Jan 2026 – Jan 2026 · 0 mo

Jan 2024 – Dec 2025 · 1 yr 11 mos · Berlin, Germany · Hybrid

• infobud.ai revolutionises sales success through AI-supported market intelligence. The platform analyses global data to inform companies about relevant market changes at an early stage. By identifying sales triggers, it enables a personalised customer approach at the optimal time.
• infobud.ai provides unbiased insights from various sources that reveal previously unnoticed influencing factors. This enables sales teams to act proactively, capitalise on opportunities and significantly increase their success. The easy-to-use solution gives companies a decisive competitive edge in the fast-moving business world.
• infobud.ai is the ideal tool for sales units (New Sales, Account Management, Business Development) that want to stay one step ahead of the market and their competitors.

Dec 2023 – Jan 2026 · 2 yrs 1 mo · Berlin, Germany · Hybrid

• Revolutionizing News with AI-Powered Precision
• As the Founder and CTO of Infobud.news, I built an AI-driven news aggregation platform designed to cut through the overwhelming flood of global information and deliver validated, bias-free, and highly relevant news in multiple languages.
• Traditional news platforms struggle with fragmented sources, misinformation, and overwhelming content volumes. Infobud.news solves this by employing advanced AI models that:
• Aggregate news from global sources in multiple languages
• Assess authenticity and filter out misinformation
• Generate concise, unbiased summaries
• Personalize content based on user preferences

Jan 2023 – Aug 2023 · 7 mos

• Co-Author and technical Co-Architect of the ERC-7551, a Crypto Security Token Smart Contract Interface.
• This ERC was created by the members of the German Federal Association of Crypto Securities Registry Administrators to comply with the requirements of the so-called German Electronic Securities Act (German: "Elektronisches Wertpapiergesetz" = "eWpG") and to establish a standard for Security Tokens that adhere to the law.

Jun 2022 – Dec 2023 · 1 yr 6 mos

• Technical Architect and Co-Author of ERC-7570: Security token interface for confidentiality and legal status transparency to crypto security tokens, according to #eWpG
• More Information cn be found here: https://github.com/ethereum/ERCs/pull/143

May 2021 – Apr 2024 · 2 yrs 11 mos

• Consulting the team regarding Blockchain technology, Smart Contracts development, Engineering in general, system architecture, Avalanche SubNets, infrastructure

May 2021 – Dec 2023 · 2 yrs 7 mos

• The all-in-one software solution to tokenize real world assets (RWA) 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, license 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. It 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.

Nov 2022 – Present · 3 yrs 4 mos

Feb 2020 – May 2021 · 1 yr 3 mos

• My Key Responsibilities:
• Leadership and Team Management:
• Led a skilled team of 5 software engineers and DevOps specialists
• Fostered a collaborative environment to innovate and implement effective solutions
• Payment System Development:
• Engineered a robust and high-performing eMoney-based payment system
• Ensured system reliability and efficiency to handle high-volume transactions
• Cloud-Native Microservice Architecture:
• Led the development of a cloud-native microservice architecture
• Utilized Go for backend development and Kubernetes for container orchestration and scalability
• Bank Account Management:
• Implemented secure and efficient bank account management features
• Facilitated seamless integration with banking systems for account handling
• Wallet Management:
• Developed a comprehensive wallet management system for eMoney accounts
• Focused on user-friendly interfaces and secure transaction processing
• Intra-System Payments:
• Enabled payments between eMoney accounts, ensuring fast and secure transfers
• International Transaction Handling:
• Managed PayIns from SWIFT into the eMoney ecosystem
• Managed PayOuts from the eMoney ecosystem to SWIFT, ensuring compliance and efficiency
• Refunds and Disputes:
• Developed systems for handling refunds and managing disputes
• Focused on customer satisfaction and dispute resolution efficiency
• Know Your Customer (KYC) Compliance:
• Implemented and managed KYC & UBO processes
• Ensured adherence to regulatory standards and customer identity verification
• Achievements:
• Successfully led a team to build and maintain a cutting-edge eMoney payment platform
• Achieved notable improvements in transaction processing time and system reliability
• Enhanced customer satisfaction through efficient dispute resolution and secure transaction processes

