Darian Tsintzas

Senior Technical Project Manager at crossbuilders

I make delivery predictable — so the system carries the load, not the people.

Three projects ↓

Work · 2021 – 2024

Launch. Rebuild. Own.

Three products — built, launched, and owned.

  1. 01 · Aral SuperCard · 2021

    Launching a digital gift card

    From plastic-only to a digital product — and its market debut.

    Context

    Aral’s fuel gift card existed only as physical plastic. The task: develop a digital SuperCard and change the underlying systemic infrastructure to support it.

    What I did

    Led the initiative as intermediary across every stakeholder — payment provider, POS vendor, IT security, the digital-card solution provider — and owned the market launch.

    • #1

      Best-selling product & top revenue driver in 2021

    • +132 %

      Total revenue vs. the prior year

    • 3

      Further products built on the new infrastructure

  2. 02 · MagentaZuhause App · 2023

    Rebuilding a contract booking journey

    A full platform rebuild, delivered on time in a regulated setup.

    Context

    The booking platform was embedded in the smarthome.de webshop. A strategic split forced separation — so we chose a complete new build of the platform.

    What I did

    Ran a tight planning phase, locked binding timelines across all parties, and drove the rebuild — coordinating booking service, partner portal, customer database and IT security.

    • +21 %

      Completed contract bookings

    • −59 %

      Error rate on bookings

    • On time

      Shipped to production as scheduled

  3. 03 · Wüstenrot · 2024

    A middle-office layer for loan officers

    AI-assisted gathering & editing between intake and the system of record.

    Context

    Loan officers processed fragmented application data by hand. We built one layer that gathers, edits and enriches every application type — with AI for document analysis and extraction.

    What I did

    Led and owned the build in the regulated financial domain — from MVP to a production platform now handling the full range of individual applications.

    • ~90 % faster

      Average application processing time

    • 70,000+

      Applications processed since launch (Sept 2024)

    • +6

      Verticals added since the MVP

Project showcase as PDF ↓

About

Darian Tsintzas

The through-line

Across every product the same skill: hold the whole-system map, align every stakeholder, and make delivery predictable.

At crossbuilders I led the build of an AI-assisted middle-office layer — from MVP to production platform. Across a portfolio of 12 applications in a regulated financial environment I established delivery discipline: a central single source of truth, a reproducible deployment process, company-wide meeting cadences.

Before that I was Product Owner for two e-commerce products of a world-leading telecommunications company and led a 15-person team. At antwerpes I steered all digital activities for Aral SuperCard — a 20-person project team and a budget of over €4 million.

Economics degrees from Bonn (B.Sc.) and Cologne (M.Sc.). Certified Professional Scrum Product Owner and Scrum Master (PSPO I, PSM I).

Experience

  1. since 03/2024Senior Technical Project Managercrossbuilders GmbH
  2. 12/2022 – 02/2024Product Owner E-Commercei22 Digitalagentur GmbH
  3. 11/2020 – 11/2022(Junior) Account Managerantwerpes ag
  4. 10/2017 – 10/2019Junior Project Managerninepoint consulting GmbH
  5. 08/2016 – 09/2017Esports Editor-in-Chiefesp entertainment eK

Contact

Let’s talk delivery.

Email
dariantsintzas@gmail.com
LinkedIn
linkedin.com/in/dariantsintzas ↗
CV
CV as PDF ↓