Portrait of Stefanos Tzortzoglou

Hey👋, I'm Stefanos Tzortzoglou

Στέφανος Τζώρτζογλου

I build the enterprise integrations most CSMs escalate

Technical Customer Success Manager | SQL, REST APIs, CDP & CRM/ERP integrations | Stockholm

Enterprise onboarding stalls on the same three things: an API nobody documented, a schema that does not match the one it has to feed, and a field nobody can define. I write the SQL, configure the API integrations, map the CRM/ERP data, and get the customer live, bringing developers in only when something new has to be built.

View the case studies

Currently a Technical Customer Success Manager at Data Talks. Get in touch.

What I do

I run enterprise onboarding and implementation delivery, kickoff to go-live, for 40+ sports clubs, leagues and federations so far. The integrations that decide whether a customer renews are the ones I work out myself. I start from the customer's commercial goals and work inside their own data until the integrations meet them.

Read the full profile How I run an onboarding

  • Technical Execution

    SQL, REST APIs, and CRM/ERP data mapping.

  • Renewals

    Integrations that keep working, so the renewal conversation starts from results.

  • Delivery

    Scope, milestones and dependencies, with the provider meetings run myself.

  • Analytics & Segments

    Identity resolution, dashboards, and teams that build their own segments.

Selected Case Studies

  1. 01

    API Architecture

    Global Ticketing API Mapping

    Reverse-engineered undocumented API logic for a global ticketing platform, so its event data could be standardised without breaking the systems already reading it.

    • JSON
    • Data Mapping
    Read the case study

  2. 02

    Data Privacy

    US Sports League: Protecting Minors' Data

    Designed the identity resolution and a "Parent/Guardian" entity model for a US league's youth network, so marketing reached authorised adults while minors' data stayed siloed.

    • Privacy
    • Identity Resolution
    Read the case study

  3. 03

    AI Automation

    Segmentation Engine Migration

    Built an AI toolkit that rebuilds each customer's segments on a new engine through the platform's API, so a migration now needs only a planning phase.

    • Generative AI
    • REST APIs
    Read the case study
View all case studies

Talk to me about an integration

I do this work at Data Talks, across enterprise accounts. Write to me about an integration, or about anything else.

Get in touch