• Building an e-commerce platform based on Shopify using Liquid templates
• Product managment software with import/export to shopify platform

• Feature development for compliance and auditing software, focusing on improvement and code quality. 
• Responsibilities included implementing new features, refactoring the Python codebase, and upgrading to newer Python and library versions. 
• Flow up of SAP project (05/2019 - 12/2022)

• Enhanced specialized microservices-based server applications to evaluate data from battery test benches and successfully migrated systems to the cloud.

SAP is a German multinational software company headquartered in Walldorf, Baden-

Württemberg. It specializes in developing enterprise software to manage business operations and customer relations.

• A microservices-based distributed software system for automating corporate audit processes was designed, developed, and deployed. 
• Standardized, lightweight software components were implemented to operate independently within different departments (on client systems), where data states required for audits were collected and analyzed. 
• Alerts about audit-related issues were sent to customers, while centralized server components were used to generate reports and provide visualization for external auditors. 
• All components were designed to handle high loads and network disruptions without data loss.

Skoobe operates a popular subscription service within a large-scale infrastructure. The stack includes mobile apps (Android, Apple), REST APIs, databases, monolithic applications, and microservices. Skoobe GmbH is a member of the Tolino Alliance.

• Migration of microservices from Python 2.7 to Python 3, and from Java to Python 3

• Development of microservices in Python (asynchronous) and Java

• Development of REST APIs

• Development of GraphQL servers and APIs

• Support during the migration of monolithic applications to microservices, including DevOps support

• Writing and maintaining documentation

Processing data from Emergency Brake Assist and Lane Assist systems: 

• Developed software to process CAN-BUS files (BLF, DBC, and MDF 4.x) for future graphical analysis. 
• Buses and trucks collect data and store it in AWS S3 storage (terabytes).
  • serialize and classify tarabytes of raw data
  • create alerts and triggers based data
  • migrate software from hardware intern servers to AWS cloud.

Skoobe operates a popular subscription service within a large-scale infrastructure. The stack includes mobile apps (Android, Apple), REST APIs, databases, monolithic applications, and microservices. Skoobe GmbH is a member of the Tolino Alliance.

• Migration of microservices from Python 2.7 to Python 3, and from Java to Python 3

• Development of microservices in Python (asynchronous) and Java

• Development of REST APIs

• Development of GraphQL servers and APIs

• Support during the migration of monolithic applications to microservices, including DevOps support

• Writing and maintaining documentation

• 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.

Important specification points contain:

• 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

• 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.)

Developed an online shop and backend system (web application) as part of a small team, with a focus on product SEO, a lightweight interface, quick response times, and a generic responsive HTML5 layout. The company operates worldwide and aimed to adapt the entire system while simplifying the process of product publishing. The front end of the shop was designed to be internationalized and localized, supporting multiple languages, multiple currencies, multiple warehouses, and tax management. The project required close collaboration within the small team to ensure seamless integration and efficient implementation.

• A single product database with the most important unique attributes, along with a localized product database.
• Localization of layout, sales process, payments, taxes, and other features to enable full internationalization.
• Modular design allowing the implementation of new frontends, for example, tailored to the Asian market.
• Initial themes (skins) for DE, RU, SP and the rest of the EU (in English).
• A back-office system to manage products, sales, and customers.
• Migration of all orders and customer data from the current system to the new platform.

Public limited company with 250 employees and ca. 10-15  persons in the IT.  The Company manages a large-scale tourism cluster like http://arhyz-resort.ru/ development project in Russia. The IT is responsible for IT Infrastructure and mostly outsourced  software projects.

• 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

Achievements:

• 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.