Experience

NestFainder is a comprehensive location intelligence platform that helps users discover optimal cities for relocation based on personalized preferences. Built with a modern tech stack (Go, Python/FastAPI backend, PostgreSQL/PostGIS via Supabase, React/NextJS frontend), the platform integrates multiple data sources to provide real-time insights on 22000+ cities worldwide including their districts and neighborhoods.

The system features a sophisticated three-layer architecture: user preferences (25+ preference categories), dynamic filter translation with 67+ filter dimensions, and AI-powered personalization using the TOPSIS algorithm to score cities across 12 categories (cost of living, safety, climate, healthcare, lifestyle, etc.).

Key technical capabilities include geospatial analysis with PostGIS, pgvector for semantic search and AI-powered recommendations, dynamic content generation with LLM integration, Row Level Security (RLS) for multi-tenant data access, and comprehensive API endpoints for city search, filtering, and personalized recommendations. The platform serves users seeking data-driven location decisions for remote work, retirement, immigration, or lifestyle optimization.

infobud.ai is an AI-driven news aggregator that simplifies global news, offering customizable feeds in all languages for tailored insights into tech, finance, politics, and more. It provides precise, relevant news updates, overcoming conventional search tool limitations.

Due to the diversity of news sources, it provides precise and relevant news updates, focusing entirely on the facts without influencing opinion.

The all-in-one software solution to tokenize real world assets as a service on web3 technology in the most efficient way possible.

Tokenforge's 25+ clients are already using our solutions to tokenize venture shares, licence rights, energy infrastructure, real estate, financial products and more as a service. Our all-in-one-solution allows them to tokenize their business native assets easily, and enables them to SELL into primary markets, TRADE in secondary markets and AUTOMATE their business models. Tokenforge offers over 27 tokenization-as-a-service modules, and is adaptable to any business tokenization needs.

We built a emoney-based core banking system for eCommerce companies which enabled a reward-based payment-system for their customers. This company was successfully exited and later discontinued.

Building blockchain products & token ecosystems on Ethereum and other Chains, providing solutions for Smart Contract Interaction and (Crypto-) Payment in eCommerce Software. Providing our own Token-Sale- and Distribution-Platform.

Creating cross platform Apps for both iOS and Android with Flutter, React Native and real native code, building reliable, scalable Backends and REST APIs with Go and PHP relying on Postgres, MySQL and ElasticSearch databases.

Doing Technical Due Diligence's. Consulting Startups on their technical perspective. Working as Interims-CTO for many years.

Platform independent application development, managing Projects, Software Development, Technical Consulting. AWS-Consulting.

I'm consulting small and medium-sized companies (preferred Startups) in the technical areas of their business mostly for the following industries: eCommerce, Language Learning Tools, eHealth, Local Services. The scope of my consulting covers the technical aspects of building the full application stack starting with databases in the backend as well as frontend-related things for both mobile- and/or web-/desktop-environments.

Programming Languages, Platforms and skills:

YAIR is Blockchain secured digital solution for the global new media art market. Our gamified platform takes care of the distribution, authentication, preservation and trading of new media arts. Artworks of famous contemporary artists can be co-owned via our YAIR Tokens. A new Security Token asset class that allows users to invest in high end digital art assets.

Developing Smart Contracts on the Ethereum Blockchain. Currently we work together with EU-Lawyers bringing up Standards for Security Tokens, working together with the Ethereum Community and folks from openzeppelin.

As a blockchain and crypto currency enthusiast I consult lawyers, tax advisors and companies on these technologies. I help to build up knowhow around crypto currencies and blockchain from scratch. I am also a consultant, advisor and developer for ICOs especially for the Ethereum platform (ERC20).

With a team of specialists I've built an ICO-platform that is completely aligned with German law, backed by german ICO experienced lawyers. We offer all services along the whole ICO-process:

• legal framework with our (external) lawyers
• token economics
• token engineering / Smart Contract development
• webdesign for ICO sale platform / landing pages
• Sale platform including:

• Crypto payments (BTC, ETH)
• Fiat payments
• whitelisting
• Token reservation in Pre-Pre ICO phase
• ERC20 or ERC 721 based tokens
• vesting contracts for team related tokens
• referral-/affiliate program
• hosting (via external hosting company in Berlin)

Quote: This way we can support any ICO team for everything that needs to be done in order to do a successful Crowdsale, while the team itselfcan fully focus on its own product.

As CTO for Zizzle eLearning Inc. i am responsible both for the backend and the frontend of the application including iOS and Android-Apps. I built the whole backend with a small team including administration of users, customers and the administration of our app content like the Chinese characters and their describing stories and audio-files, also the payment and subscriptions of customers. Also i am responsible for development of our iPhone- and Android-Apps

At Yatego, in 2014 we started a new project called "Yatego Local" (www.yategolocal.com), building everything from scratch with modern technologies and agile methodologies.

As team lead for YategoLocal I was in charge of the development of app development as well the backend of the platform including various APIs (e.g. Facebook API and Cloudinary). Furthermore, I built the native iOS-part of the app and built the social media integration.

I was part of the refactoring team where the whole software stack of Yatego's eCommerce platform www.yatego.com has been rebuild. The main goal was to create a high reliable and high performance eCommerce platform for this large german marketplace, which has been achieved successfully.

With a team of 6 developers we built a web-based ERP software for the insurance sector. Besides the integration of finance-related interfaces and data imports like MT940 and DTAUS, I was responsible for performance optimizations, for both frontend and backend, particularly the Microsoft SQL Server database.

As the leading software developer for this eHealth Startup based in Düsseldorf (Germany) I was responsible for the development of the whole software stack.

With a team of 6 developers we built a web-based ERP software for the insurance sector. Besides the integration of finance-related interfaces and data imports like MT940 and DTAUS, I was responsible for performance optimizations, for both frontend and backend, particularly the Microsoft SQL Server database.

Member of the web application development team, responsible for the development of the real time auction system and several backend tools.

System-Development, Application- and Web-Development. OS: Windows, Linux. Languages: C++, C#, PHP.

My first adventure in software development was roster calculation software for hospitals.

The first customers were Klinikum Frankfurt (Oder) and Klinikum Straußberg (Germany).