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Johannes OstertagJO

Johannes Ostertag

Product Owner, Project Manager

€1,000/day
Ingolstadt, DE
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Johannes

I am a Product Owner with passion and love building and further developing digital platforms.
I have been doing SCRUM since 2010; my technical understanding as a computer scientist and my positive interaction with customers help me enormously to recognize the needs and interests of all stakeholders and to incorporate them into the product as added value when necessary.
  • German

    Native or bilingual

  • English

    Fluent

Can work on-site
Ingolstadt (up to 50km)

Experience

  • FourEnergy GmbH;
    IT Services and IT Consulting
    DIGITAL AND IT
    July 2025 - Today (11 months)
    Berlin, Germany
    Concept and implementation of a full-stack web application for
    automated research, analysis, and management of public
    tenders via the European TED platform (Tenders
    Electronic Daily). (https://ted.europa.eu/de/)
    The application allows relevant tenders to be specifically identified,
    categorized, and processed and answered within the system.

    Development of a system for automated pre-qualification of
    public tenders on the European TED platform. The goal was to reduce
    manual effort in the daily screening process, where around 60 notices
    per day are checked – over 90% of which are not relevant.
    Tasks & Implementation:
    • Integration of the TED API v3 for structured capture and storage of tender data in a relational database
    • Development of an AI-supported evaluation system (based on ChatGPT) for automated relevance analysis based on defined AI rules
    • Implementation of a filter system for pre-selection of potentially relevant tenders
    • Validation by comparison with manually checked results of a Tender Manager
    Goals Achieved:
    • 100% detection of all tenders marked as relevant by the Tender Manager
    • Maximum deviation between AI evaluation and manual check < 3 tenders per day
  • Bundesdruckerei GmbH;
    Interface Product Owner
    March 2025 - June 2025 (3 months)
    Berlin, Germany
    The goal of my work was to bring transparency and structure to a heterogeneous IT landscape and to reduce technical and operational complexity through targeted measures. Tasks and responsibilities:
    • Systematic analysis and technical documentation of a heterogeneous system landscape (over 40 microservices, ~30 connected systems and interfaces) to identify technical debt and promote standardization
    • Reduction of operational complexity through the introduction and implementation of uniform standards for the structured capture and tracking of JIRA issues
    • Identification of approx. 3,500 rule violations within a period of six months through systematic analysis of workflows and tickets
    • Measures to improve ticket quality:
    ◦ Development of a rule set for detecting and avoiding typical errors and for raising awareness in the team
    ◦ Adaptation of the Definition of Ready (DoR) and Definition of Done (DoD) for clearer task description and quality assurance
    ◦ Revision of the JIRA workflow to permanently avoid structural rule violations Kubernetes infrastructure, Openshift, Docker, Prometheus, Kibana, Grafana, Drupal, Apigee
  • Bundesdruckerei GmbH;
    Product Owner
    September 2024 - February 2025 (5 months)
    Berlin, Germany
    Further development of the foreign portal (https://digital.diplo.de)

    The foreign portal is the central digital platform for all online available information and administrative services of the Federal Foreign Office and German missions abroad. It is developed by the Federal Printing Office on behalf of the Federal Foreign Office and is part of the legal and consular IT system landscape (RK).

    As one of the lighthouse projects of the federal government's digital strategy, the foreign portal plays a crucial role in implementing the new Skilled Immigration Act. Furthermore, with the portal, the Federal Foreign Office (AA) is implementing the mandate from the Online Access Act (OZG) to provide administrative services online.

    The bilingual portal (German and English) serves on the one hand as an information platform for interested parties who want to inform themselves about the administrative services of the AA. On the other hand, it functions as a digital application portal for visa and passport applications. Previously, these applications had to be submitted in paper form on-site, which involved considerable effort and long waiting times. Thanks to the digital solution, the processes are significantly simplified for both applicants and German missions abroad. In addition, case workers can pre-check applications regardless of location.

    The foreign portal makes administrative processes more efficient, transparent, and user-friendly. Applicants can check the status of their application at any time. This is a significant relief, especially for skilled workers from abroad, when immigrating to Germany.

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Education

  • Diplom-Informatiker (FH)
    Regensburg University of Applied Sciences
    2011
    Vertiefungsfächer: Network Management, Wireless Communication and Networking, Management der Informationssicherheit, Grundlagen der Künstlichen Intelligenz Diplomarbeitsthema: „Defining Smart Grid security architecture and developing a HAN simulator“
  • Computer Engineering
    Regensburg University of Applied Sciences
    2007
    Technische Informatik

Certifications

  • Professional Scrum Master
    Scrum.org
    2018
    Professional Scrum Master Scrum Master Agile Method Scrum PSM
  • Professional Scrum Product Owner
    Scrum.org
    2024
    Agile Method Product Owner PSPO Scrum Professional Scrum Product Owner Product Ownership

Skill set

Categories