7d7860.jpg) ](/fileadmin/user_upload/erinnern-2.jpg) Frontend TailwindCss Animation Video Craft CMS Accessibility (a11y) Maps 2026## LiteraturSchweiz Frontend for the Swiss literature platform — a high-performance, filterable catalogue with a bold typographic design. [ more ](https://ok-coder.eu/portfolio/literaturschweiz.md) [ ![LiteraturSchweiz](https://ok-coder.eu/fileadmin/_processed_/a/e/csm_literaturschweiz-1_5e15adcf99.jpg) ](/fileadmin/user_upload/literaturschweiz-1.jpg) [ ![LiteraturSchweiz](https://ok-coder.eu/fileadmin/_processed_/3/2/csm_literaturschweiz-2_567c03a6aa.jpg) ](/fileadmin/user_upload/literaturschweiz-2.jpg) Frontend TailwindCss Animation Craft CMS 2026## Grand Digital Full TYPO3 project for a Munich digital agency — HubSpot integration, custom extensions, Turbo rendering and technical SEO. [ more ](https://ok-coder.eu/portfolio/grand-digital.md) [ ![Grand Digital](https://ok-coder.eu/fileadmin/_processed_/0/4/csm_grand-digital-1_770fead0ad.jpg) ](/fileadmin/user_upload/grand-digital-1.jpg) [ ![Grand Digital](https://ok-coder.eu/fileadmin/_processed_/0/b/csm_grand-digital-2_e3427b5965.jpg) ](/fileadmin/user_upload/grand-digital-2.jpg) Typo3 Typo3 Extensions TailwindCss Animation Frontend 2025## Bäckerfinder Full development of a new API client syncing thousands of bakery records onto an interactive map, on TYPO3. [ more ](https://ok-coder.eu/portfolio/baeckerfinder.md) [ ![Bäckerfinder](https://ok-coder.eu/fileadmin/_processed_/3/4/csm_baeckerfinder-1_62d5d567ef.jpg) ](/fileadmin/user_upload/baeckerfinder-1.jpg) [ ![Bäckerfinder](https://ok-coder.eu/fileadmin/_processed_/f/4/csm_baeckerfinder-2_fc1a6bde74.jpg) ](/fileadmin/user_upload/baeckerfinder-2.jpg) Typo3 Typo3 Extensions Frontend Maps 2024## Deutsches Bäckerhandwerk Frontend in TailwindCSS plus ongoing maintenance and upgrades for the German bakers' guild website. [ more ](https://ok-coder.eu/portfolio/deutsches-baeckerhandwerk.md) [ ![Deutsches Bäckerhandwerk](https://ok-coder.eu/fileadmin/_processed_/d/6/csm_baeckerhandwerk-1_d93c6b45ce.jpg) ](/fileadmin/user_upload/baeckerhandwerk-1.jpg) [ ![Deutsches Bäckerhandwerk](https://ok-coder.eu/fileadmin/_processed_/5/e/csm_baeckerhandwerk-2_db4d15b96f.jpg) ](/fileadmin/user_upload/baeckerhandwerk-2.jpg) Typo3 Frontend TailwindCss 2024## Back dir deine Zukunft Recruitment campaign site for the baking trade — frontend build plus frontend & backend maintenance since launch. [ more ](https://ok-coder.eu/portfolio/back-dir-deine-zukunft.md) [ ![Back dir deine Zukunft](https://ok-coder.eu/fileadmin/_processed_/7/1/csm_back-dir-deine-zukunft-1_f2ebea6208.jpg) ](/fileadmin/user_upload/back-dir-deine-zukunft-1.jpg) [ ![Back dir deine Zukunft](https://ok-coder.eu/fileadmin/_processed_/b/e/csm_back-dir-deine-zukunft-2_4ed4384c6a.jpg) ](/fileadmin/user_upload/back-dir-deine-zukunft-2.jpg) Typo3 Frontend TailwindCss 2022## Susu Water Scroll based animations with rotoscoping bottles [ more ](https://ok-coder.eu/portfolio/susu-water.md) [ ![Susu Water](https://ok-coder.eu/fileadmin/_processed_/8/5/csm_susu-water-02_1c78c8b084.jpg) ](/fileadmin/_processed_/8/5/csm_susu-water-02_2f1d678393.jpg) [ ![Susu Water](https://ok-coder.eu/fileadmin/_processed_/d/0/csm_susu-water-04_8d6c6bf43a.jpg) ](/fileadmin/_processed_/d/0/csm_susu-water-04_60df170472.jpg) Animation