• Delivered internal (Scene Generation, Text Generation) and consumer-facing (Product Chat) AI agents using RAG, vector databases (FAISS), OpenAI, LangChain, and PydanticAI
• Developed an event-driven product management system with real-time synchronization to Shopify, enabling seamless updates for products and AI-classified images
• Integrated a Shopify-based e-commerce platform using Liquid templates for frontend customization
• Built customer-service features, integrated marketplaces (eBay, Etsy, Amazon), and developed a Progressive Web App (JavaScript-based frontend)
• Provided business IT consulting by introducing modern tools and automations (development, ETL, deployment, monitoring)
• Designed and operated Kubernetes clusters (Calico, MetalLB, Ingress, Rook-Ceph, Kafka, PostgreSQL) on Hetzner Cloud and on-premise to host core services
• Implemented comprehensive cluster monitoring, tracing, and metrics with Prometheus, Grafana, Loki, Tempo, OpenTelemetry, and Beyla
• Coached new team members in concepts, AI/ML practices, and effective use of LLM agents and tools

• Distributed microservices-based system designed and developed for automated corporate audit processes
• Lightweight components implemented to run independently on client systems, collecting and evaluating audit-relevant data states
• Alerting system built to notify customers of audit issues, with centralized servers generating reports and visualizations for external auditors
• Resilience achieved through components able to handle high loads and network disruptions (offline operation without data loss)
• Storage and data management improved with MinIO and cloud storage solutions (AWS, GCP)
• PostgreSQL database designed and administered, including performance tuning, backup strategies, data archiving, and monitoring

• Migration of microservices from Python 2.7 to Python 3, and fromJava to Python
• Development of asynchronous microservices in Java, Groovy and Python
• REST API and GraphQL server development
• Migration of monolithic applications to microservices, including DevOps support
• Migration of finance reporting system from Python2 to Python3 and to AWS Cloud
• Documentation created and maintained for new and migrated services
  

• Developed Spark-based solutions to process CAN-Bus data (BLF, DBC, MDF4.x) from Emergency Brake Assist and Lane Assist systems for graphical analysis
• Designed and implemented distributed Spark jobs to parse, serialize, and classify terabytes of raw sensor data
• Developed large-scale PySpark pipelines based on engineering requirements for preprocessing, aggregation, and transformation of automotive safety data
• Implemented alerting and trigger mechanisms based on Spark-processed real-time and historical driving data
• Developed scalable software and cloud-based pipelines on AWS for storage, processing, andanalysis of safety-related data

• IoT platform developed to simplify cross-platform integration of consumer devices and services
• Cloud connectors designed and implemented for manufacturers including Bosch/Siemens (BSH), Osram, Philips, Netatmo, and Regardia
• Asynchronous, microservices-oriented architecture built with Vert.x and Grails, supporting horizontal scalability and high availability
• Platform deployed on Kubernetes (GCP) with Docker, CI/CD pipelines in Concourse and Jenkins
• Data security requirements implemented to meet enterprise-grade standards
• Interoperability ensured across heterogeneous devices and vendor clouds via the MOZAIQ cloud marketplace
• Infrastructure as Code practices established for scalable deployments
• Development performed in Scrum team with Java, Groovy, and Python, including automated tests with Spock and pytest

• For a Lead generation company prototype and develop an ERP system
• Development of system for Lead collection, proccessing and statistic
• Development of Ergonomic GUI based on Bootstrap (CSS Framework) for Customers and Company Managers

• Migration of existing system to new technology stack (PHP)
• Database Modeling
• Database migration to new Model
• ORM Model
• Development of business logic
• API
• High-availability cluster and Hosting solution
• Team coordination

• Development of a software and operations platform for lead collection, processing, and statistical reporting
• Development of a responsive UI based on Bootstrap (CSS) for customers and company managers
• Coordination of internal and external staff (IT, UX)

• System Technical Design/ Architecture
• Database Modeling and ORM Model
• Migration of an existing (Apache, PHP-based) system to a new technology stack
• Data migration to the new database model in production
• Development of business logic
• API integration with multiple foreign partners
• High-availability cluster and hosting solution

• For a global oriented customer in e-commerce segment based in Cologne, Germany.
• To develop an Online-Shop and Backend system with focus on Product SEO, light weigh interface, speed, with responsible HTML5 Layout. 
• My client had been sold to other countries as only DE and EU and would like to adapt all the system and simplify the process of product publishing. 
• The Front of the Shop should be  internationalized and localized (Different languages, different currencies, different warehouse and the taxes management).

Important specification points contain:

• One Product Database with most important unique attributes
• Localized Product Database additionally localized attributes
• More than one logical fronted with possibility to redefine: layout, sales process, payments, taxes etc. for full localization and internationalization
• It should allow implement new frontends, for example for Asia Market (modular)
• Start Skins for DE(German), RU, SP, and EU(English) Countries.
• Back-office to manage products, sales and customers.
• Migration/integration of all orders and customers from current system.
• The Shop should generate the most important (need for publish) descriptions from the attributes (see 1.)

