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Ghislain Tchangang DjionangGT

Ghislain Tchangang Djionang

Senior Product Owner (MBA), Independent Consultant

1.000 €/Tag
Mannheim, DE
15+ Jahre

Durchschnittliche Reaktionszeit: 1h

Über Ghislain

Senior Product Owner and Manager (MBA) with 15 years delivering complex, regulated platforms end to end in major German enterprises (Porsche, Mercedes-Benz Bank, Daimler Mobility, Unzer, Fiducia & GADIT). I own the arc from business case and technology assessment through architecture, SDLC, and vendor steering toaudit-grade production rollout at scale. I combine hands-on engineering depth (Java, Spring Boot, microservices, cloud)with program-level governance (BaFin, BAIT, MaRisk, ISO 27001, GDPR, IKS), multi-million-euro budget ownership, andexecutive-level stakeholder management. Trilingual at C2 (French native, German, English).
  • Englisch

    Verhandlungssicher

  • Französisch

    Muttersprachlich oder zweisprachig

  • Deutsch

    Verhandlungssicher

Vor Ort möglich
Mannheim (bis zu 50 km), Frankfurt am Main (bis zu 50 km), München (bis zu 50 km), Berlin (bis zu 50 km), Düsseldorf (bis zu 50 km)

Projekt- und Berufserfahrung

  • Porsche AG
    Senior Product Owner
    November 2023 - Heute (2 Jahre und 9 Monate)
    Stuttgart, Deutschland
    Own Porsche's enterprise Atlassian collaboration and CI/CD toolchain for 20,000 internal and external users across 4 on prem instances. Mandate: hold platform stability and security while preparing migration to Atlassian Cloud SaaS. Budget steered: €2–3M per year. Vendor portfolio: 2 to 10 providers. Indirect PO leadership of a 7 to 10 person service-provider team (matrix model). Rationalized the plugin footprint from 55 to 30 across 4 on-prem instances, delivering ~€120k annualized cost
    • •
    Governance, Risk and Compliance Product management Stakeholdermanagement Agile Softwareentwicklung Artificial Intelligence (AI)
  • Daimler Mobility AG
    Tech Lead → Lead Software Developer
    März 2019 - Oktober 2020 (1 Jahr und 7 Monate)
    Stuttgart, Deutschland
    Technical leadership of a pay-how-you-drive telematics insurance product for Mercedes-Benz vehicles, owned by DaimlerMobility, covering 10,000+ connected vehicles across 12 European markets. Team: 3 internal Stuttgart-baseddevelopers.Architected and led the monolith → microservices migration (Java Spring Boot and Micronaut, Kubernetes on hybridcloudOpenShift), including API ecosystem design.Introduced TDD with 90% SonarQube coverage quality gate as a required merge criterion. Cut API response time by ~40% (internal benchmark) via systematic refactor of legacy endpoints.Shifted delivery cadence from a fixed release train to on-demand deployment, raising production deployment frequency. Removed material tech debt via structured codebase audits and team-wide refactor sprints. Mentored 3 junior developers through code review and pair programming; 2 advanced to senior level during my tenure.
    Digital Transformation Leadership Stakeholdermanagement CI/CD Change Management & Transformation Governance, Risk and Compliance
  • Mercedes-Benz Bank AG
    Senior Technical Program Manager (promoted from Product Owner)
    Oktober 2020 - Oktober 2023 (3 Jahre)
    70 Stuttgart, Germany
    Mandate: close a BaFin 2019 F1 audit finding on the lack of a unified, auditable software development toolchain at MBB. Built the regulatory-compliant BizDevSecOps platform covering the full SDLC under BAIT 7. Budget: €5M over 3 years. Team: 2 internal + 7 external engineers. Internal customer base: ~50 developers. Started as Product Owner (6 months). Promoted to Senior Technical Program Manager after supervisor unavailability; took over stakeholder management, procurement, vendor contracts, steering committee representation, and program budget. Delivered a unified, auditable BizDevSecOps toolchain (GitHub, GitHub Actions, Artifactory, Teamscale, Jira,
    • • Confluence) inside the BaFin buffer window, closing the F1 finding and passing BaFin review. Covered the full BAIT 7 scope end to end: SCM, CI/CD, artifact management, test automation, release management, ticket management, documentation, business-requirements management, and IKS controls. Handed over rollout of 100 software projects to a successor Program Manager; rollout completed post-handover. Steered procurement and contract management for 7 external vendors on a €5M / 3-year envelope. Represented the program in steering committee and QA gates; authored decision papers for BaFin-relevant investment decisions.
    • •
    • •
    • •
    • •
    • • cloud OpenShift), including API ecosystem design. Introduced TDD with 90% SonarQube coverage quality gate as a required merge criterion. Cut API response time by ~40% (internal benchmark) via systematic refactor of legacy endpoints. Shifted delivery cadence from a fixed release train to on-demand deployment, raising production deployment frequency. Removed material tech debt via structured codebase audits and team-wide refactor sprints. Mentored 3 junior developers through code review and pair programming; 2 advanced to senior level during my tenure.

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Ausbildung und Abschlüsse

  • MBA
    Business and Society
    2023
    MBA
  • B.A.Sc.
    Hochschule Worms
    2012
    B.A.Sc.

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