Senior PHP & TYPO3 Developer · Berlin

Software
Developer
& TYPO3

I build stable TYPO3 systems — clean codebase, high performance and real accessibility to WCAG-AAA. From concept to go-live.

Selected work

03

Companies & clients

Zebra Group → Brandung → Qbus → Engine-Productions →

What I offer

TYPO3 development

Extensions, backend modules and clean architecture — from concept to go-live.

Major updates & migrations

Safe upgrades to current TYPO3 versions incl. migration and test plan.

Performance & accessibility

Audits and implementation up to WCAG-AAA — fast, accessible websites.

PHP & Laravel backends

Stable, maintainable backends and interfaces — also beyond TYPO3.

Technical project lead

Architecture decisions, coordination and quality assurance in the team.

Consulting & maintenance

Long-term support, code reviews and technical consulting.

In progress

In development

Parking App

I'm currently building an app all about parking — from the idea to the backend and the build. More soon.

Open Source

Giving back to the TYPO3 community

fluid-lens

GPL-2.0

A CLI tool that statically analyses Fluid templates: it finds duplicated markup structures that should become a Partial, and lints for accessibility (WCAG) and best practices — no running TYPO3 instance required.

Finds exact & near-duplicate structures
WCAG linting: missing alt text, icon-only links, duplicate IDs …
Baseline & inline ignores for existing projects
CI-ready: JSON output & exit codes
GitHub → Packagist →

Profile

A creative tech mind eager for new projects — bringing engineering and delivery together, reliably.

For over nine years I've built TYPO3 backends for NGOs, clinics and companies. A maintainable codebase matters as much to me as performance and accessibility. Currently Senior PHP Developer at Zebra Group and CTO of Yellow-Twins. Right now I'm deliberately expanding my stack into Laravel.

Languages
Deutsch — Native
Español — Fluent
English — Fluent
Off the clock
Bouldering · surfing · cooking · making things by hand · boat collective

Experience

  1. 2025 — now

    Senior PHP Developer — Zebra Group

    PHP backend development in-team — scalable applications and clean architecture.

  2. 2025 — now

    CTO & CEO — Yellow-Twins

    3 TYPO3 projects from technical concept to go-live, WCAG-AAA throughout.

  3. 2024 — now

    Software Developer · Freelance — Köln / Berlin

    TYPO3 backend for NGOs & companies, major updates incl. migration plans, Solr integration.

  4. 2021 — 2023

    Software Developer — Brandung GmbH

    Technical lead Mediclin (70+ tenants), TYPO3 project Klinikum Nürnberg, Schülerhilfe upgrades.

  5. 2019 — 2021

    Junior Software Developer — Engine-Productions

    TYPO3 extensions in the backend, gradually leading smaller projects.

  6. 2016 — 2019

    Ausbildung Fachinformatiker — Engine-Productions

    Application development — the foundation for clean, structured work.

Skills

Programming

PHP · Laravel · TypoScript · Fluid · JavaScript · HTML5 · CSS3 · SCSS · SQL

TYPO3

CMS V7–V13 · Extensions · TCA · TSconfig · Backend-Module · Form Framework · Middleware (PSR-15) · PSR-14 Events · Caching · Routing · Updates

DevOps & Deployment

Git · Composer · GitLab CI/CD · Docker / DDEV · Linux Shell · Automated testing · Hosting

Workflow

Project lead · Kanban / Agile · JIRA · Trello · ClickUp · Figma

Contact

Let's build your next project

ramon@yellow-twins.com → GitHub → LinkedIn →
Accent