• Managing of growing IT infrastructure
• Team coordination and planning of failsafe IT and software projects
• Execution of tenders and procurement processes
• Negotiating with suppliers, quality control, documentation
• Responsibilities for the IT Budget (millions of EUR)
• Managing of a team till 15 person

• Planing and Integration of Enterprise Resource Planning System (ERP)
• Process optimization and automation inside the company
• Successful office relocation (250 persons) without any work interruption
• Assistance in the launch of the IT infrastructure of the resort in 2014 - 2015 (HTML on request)

Customer is Creative Solutions LLC is a new startup with investors capital. Building of public Geo Information Service with  open Sign Up. A Web Portal (mymir.org) with possibility to buy a sectors, village, city or country on the Real Planet and pay by credit card or PayPal. System should allow to do some modification on own Sector like change a color, overlay a photo give a name and some other features.  System should be horizontally scalable Geo Information System Application. System should be more independent from global technical services and implement services like DNS and Email.

• Planing of features and create specifications
• Software Development in Python
• Create a full working prototype
• Integration of Java Software (GeoServer.org)
• Coordination of small remote Team of 1x Designer, 2x Developer, 1x UI/JS Dev.
• HTML on request

Startup company founded 2011  in order to dominate the market in the remarketing, geo targeting, RTB (DMP, DSP, SSP) and CashBack Service. Company with ca. 60 employees end of 2013. (5 employees at the beginning). IT Department contains: 5 ? Developer, 3 ? Support, 2 ? Designer, 2 ? Network Engineer. Developed a  AdServer components: Parsing + error correction  in  big XML files for High Loaded and High Available environment with features like: manage millions of database records, images, videos, and price management. System is in use for Ads Banner serving, Geo,- Local Targeting, and image generation.

• Software development with Grails/Groovy/Java and Python/Pyramid/zope
• Building of Highly Available infrastructure with several access providers BGP (Border Gateway Protocol).
• Developing and Hosting of high available services based on technology stack like Memcached, PostgreSQL, MongoDB, Nginx, Varnish et cetera
• Using clouds, Virtual Machines (VM), Content Delivery Networks (CDN)
• Project management / Leading projects
• Provide RESTful API for mobile devices iOS, Android and other Third party
• Coordination / Development of security concept and integration
• Outsource management, negotiating with suppliers and quality control
• Coordination of project Team (developers, tech-support and designers)
• Managing of a team till 12 person
• Using also Grails, Groovy, Python, Java, HTML, CSS, JavaScript, Flash
• Working in a Scrum team
• Infrastructure as Code

Achievements: 

• Launch a Display platform targeting/retargeting (re-marketing) ? B2B 
• Launch a Affiliate Platforms ? B2B 
• Launch a Loyalty platform ? B2C 
• Developed and launched Local/Geo Targeting 
• Organized processes between deferent departments by software integration 
• ERP (Work-flow, Sales, Human Resource, Project System) also version control, bug-tracker, HelpDesk. 
• Development of e-commerce platform providing XML/JSON RESTful API for integration of mobile applications (OSx, Android), foreign finance software, and CRM.

• Choosing of technologies for the start-up project
• Planing and Development IT infrastructure working prototypes
• Planing and Development of working software prototypes
• Selection and recruitment of staff
• Preparing to scale up the business by integration of collaboration tools

positiv-Multimedia GmbH is a Web Agency focused on website development, design, social media and hosting with ca. 10 employees.

• Development with Python, Zope, Plone, HTML/CSS, JavaScript, XML, PHP, MySQL, Postgresql, ZODB, Mercurial, SVN Server administration (Linux)
• Optimization for SEO and Social Media apps Monitoring and Testing (UNIT, Functional, Speed and Integration), Munin, Nagios 
• Full responsible for IT-Security and availability of hosting solution

Achievements:

• Building and Launching over 30 Websites in a Team.
• Building a hosting solution for Web Systems/Sites Hosting including monitoring, test and automatic deployment
• Integrate HelpDesc, Bugtracker, CRM and Project management systems
• Reduce hosting costs to 60% by integration own hosting platform

• Plan and develop online-shop for cosmetic industry in MySQL, Zope2, Python.

• Design and develop of hight frequency visits multimedia-portal for sports industry (Universum Box-Promotion). 

• The biggest Tour operator (location Cologne, Germany) for millions of russian Speaking people in the EU. Online-shop still in original HTML on request.
• Development of CMS with comfortable system of in-line editing of the content and booking and traveling management.

• Online-shop still in original https://www.express-kniga.de with responsible design modifications. 
• First FullStack Development Project: Consulting, Planing, Modeling, Frontend, Backend, Hosting, Backoffice, Monitoring, Cache.