Elena Krukenberg

Full-time, project-based AI Engineering programme focused on building and evaluating production-oriented LLM applications. Built end-to-end applications using Python, FastAPI, LangChain/LangGraph, RAG, tool calling and systematic LLM evaluation, with a focus on retrieval quality, security, observability and cost. Selected projects: German Tax Assistant · AI Interview Coach

Worked on the development and modernisation of momox's ReCommerce platform, with a focus on system modernisation, integrations, checkout and platform migrations. engagement tools onto a single platform and building the required integrations and data flows. • Shopify Migration: Contributed to the company-wide transition from the legacy e-commerce platform to Shopify, implementing backend data migration and core service integrations in preparation for the platform launch. • System Modernisation: Modernis

Worked in an agile team responsible for payment and checkout systems on a large-scale German e-commerce platform. • Developed integrations between the e-commerce platform, Microsoft Dynamics NAV, payment services and internal systems using REST APIs. • Worked across critical checkout flows including payments, shipping, order creation, security checks and ERP communication. • Contributed to moving legacy monolithic functionality toward a service-oriented architecture, including payment and ERP services

Worked on automotive marketplace and internal platforms supporting vehicle inspection, evaluation and business operations. • Developed and maintained backend functionality across several applications using PHP, Symfony, Doctrine and Elasticsearch. • Built and evolved REST APIs connecting PHP services, Java-based systems and React/Redux frontends, supporting vehicle inspection, evaluation and marketplace workflows. • Refactored legacy code and expanded automated test coverage with PHPUnit and Behat whi

Developed web applications and REST APIs for international clients across SaaS, payments, fundraising and mobile-connected platforms. • Built backend and administration systems using PHP, Zend Framework, Laravel and MySQL. • Integrated third-party services including Stripe, Foursquare and Facebook APIs. • Worked across the full web stack, including frontend development, analytics/reporting systems and REST APIs supporting iOS and Android applications.

Developed, deployed and maintained PHP/MySQL web applications, e-commerce platforms and CMS-based solutions. Worked across backend development, frontend implementation, customisation of existing modules and production deployments. Tech: PHP · MySQL · JavaScript · HTML/CSS · Magento · WordPress · Joomla · osCommerce

http://www.prime.de/ Worked on PRIME PZE, an enterprise time, attendance and access-control system. Developed application modules, database functionality and desktop UI; refactored existing code and expanded unit test coverage. Tech: C# · .NET · ASP.NET · MSSQL Server · ADO.NET · Infragistics

Maintained and troubleshot an Oracle/PL/SQL and Delphi-based warehouse, POS and business-management system, including database procedures, application issues and business reporting. Tech: Oracle · PL/SQL · Delphi · Point of Sale (POS) Systems