Senior Fullstack Developer | Java, Spring Boot 3 & React (TypeScript)

Senior Fullstack Engineer & Founder. Expert in Java (Spring Boot), Node.js & React. I build scalable SaaS & AI-driven RAG pipelines (Ollama/Postgres). Focus: Enterprise Security, GDPR & Clean Code. Delivering rapid, high-impact business value.

• Cyber Security
• DevOps & Server Administration
• Docker & Containerisierung
• E-Commerce Schnittstellen (Stripe/PayPal)
• Mongodb
• Node.Js
• Python
• React (JavaScript library)
• Softwarearchitektur
• Spring Framework

Senior Fullstack Engineer & IT EntrepreneurI bridge the gap between stable enterprise logic and modern AI innovation. With over 8 years of experience, I specialize in building scalable, secure systems using Java (Spring Boot 3), Node.js, and React.Key Achievement:

I independently architected and deployed a production-ready E-Commerce & Logistics Engine.Core: Java 17 backend with JWT security and a high-availability MongoDB architecture.

Logistics: Integrated a custom Shipping Engine featuring live-tracking functionality, managing real-time data flows and third-party carrier orchestration.Frontend: React/TypeScript with TanStack Query for high-efficiency state management.Operations: End-to-end Stripe/PayPal integration and Docker-based deployment.

The AI Edge: I implement RAG pipelines and LLM integrations (Ollama/Postgres), allowing companies to interact with their private data securely. I deliver clean, GDPR-compliant code designed for scale.

Technical Proficiencies
1. Backend & ArchitectureJava Ecosystem: Spring Boot 3, Spring Security (JWT/OAuth2), Spring Data MongoDB, JPA/Hibernate.API Design: RESTful APIs, OpenAPI (Swagger), Microservices, Maven/Gradle.Node.js/Python: NestJS, FastAPI, SQLModel.

2. Modern Frontend StackCore: React (Vite), TypeScript, TanStack Query (React Query).Styling & UI: Tailwind CSS, Styled Components, Responsive Design.State Management: Redux, Context API.

3. DevOps & Cloud (The "Professional" Touch)Containerization: Docker & Docker Compose.CI/CD & Tools: Git (GitHub/GitLab), CI/CD Pipelines, Postman.Methodology: Agile/Scrum, Jira.

4. E-Commerce & Financial LogicPayments: Stripe API, PayPal Integration, Payment Gateways.Data Handling: PostgreSQL, MongoDB (BSON), Redis (Caching), JSON.