Alex Claes - Senior Full-Stack Developer

Q: Where is Alex based?

Alex is based in Hamburg, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Alex speak?

Alex speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does Alex have?

Alex has at least 20 years of experience. During this time, Alex has worked in at least 8 different roles and for 9 different companies . The average length of individual experience is 2 years and 3 months . Note that Alex may not have shared all experience and actually has more experience.

Q: What is Alex's latest experience?

Alex's most recent position is Senior Full-Stack Developer at Umbrella Organization of German Sports Clubs .

Q: What companies has Alex worked for in recent years?

In recent years, Alex has worked for Umbrella Organization of German Sports Clubs , Leading Live Entertainment Organizer , Manufacturer of a Digital Medical Device , Leading Coding Bootcamp in Germany , and Leading Food Retail Group in Germany .

Q: Which industries is Alex most experienced in?

Alex is most experienced in industries like Information Technology (IT) , Advertising , Media, and Entertainment and Publishing . Alex also has some experience in Healthcare , Food and Beverage , and Retail .

Q: Which business areas is Alex most experienced in?

Alex is most experienced in business areas like Information Technology (IT) , Product Development , and Marketing .

Q: Which industries has Alex worked in recently?

Alex has recently worked in industries like Information Technology (IT) , Media, Entertainment and Publishing , and Healthcare .

Q: Which business areas has Alex worked in recently?

Alex has recently worked in business areas like Information Technology (IT) , Product Development , and Marketing .

Recommended expert

Hamburg, Germany

Experience

Jan 2025 - Dec 2025

1 year

Senior Full-Stack Developer

Umbrella Organization of German Sports Clubs

Development of a CMS-based online platform as a central hub for multimedia brand communication, focusing on accessibility, web performance, and data protection.
Technologies: PHP, Craft CMS, Twig, HTML, CSS, JavaScript, Alpine.js, htmx.

Jan 2024 - Dec 2025

2 years

Senior Full-Stack Developer

Leading Live Entertainment Organizer

Development of a multi-tenant marketing platform for musical, theater, and concert tickets with a strong focus on highly customized UI theming based on the headless CMS Contentful.
Technologies: HTML, CSS, JavaScript, TypeScript, React, Next.js, Tailwind CSS, Contentful, Vercel, GraphQL API.

Jan 2023 - Dec 2024

2 years

Frontend Architect

Manufacturer of a Digital Medical Device

Development of a touchscreen application to assist and analyze physiotherapy training with live feedback from sensors.
Technologies: TypeScript, React, Tailwind CSS, Vitest, Cypress, Framer Motion, ECharts, XState, Storybook.

Jan 2022 - Dec 2022

1 year

Head Coach for Web Development Courses

Leading Coding Bootcamp in Germany

Conducting multiple courses teaching web development fundamentals.
Systematic revision and redesign of the curriculum.
Technologies: HTML, CSS, JavaScript, Git, React, Next.js, Jest.

Jan 2020 - Dec 2021

2 years

Frontend Architect & Next.js Coach

Leading Food Retail Group in Germany

Development of a B2C platform for the parent brand and all individual retailers, focusing on web performance and modularity.
Technologies: TypeScript, React, Next.js, Emotion, CSS, Docker, Jest.

Jan 2019 - Dec 2020

2 years

Senior Web Developer

Leading German magazine publisher

Developed a UI library and a data-driven multi-tenant rendering solution focused on modularity, scalability, accessibility, and web performance as a foundation for delivery on multiple B2C content platforms.
Technologies: CSS, Handlebars, Web Components, BackstopJS, Jest, Storybook, Koa, Lerna.

Jan 2017 - Present

9 years 3 months

Full-Stack Developer, Tech Consultant, Engineering Manager, Tech Educator

Self-employed / Freelance

Carried out full-stack development projects with modular, scalable, and high-performance architectures.
Advised on technical web development topics, cloud platforms, and CI/CD.
Coached web development from the basics to modern tools like React and Next.js.
Technologies: PHP, Python (Django, Flask, FastAPI), Node.js, TypeScript, HTML, CSS, JavaScript, AWS, Azure, Cloudflare, MySQL, PostgreSQL, MongoDB, Redis, REST, GraphQL, Storyblok.

Jan 2011 - Dec 2016

6 years

Web Developer; Senior Web Developer; Senior Developer & Tech Team Coordinator

Jung von Matt/next

Jan 2006 - Dec 2011

6 years

Year-long Internship

OGVIT Internet Technologies

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (15 years), Advertising (6 years), Media and Entertainment (4 years), Healthcare (2 years), Food and Beverage (2 years), and Retail (2 years).