Aug 2017 – Dec 2019 · 2 yrs 4 mos

• As CEO/CTO at ITInance GmbH, I lead the development of innovative blockchain products and token ecosystems, utilizing Ethereum and other chains. My expertise encompasses smart contract interaction, crypto-payment solutions in eCommerce software, and managing our own token-sale and distribution platform.
• Developing Smart Contracts on the Ethereum Blockchain
• Collaborating with EU-Lawyers to establish standards for Security Tokens
• Consulting on blockchain and cryptocurrency for lawyers, tax advisors, and companies
• Building and advising ICOs, especially on the Ethereum platform (ERC20)
• With my team, I've built an ICO platform ("pre-STO") aligned with German law, encompassing all aspects of the ICO process, including legal frameworks, token economics, smart contract development, web design, and hosting.

May 2011 – Jan 2020 · 8 yrs 8 mos

• I have a strong background in creating cross-platform apps for iOS and Android with Flutter, React Native, and native code, developing reliable and scalable Backend systems using Go, NodeJS and PHP. Our solutions are built on robust databases like Postgres, MySQL, and ElasticSearch.
• In addition to my technical roles, I perform technical due diligence and offer startup consulting, particularly focusing on technical strategies. My consultancy targets small and medium-sized companies, with a preference for startups in eCommerce, language learning tools, eHealth, and local services.
• Since 2016: 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.
• Programming Languages, Platforms, and skills:
• Go
• Dart
• Objective-C
• Swift
• PHP
• TypeScript
• C++
• C
• C#
• ReactNative
• Symfony (Framework)
• PostgreSQL
• MySQL
• Sqlite3
• Elastic Search
• MongoDB
• NodeJS
• AWS Lambda
• AWS S3/Cloudfront
• Firebase

Jan 2011 – Dec 2023 · 12 yrs 11 mos

• Overview:
• As a Senior Backend Developer, I specialize in designing, building and consulting on robust, scalable Backend Systems for eCommerce, payment systems, search, and LLM-based applications. My expertise lies in utilizing a diverse array of programming languages and databases to create efficient and reliable solutions.
• Key Responsibilities:
• 1. Backend Development for eCommerce and Payment Systems:
• Design and implement backend systems using Go and PHP
• Ensure systems are scalable, reliable, and optimized for high performance
• Work extensively with databases such as PostgreSQL, MySQL, and ElasticSearch to manage and secure data effectively
• Large Language Models (LLM) Application Development:
• Develop and fine-tune applications powered by advanced Large Language Models.
• Implement Retrieval Augmented Generation (RAG) techniques to enhance model outputs.
• Manage Embeddings and Vector Databases, contributing to the growing field of LLMOps.
• 2. Database Expertise:
• Serve as a PostgreSQL expert, optimizing database performance and security.
• Ensure data integrity and efficient data retrieval across multiple database platforms.
• 3. Cross-Platform Application Development:
• Create versatile cross-platform applications for iOS & Android.
• Utilize Flutter and React Native for seamless mobile app development.
• Integrate native code to enhance application performance and user experience.
• 4. Skills and Technologies:
• Languages: Go, PHP, C, C#, TypeScript, Solidity
• Databases: PostgreSQL, MySQL, ElasticSearch, TypeSense, Meilysearch
• Application Frameworks: Flutter, React Native, Symfony, NestJS, Quasar Framework
• Specialties: LLM Integration, RAG, Database Management
• Objective:
• I aim to leverage my extensive experience in backend development and Large Language Model integration to contribute to innovative projects, focusing on creating high-quality, user-centric applications and systems that push the boundaries of digital commerce, information and technology.

Nov 2018 – Present · 7 yrs 4 mos · Berlin, Germany · Hybrid

• Performing Tech Due Diligences for top VC's and startups for Series A, B and C and M&A transactions.

Jun 2018 – Dec 2019 · 1 yr 6 mos · Berlin Area, Germany

• 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.

