Frontend
- Javascript/TypeScript
- React
- Next.js
- Tailwind CSS
- Livewire
Niclas Wunder
Freelance AI Engineer & Senior Fullstack Developer based in Stuttgart
I help businesses across Germany remotely with AI systems and custom software – from technical architecture to reliable operations. As a former CTO, I bring over seven years of experience delivering senior fullstack work.
- Python
- PHP/Laravel
- Javascript
- React
- AI/LLM
- DevOps
About me
Background & Expertise
I've been building software that works in production for over seven years.
As a freelance AI engineer and senior fullstack developer, I pair whole-stack technical understanding with clear, direct collaboration.
Technical skills
Tech Stack & Expertise
I work with modern, proven technologies across the entire stack. Constantly learning and adapting.
Backend
- Python
- Node.js
- PHP
- Laravel
- FastAPI
- Django
- Express
Database
- PostgreSQL
- MySQL
- Redis
- MongoDB
- Vector DBs
DevOps & Infrastructure
- Docker
- AWS
- Azure
- GitHub Actions
- CI/CD
AI
- LLM Integration
- RAG Systems
- LangChain
- LangGraph
- Agentic AI
Recent work
Selected Projects
A selection of projects I have led or helped shape.
Internal Multi-Agent System with AI Chatbot for a German Automotive Group
Internal tool for employees of a large German automotive group that delivers insights from various data sources based on a multi-agent architecture – with a chat interface and real-time streaming.
Result
AI-based analytics tool with a multi-agent architecture for data-driven decisions
RAG Chat Assistant for School Knowledge Management
Production AI chat on top of internal wiki content and legal reference documents – with cited sources, hybrid search, and streaming answers for teachers.
Result
Production RAG assistant used daily by teachers for internal policies and legal questions
AI-Powered Market and Location Analysis for Self-Storage Expansion
Custom application for nationwide location analyses with competitor data, prices, travel times, demographics, and AI-powered market assessment.
Result
Location research shortened from several days to a few minutes and replaced data-tool subscriptions worth several thousand euros per year
verhinderungspflege.de – SaaS Platform for Care Benefit Applications
Tailor-made SaaS platform that helps people in need of care apply for respite care benefits from health insurance providers – replacing a no-code solution.
Result
Complete redevelopment replacing the no-code solution, with AI-powered document processing
Trinkgut – Internal Rental and Ordering System
Internal administration tool for fully digitalizing the rental process for event equipment at a Trinkgut beverage store.
Result
Complete digitalization of the rental process – eliminating paperwork and double bookings
Platform Rewrite for a Care Supplies Provider
Complete rewrite of a platform for a digital care supplies provider – from the data architecture to the CI/CD pipeline.
Result
Complete platform rewrite with a new data architecture for better extensibility
Building a Full-Featured Real Estate Marketplace
Building a full-featured real estate marketplace for a leading property portal – from OpenImmo integration and geo search to a broker interface with a billing system.
Result
Full-featured real estate marketplace for a platform with 400,000+ monthly visitors
SaaS Platform for Legally Compliant Rent Increases
SaaS platform that enables landlords to carry out rent increases in a legally compliant and fair way – complex legal requirements translated into user-friendly software.
Result
Production SaaS platform with a legally compliant calculation algorithm and automated document generation
Land Price Calculator for a Real Estate Portal
Django-based microservice for calculating land prices by city in Germany, based on BORIS data and proprietary data collection.
Result
Proprietary price calculation model with an API for internal and external users
What others say
Testimonials
Feedback from clients and partners I have worked with on various projects.
"Niclas understood our idea immediately and translated it into a well-thought-out, stable application. The communication was clear, the implementation fast, and the result fits our requirements exactly. This is what you want software development to be like."
Aljoscha Dumeier
CEO & Co-founder
Pflege im Karton
"With Niclas, we found a partner who quickly and deeply familiarized himself with our technically complex requirements. The technical implementation was clean, the collaboration reliable and uncomplicated. Our platform works exactly as we imagined it."
Julian Rusche
CEO
Verhinderungspflege
"Niclas created a new website for us in no time that achieves our goals and delights our customers. The communication was transparent and professional. We are very satisfied and recommend Niclas to anyone who needs a professional and reliable website."
Arthur Kahlkopf
CEO
Werbestudio
"Thank you very much, Niclas, for the great support in automating the receipt matching. We also gained many great insights from the ChatGPT automation workshop. Gladly again! I can recommend him without hesitation."
Sobair Barak
CEO
UpSell Software
Let's talk
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Whether you have a concrete requirement or an early idea, let's find out whether and how I can help.
Discuss an AI system or custom software project.
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