Backend & Köln
The backend is the backbone of every modern application. The Freelancer Marketing develops secure, scalable REST & GraphQL APIs and full-stack API development with Node.js and Python – as a solid foundation for your frontend applications, mobile apps and integrations. We help businesses in Köln realize their digital vision.
- REST & GraphQL APIs
- Node.js / Python Backend
- Serverless Functions
- Authentication & Security
- Email Systems (IMAP, Nodemailer)
- WhatsApp & SMS Integration
Backend & API Development in Köln
Looking for a web designer or developer in Köln? The Freelancer Marketing delivers Backend & API Development for businesses in Köln and Nordrhein-Westfalen — from initial concept to successful launch. Benefit from personal support and cutting-edge technology.
Regional Market Knowledge
We know the digital market in Köln and develop solutions tailored to local requirements and competitive conditions.
Personal Consultation
Whether on-site in Köln or remote — as a freelancer, we're your direct contact without agency overhead.
Why The Freelancer Marketing for Köln?
- Experience with businesses from Köln and the surrounding area
- Personal support and short communication channels
- Cutting-edge technologies (Next.js, React, TypeScript)
- Transparent pricing and fast implementation
REST & GraphQL APIs
APIs are the interfaces through which your applications communicate. We develop both REST APIs according to OpenAPI standard and GraphQL APIs, depending on what is optimal for your use case.
Node.js & Python Backend
Node.js is our primary choice for performant, event-driven backend services. With Express, Fastify or NestJS we develop scalable server applications that work reliably even under high load.
Industries in Köln
Our Backend & API Development are particularly sought after by businesses in these industries in Köln:
About Köln
Why Köln is an exciting market for digital services
Köln ist Deutschlands TV- und Medienstadt — RTL, WDR und zahlreiche Produktionsfirmen sitzen hier.
Die Gamescom in Köln ist die weltweit größte Spielemesse und treibt die digitale Branche der Region.
Über 15.000 Unternehmen in Köln arbeiten im Bereich digitale Medien und Kommunikation.
Don't trust us*
*Trust them
Andy is a beast!! High-quality work in record time. His motion and graphic work is truly game-changing. Can only highly recommend him!
KASTLE AI
Andy is the real deal. Not just a Next.js pro, but he truly cares – brings ideas, polish and goes the extra mile. Creative, proactive and lightning-fast with QA.
WORK IS PLAY
Andy is a unique creative mind. He always comes up with impressive ideas and consistently delivers exceptional results. A Swiss army knife of content creation.
SIDE HIT FILMS
He's a chameleon. Andy's versatility is his superpower. From 2D animations to renderings and web design – his range is exceptional.
BOOMBOX
Professional collaboration from start to finish. Andy understands exactly what you need and delivers more than expected. Absolute recommendation!
NEXUS DIGITAL
The quality of his work speaks for itself. Punctual, creative and always willing to go the extra mile. A true partner.
STARTUP LABS
Our website got a complete upgrade through Andy. Modern technology, fantastic design and smooth implementation.
ARTISAN STUDIO
Andy brings fresh perspectives to every project. His technical skills combined with creative thinking make him the ideal partner.
PIXEL FORGE
FAQ: Web Development & Marketing in Köln
Why hire a freelancer instead of an agency in Köln?+
What technologies do you use for web projects in Köln?+
Can you redesign an existing website?+
How does the collaboration work?+
Backend & API Development in other cities
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Let's build
something amazing together.
Whether website, web app or complex IT system – I'll help you realize your digital vision .