Portrait of web developer Ingo Steinke in Berlin
Ingo Steinke

Projects, References and Case Studies

Berlin, 20 May 2026

My Work as a Frontend Web Developer

Selected work samples, customer testimonials and case studies demonstrate the added value of my work as a web developer: beautiful, efficient and successful websites, web apps and online shops that convert and inspire.

I work as a freelancer for companies and agencies, but I generally also accept projects from startups and other freelancers..

Projects: Websites, Shops and Case Studies

Screenshot der Portfolio-Website

Portfolio: Style Consultant

2023 - 2024

Kleiderordnung.Berlin is sustainable stylist Tina Steinke's portfolio website. The multilingual, responsive CMS theme is search engine optimised and environmentally friendly, with subtle animations and scrolling effects.

HTML CSS JavaScript PHP CMS

project screenshot

Portfolio: Financial Consultant

2025

Front-end web development: a minimalist design with a focus on typography and layout, implemented as a flexible theme for an accessible and responsive portfolio website with a content management system.

HTML CSS JavaScript PHP

Screenshot der Website

Agency Portfolio

2024

or the relaunch of the co-creation agency Twisted Connection’s website, I collaborated with the client and their graphic designer to extend the existing design system.

JavaScript HTML CSS CMS

Design System

2021 - 2022
As a freelance senior lead developer on a team of front-end web developers, I developed a scalable modular component design system for relaunching an international corporate customer's multiple websites (STRABAG SE). Launched on schedule in multiple countries in 2022.

SCSS CSS Fractal Handlebars HTML

React-Web-App

2017 - 2020
As a front-end developer in the Sevenval/Avenga team, I developed and expanded components of the React web app "wao.io" for configuration and real-time data visualisation of website optimisations.

React JavaScript Storybook CSS-in-JS

Native Web Themes

2025
Development of a parametrized WordPress white-label theme with skinning and tracking logic,
resulting in the successful migration of existing and quick setup of new portals for a renowned online service provider.

PHP JavaScript CSS Cypress Docker WP

Astro + React Web App

2025
Proof of Concept of a web app for an interactive presentation of IT textbooks. Quality assurance using Storybook, Vitest and Playwright. I published the specially developed front-end module hexagonal-masonry-placement as open source software on GitHub and npm.

Astro React TypeScript Tailwind Playwright

Maintenance and Development

In addition to long-term support for my regular clients, I have also taken over the maintenance of existing projects for new clients, such as Linuxhotel, a training and conference hotel.

This included improving loading performance and SEO, as well as extending and optimizing a complex, multilingual course scheduling system.

PHP Symfony WordPress JavaScript CSS

References and Testimonials: What my Customers say

Daniela, designer, Studio Lela:
Ingo brings together technical expertise and strong conceptual thinking. What stands out in particular is his ability to consistently find effective solutions to any problem. Last but not least, he is characterized by his strong commitment to sustainability.
Ingo, managing director and lecturer, Linuxhotel:
We particularly appreciate his ability to find pragmatic and sustainable solutions for complex legacy code.
Manuela, coach and founder, Twisted Connection:
We had good communication and alignment throughout the process. Ingo was agile in understanding my needs and setting expectations. I would totally recommend working with him!
Read more reviews on Google