22.10.2026 aktualisiert
100 % verfügbar
Lead Full-Stack & AI Engineer | React · .NET · Python (FastAPI) · LLM/RAG
Teningen, Deutschland
Deutschland +2
Bachelor of Engineeringinfo: Deutschland, Österreich, Schweiz
Über mich
Senior Full-Stack Engineer (13+ yrs exp) | React, .NET, Python, AI/LLM. Focus on SaaS architecture, micro-frontends & multi-tenant systems. Built 4 production SaaS products. Based in Germany (EU work auth). Available immediately for B2B/Contracts.
Skills
OpenAIKünstliche IntelligenzC#SaasPythonPostgreSQLNode.jsSoftware ArchitectureNext.jsSignalrTypeScript.NET CoreReact.jsLarge Language ModelsBackend
React Development
Full Stack Engineering
AI / LLM Integration
TypeScript Development
Cloud Architecture / DevOps
Backend Development
Database Management
Micro-Frontend Architecture
Mobile Development
Advanced experience in React-based applications, including Next.js, Redux, TypeScript, and modern frontend architecture patterns for scalable web platforms.
Full Stack Engineering
Full-stack development across frontend and backend systems using React, Node.js, .NET, and Python, including production SaaS and enterprise applications.
AI / LLM Integration
Practical implementation of AI features using OpenAI, Claude, and Gemini APIs, including multi-LLM systems, RAG-based solutions, and workflow automation.
TypeScript Development
Extensive experience with TypeScript in enterprise-scale applications, focusing on type safety, maintainability, and large-scale frontend architectures.
Cloud Architecture / DevOps
Experience with cloud-based deployment and infrastructure using Azure, AWS, Docker, and CI/CD pipelines (GitHub Actions).
Backend Development
Backend development using Node.js, Express.js, Python (FastAPI), .NET 8, and ASP.NET Core for API-driven and service-based architectures.
Database Management
Design and implementation of data models and storage systems using PostgreSQL, Redis, MongoDB, and SQL-based solutions.
Micro-Frontend Architecture
Hands-on experience with micro-frontend systems, including Module Federation and scalable frontend architecture design for multi-team environments.
Mobile Development
Cross-platform development using React Native for iOS, Android, and Windows applications.
Erfahrung
Berufserfahrungmehr als 10 Jahre
Freelancer seit2013
Sprachen
DeutschgutEnglischverhandlungssicherRussischMuttersprache
Projekthistorie
Entwicklung und Architektur von 4 SaaS- & Mobile-Produkten (Principal Contractor):
? SmartWMS (smartwms.one) — Multi-Tenant Warehouse SaaS
– Skalierbare Multi-Tenant-Architektur, RBAC, Echtzeit-Updates (SignalR).
– Tech: React, TypeScript, .NET 8, PostgreSQL, Stripe, Docker.
? InvoCore (invocore.eu) — German E-Invoicing SaaS
– DSGVO-konforme Plattform nach XRechnung- und ZUGFeRD-Standards.
– Tech: Python, FastAPI, Redis, Celery, XRechnung, ZUGFeRD.
? Nootee (nootee.com) — AI Content Automation SaaS
– Multi-LLM-Integration (OpenAI, Claude, Gemini) & RAG-System.
– Tech: Python, LLMs, RAG, Prompt Engineering.
? AstroLingua (astrolingua.com) — AI Mobile & Web App
– Cross-Platform Sprachlern-Plattform mit personalisiertem KI-Feedback.
– Tech: React Native, TypeScript, OpenAI API, Cloud Sync.
Enterprise SaaS platform used by 30,000+ healthcare professionals worldwide.
– Worked in a core engineering team delivering complex product features across the platform
– Participated in sprint planning and technical discovery with Tech Lead, Architect, Scrum Master, QA, and Product Owner
– Contributed to architecture decisions and estimation of complex features prior to implementation
– Implemented end-to-end high-complexity features across frontend and system layers
– Supported distribution of technical tasks within the team and assisted engineers with implementation decisions
– Acted as technical point of contact for multiple frontend and micro-frontend modules
– Contributed to cross-team micro-frontend architecture used across multiple product areas
– Participated in system-wide frontend refactoring and architectural evolution
– Contributed to shared React component system (Storybook-based design system) used across teams
– Supported onboarding and mentoring of junior engineers through hands-on guidance and code reviews
– Improved frontend performance and delivery efficiency (bundle size -40%, delivery speed ~+50%)
– Built real-time UI systems for live gaming platforms
– Optimized frontend performance for streaming environments