Jan 2018 – Oct 2018 · 9 mos · Memmingen

• For german cleyond AG and its CYO token i am consulting the Board helping out in the whole complex process regarding their ICO: team building, token economics, crypto currency consulting and smart contract development.
• I've created their non-fungible ERC-721 token on the Ethereum blockchain and all smart contracts which are necessary to run the token sale and keep the funds secure. With my team we also developed the whole ICO sale platform aligned with German/EU Law including payments on Crypto side and fiat money also.

Apr 2016 – Dec 2019 · 3 yrs 8 mos · Salt Lake City, USA

• 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
• http://www.zizzle.io

Jan 2014 – Dec 2015 · 1 yr 11 mos

• 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.
• Technical specialties:
• PHP 5.5
• Objective-C
• Javascript
• Test Driven Development (very high coverage)
• MySQL (Percona) 5.6, Liquibase
• ElasticSearch
• Symfony 2, PHPUnit, Bootstrap, Kiwi
• Node, npm, Bower, Composer, Grunt
• Vagrant, Puppet
• Facebook SDK
• Factual SDK
• Cloudinary
• Google Places API
• Titanium AppCelerator
• Kiwi (TDD for native iOS Apps written in Objective-C)
• JasmineJS

Mar 2013 – Dec 2013 · 9 mos

• 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.
• Technical specialties:
• PHP 5.5
• Javascript
• Test Driven Development (very high coverage)
• MySQL (Percona) 5.6, Liquibase
• ElasticSearch
• Symfony 2, PHPUnit, Bootstrap, Kiwi
• Vagrant, Puppet

Sep 2012 – Dec 2014 · 2 yrs 3 mos · Meerbusch, Germany

• selectr.me was the most easily operated Facebook Friend & Friendlist Manager. It was recommended by german youth radio stations, large news papers, wide-reach blogs and the online medium of the "Tagesschau".
• Note: the project was shut down in 2014 because Facebook deleted necessary API-endpoints for managing its friendlists.

Jun 2012 – Dec 2016 · 4 yrs 6 mos · Starnberg

• With a small team the web portal http://www.dein-bauernladen.de has been build and published under my direction. The portal is germanys biggest directory of local farmer shops and gives them visibility in the internet. I developed the backend of dein-bauernladen.de as well as the native iOS-App.
• The core system of the portal is also used as a white-label solution with multi-client capabilities from other companies and drives several industry portals in the DACH-region.
• My technical competencies:
• Symfony 2
• MySql 5.6
• PHP 5.6, Javascript, LESS
• Objective-C, ReactNative
• Composer, Puppet, Vagrant, Grunt, Bower, NPM
• geographical circumcircle search
• dealing with APIs from Google, Geonames, Facebook, Twitter, Factual and many more
• SEO optimization
• high performance web application / high performance database
• AWS-Components: S3, EC2 and Cloudfront
• Cloudinary
• native iOS Apps

May 2011 – Mar 2013 · 1 yr 10 mos · Cologne Area, Germany

• 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.
• Technical skills:
• C# / ASP.NET
• Javascript, Coffeescript
• Microsoft SQL Server

Jan 2011 – Feb 2012 · 1 yr 1 mo · Meerbusch, Germany

• As the leading software developer for this eHealth Startup based in Düsseldorf (Germany) I was responsible for the development of the whole software stack.
• The software stack can be summarized with the following components:
• database (MySql)
• backend (PHP)
• frontend (JavaScript, HTML)
• APIs
• data imports/-exports
• Apps
• Testdriven development for both backend and frontend

Nov 2008 – Apr 2011 · 2 yrs 5 mos · Düsseldorf

• (Note: this company has been acquired by Amakura GmbH, my next position)
• 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.
• Technical skills:
• C# / ASP.NET
• Javascript, Coffeescript
• Microsoft SQL Server

Feb 2007 – Oct 2008 · 1 yr 8 mos · Cologne Area, Germany

• I was member of the web application development team and amongst other things responsible for the development of the real time auction system and several backend tools.
• Web Application-, Libraries- & Database Development (LAMP)
• Linux, Apache, MySQL, PHP

May 1998 – Jan 2007 · 8 yrs 8 mos

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

Jan 1994 – Jan 1998 · 4 yrs · Berlin

• Software Developer for Clinical Purposes, Duty Roster Calculation (Delphi, Assembler, C++)