Information Technology

Advertising

Media and Entertainment

Healthcare

Food and Beverage

Retail

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (20 years), Product Development (9 years), and Marketing (2 years).

Information Technology

Product Development

Marketing

Summary

I develop modular, scalable, and high-performance web applications based on well-thought-out architectures. In the backend, I offer solid expertise in PHP, Python, and Node.js. With this, I implement server-side rendering or robust API layers and integrate databases as well as other third-party systems. With an eye for detail, I put special emphasis on user-friendly UIs that focus on accessibility and progressive enhancement.

Thanks to broad practical experience from diverse collaborations, I help my clients understand technical challenges and make informed decisions. I provide strategic consulting and develop future-oriented, sustainable solutions that align with your long-term goals.

With experience in frontend, backend, operations, business, and design, I bring a holistic perspective to software product management. I focus on agile methods like Scrum and Kanban, prioritize lean approaches and clear requirement analysis.

Driven by a passion for learning and teaching, I offer hands-on coaching in web development, from the fundamentals to modern tools like React and Next.js.

Skills

Php
Laravel
Symfony
Drupal
Craft Cms
Typo3
Wordpress
Blade
Twig
Python
Django
Django Cms
Flask
Fastapi
Graphene
Node.js
Typescript
Express.js
Strapi
Apollo Server
Prisma
Mongoose
Ghost
Html
Css
Javascript
Web Components
Astro
11ty
Alpine.js
Vue
Nuxt
Htmx
Tailwind Css
Material Ui
Storybook
React
Next.js
Vercel
React Hook Form
React Router
Redux
Zustand
Jotai
Xstate
Swr
React-i18next
React Query
Radix Ui
Phpunit
Pytest
Jest
Vitest
Cypress
Playwright
Chromatic
Backstopjs
Cucumber
Jenkins
Gitlab
Github
Bitbucket
Azure Devops
Aws
Cloudflare
Azure
Mysql
Postgresql
Mongodb
Firebase
Redis
Rest
Graphql
Contentful
Storyblok
Docker
Emotion Css
Framermotion
Echarts
Koa
Lerna
Git

Languages

German

Native

English

Advanced

Education

Oct 2012 - Jun 2016

Northern Business School / Hochschule Wismar

B.Sc. Business Informatics · Business Informatics · Wismar, Germany

Oct 2008 - Jun 2011

OGVIT Internet Technologien

Media Designer for Digital and Print Media (Specialization in Design & Technology)

Profile

Created

January 2026

Need a freelancer? Find your match in seconds.

Try FRATCH GPT

Frequently asked questions

Do you have questions? Here you can find further information.

Where is Alex based?

Alex is based in Hamburg, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Alex speak?

Alex speaks the following languages: German (Native), English (Advanced).

How many years of experience does Alex have?

Alex has at least 20 years of experience. During this time, Alex has worked in at least 8 different roles and for 9 different companies. The average length of individual experience is 2 years and 3 months. Note that Alex may not have shared all experience and actually has more experience.

What roles would Alex be best suited for?

Based on recent experience, Alex would be well-suited for roles such as: Senior Full-Stack Developer, Frontend Architect, Head Coach for Web Development Courses.

What is Alex's latest experience?

Alex's most recent position is Senior Full-Stack Developer at Umbrella Organization of German Sports Clubs.

What companies has Alex worked for in recent years?

In recent years, Alex has worked for Umbrella Organization of German Sports Clubs, Leading Live Entertainment Organizer, Manufacturer of a Digital Medical Device, Leading Coding Bootcamp in Germany, and Leading Food Retail Group in Germany.

Which industries is Alex most experienced in?

Alex is most experienced in industries like Information Technology (IT), Advertising, Media, and Entertainment and Publishing. Alex also has some experience in Healthcare, Food and Beverage, and Retail.

Which business areas is Alex most experienced in?

Alex is most experienced in business areas like Information Technology (IT), Product Development, and Marketing.

Which industries has Alex worked in recently?

Alex has recently worked in industries like Information Technology (IT), Media, Entertainment and Publishing, and Healthcare.

Which business areas has Alex worked in recently?

Alex has recently worked in business areas like Information Technology (IT), Product Development, and Marketing.

What is Alex's education?

Alex holds a Bachelor in Business Informatics from Northern Business School / Hochschule Wismar.

What is the availability of Alex?

Alex is immediately available full-time for suitable projects.

What is the rate of Alex?

Alex's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.