Frontend TailwindCss Video 2022## Jewish Effective Giving Typo3 based website with bold design by Kasper Skirgajłło-Krajewski [ more ](https://ok-coder.eu/portfolio/jewish-effective-giving.md) [ ![Jewish Effective Giving](https://ok-coder.eu/fileadmin/_processed_/b/0/csm_jewiwsh-effective-1_a8720307b8.jpg) ](/fileadmin/_processed_/b/0/csm_jewiwsh-effective-1_5f46b89f07.jpg) [ ![Jewish Effective Giving](https://ok-coder.eu/fileadmin/_processed_/a/d/csm_jewiwsh-effective-2_4caa4510c9.jpg) ](/fileadmin/_processed_/a/d/csm_jewiwsh-effective-2_64a25f8942.jpg) Animation TailwindCss Typo3 Typo3 Extensions 2022## Affinis Inverse Frontend for a single page application built on typo3. My job was styling and javascript programming (using GSAP, custom video player and other technologies). [ more ](https://ok-coder.eu/portfolio/affinis-inverse.md) [ ![Affinis Inverse](https://ok-coder.eu/fileadmin/_processed_/2/5/csm_affinis-1_f5a88bc6e2.jpg) ](/fileadmin/_processed_/2/5/csm_affinis-1_1f0f4d9e93.jpg) [ ![Affinis Inverse](https://ok-coder.eu/fileadmin/_processed_/1/3/csm_affinis-2_999397a2a8.jpg) ](/fileadmin/_processed_/1/3/csm_affinis-2_010681f72c.jpg) Animation Frontend TailwindCss Typo3 Video 2022## Otis Lift Configurator Internal tool for salespeople of Otis to prepare and visualise lift configurations [ more ](https://ok-coder.eu/portfolio/otis-lift-configurator.md) [ ![Otis Lift Configurator](https://ok-coder.eu/fileadmin/_processed_/5/4/csm_otis-1_437a9beef4.jpg) ](/fileadmin/_processed_/5/4/csm_otis-1_438dda3888.jpg) [ ![Otis Lift Configurator](https://ok-coder.eu/fileadmin/_processed_/6/d/csm_otis-4_c8460b7408.jpg) ](/fileadmin/_processed_/6/d/csm_otis-4_54982fb97a.jpg) Nuxt TailwindCss Typescript/Node API Vue 2022## Institute of English Studies - University of Warsaw A WCAG (accessibility) compliant modern website for students and faculty members. [ more ](https://ok-coder.eu/portfolio/institute-of-english-studies-university-of-warsaw.md) [ ![Institute of English Studies - University of Warsaw](https://ok-coder.eu/fileadmin/_processed_/c/d/csm_instytut-4_4712751dd2.jpg) ](/fileadmin/_processed_/c/d/csm_instytut-4_e2f85cdfee.jpg) [ ![Institute of English Studies - University of Warsaw](https://ok-coder.eu/fileadmin/_processed_/d/c/csm_instytut-3_583d266855.jpg) ](/fileadmin/_processed_/d/c/csm_instytut-3_71f4b78307.jpg) Accessibility (a11y) Bulma Typo3 Typo3 Extensions Vue 2021## Melior Frontend work on a large typo3 installation for Melior. Vanilla JS, Vue and TailwindCss [ more ](https://ok-coder.eu/portfolio/melior-ch.md) [ ![Melior](https://ok-coder.eu/fileadmin/_processed_/6/d/csm_melior01_0729905205.jpg) ](/fileadmin/user_upload/melior01.jpg) [ ![Melior](https://ok-coder.eu/fileadmin/_processed_/c/a/csm_melior02_43c8512a88.jpg) ](/fileadmin/user_upload/melior02.jpg) Frontend TailwindCss Typo3 Vue 2021## Kurkumik.pl e-commerce site built with Nuxt and custom typescript api backend [ more ](https://ok-coder.eu/portfolio/kurkumik-pl.md) [ ![Kurkumik.pl](https://ok-coder.eu/fileadmin/_processed_/3/7/csm_kurkumik-1_aae08764d9.jpg) ](/fileadmin/_processed_/3/7/csm_kurkumik-1_d7d4353227.jpg) [ ![Kurkumik.pl](https://ok-coder.eu/fileadmin/_processed_/9/4/csm_kurkumik-3_4e486ec91e.jpg) ](/fileadmin/_processed_/9/4/csm_kurkumik-3_069b67f9c2.jpg) Bulma Nuxt Typescript/Node API Vue