Fullstack Entwickler Freelance

About the Position

🇩🇪 🇬🇧

⚡ No more AI prototype chaos

Legacy modernization & making AI code production-ready – Freelance Fullstack Developer

Java, React, PHP – I take over unmaintainable legacy systems and chaotic AI-generated applications. Secure, scalable, and ready for real use.

🔹 Fixed price. 4-6 weeks delivery time. You keep the code.

Discuss project →
Unbinding Quick-Check of your code possible
What I do

🛡️ Legacy apps saved

🧠 AI Refactoring Specialist

💸 Fixed prices & clarity

Java 17+
React
PHP 8
Spring Boot
JavaScript/TS

❌ "Our AI prototype is not deployable"

❌ "Legacy PHP keeps crashing"

✅ Solution: Refactoring + modern React/UIs

My Specialties

▶ Home Page
▶ Java Legacy
▶ PHP to React
▶ AI Code Refactoring
▶ References

That which AI cannot do

I bring order to technical stagnation

No generic landing pages. But production-ready architecture for companies that solve real problems.

🏚️→🏗️

Legacy Modernization

Java 8, old PHP monoliths, or unmaintainable Ajax spaghetti? I migrate step by step to modern stacks (Spring Boot, React, Tailwind).

Java → Spring Boot
PHP → REST API
React Frontend

🤖→🧑‍💻

Making AI Code Production-Ready

Your AI-generated prototype has no auth, no logging, no tests? I build the missing backend & frontend around it and make it maintainable.

OpenAI Integration
Security & RBAC
Deployment Ready

Refactoring + React UI

You have an existing backend (Java/PHP) but an outdated interface? I design/implement a modern React UI – performant & accessible.

React + Hooks
State Management
Responsive Design

📌 My Promise: You only pay what we agree on. No surprises. No hidden hours. After 4-6 weeks, your system is running.

Honest Positioning

What you don't need from me

• ✖️ Generic AI landing pages without real benefit
• ✖️ Quick prototypes that die in production
• ✖️ Unmaintainable "copy-paste" code from chatbots
• ✖️ Pure web design without backend competence

Instead: Architecture, stability, and a UI that really works.

"I have already built 3 AI prototypes – none run in the cloud."

– That's exactly where I take over.

Concrete Results

From chaotic to production-ready

📉 Before: PHP monolith with 12k lines, no testing, constant failures.

📈 After: API-first architecture + React dashboard, failure rate -95%.

✓ Legacy modernization in 6 weeks

🤖 Before: AI-generated React app without backend – data only in localStorage.

⚡ After: Complete Java Spring API, PostgreSQL, JWT-Auth + clean UI.

✓ AI integration & production setup

AI & Your Fear – Plain Talk

"Doesn't an AI replace your work too?"

No. AI can build prototypes, but not production-ready systems with security, legacy databases, and domain-specific logic. That's exactly where I work – as an architect & problem solver.

"Why shouldn't I just hire a junior with ChatGPT?"

Because you end up paying twice: First for the prototype, then for me to fix it. I offer fixed prices for this exact scenario – cheaper than trial & error.

"You also do web design?"

Not just design. But as a fullstack developer with a sense for UI, I design modern React interfaces – including implementation, not just pixel painting.

About Me

Your technical sparring partner for difficult software projects

I support companies when legacy systems are slowing down or AI prototypes are not production-ready. Focus: clear architecture, robust implementation, and fast, understandable results.

Stack: Java, React, PHP, Spring Boot • Work style: pragmatic, transparent, production-oriented.

Project or Legacy?

Let's talk for 30 minutes for free – I'll analyze your legacy or AI problem.

Go to the inquiry form →

🔹 Fixed price? Yes, of course. Just ask.

or via LinkedIn / Xing – Contact on request