Bálint Décsi

balint.decsi@gmail.com balintdecsi.github.io LinkedIn GitHub Vienna, Austria / Budapest, Hungary

Bálint Décsi

Experience

CTO

Proximata · May 2026 – Present · Vienna, Austria
  • Leading technical strategy and execution at Proximata, a Vienna-based hacker lab.
  • Driving product and engineering decisions from concept to production for AI-native products.
  • Building tech solutions and spinoffs by enabling ambitious builders with infrastructure and resources.
  • Company profile: LinkedIn.
Technical Leadership AI Systems Product Engineering Venture Building

Builder

mesh. · June 2025 – Present · Budapest, Hungary
  • Member of Hungary's first hacker space.
  • Engineering an ML-driven SaaS that generates stylized comics with consistent characters from images.
  • Rapid prototyping using Supabase, Firebase, and modern full-stack tools.
  • Leveraging AI Agents (Cursor, Gemini CLI, Copilot) for accelerated, parallelized development.
AI Agents ML Prototyping SaaS Supabase Firebase LLMs

Data Engineer

Deutsche Telekom IT Solutions HU · May 2024 – Present · Budapest, Hungary
  • Engineering scalable ML solutions and pipelines for the fixed-line business segment.
  • Building a modern Data Lakehouse using Apache Iceberg on Google Cloud Platform.
  • Developing automated Apache Airflow pipelines for robust data ingestion and processing.
ML Engineering Apache Iceberg GCP Airflow Data Lakehouse

Advanced Analytics Expert

Vodafone Hungary · Oct 2023 – Apr 2024 · Budapest, Hungary
  • Optimizing network infrastructure using unsupervised machine learning techniques.
  • Implementing Explainable AI (XAI) to drive business engagement and trust in model decisions.
  • Developing interactive geospatial visualizations to support strategic network planning.
Unsupervised ML XAI Geospatial Python

Data Scientist

Vodafone Hungary · Apr 2023 – Oct 2023 · Budapest, Hungary
  • Fourth rotation in Vodafone's Discover Graduate Program (six-month rotations in different position for two years for freshly graduated employees).
  • End-to-end delivery of machine learning models for external B2B clients.
  • Engineered a custom feature store for geospatial and location-based data.
  • Developed automated web scraping tools for competitive intelligence gathering.
ML Modeling Python Feature Engineering Web Scraping Geospatial

Data Analyst

Vodafone Hungary · Oct 2022 – Apr 2023 · Budapest, Hungary
  • Third rotation in Vodafone's Discover Graduate Program (six-month rotations in different position for two years for freshly graduated employees).
  • Architected foundation data models for a major geospatial retail analytics initiative.
  • Translated complex analytical results into actionable reports for business stakeholders.
SQL Data Visualization Business Intelligence Geospatial

Data Warehouse Specialist

Vodafone Hungary · Apr 2022 – Oct 2022 · Budapest, Hungary
  • Second rotation in Vodafone's Discover Graduate Program (six-month rotations in different position for two years for freshly graduated employees).
  • Designed and implemented optimized data marts on a cloud-native lakehouse architecture.
  • Collaborated with cross-functional stakeholders to define technical data requirements.
Cloud Data Warehouse SQL Data Modeling Lakehouse

Data Engineer

Vodafone Hungary · Sep 2021 – Apr 2022 · Budapest, Hungary
  • First rotation in Vodafone's Discover Graduate Program (six-month rotations in different position for two years for freshly graduated employees).
  • Built ETL pipelines migrating critical on-premise data to cloud-based environments.
Data Pipelines Cloud Migration ETL

Undergraduate Research Fellow

Institute of Biochemistry, Biological Research Centre · Jan 2019 – Jun 2020 · Szeged, Hungary
  • Developed computer vision plugins for automated biological image analysis.
  • Applied deep learning techniques to high-throughput microscopy data.
  • Designed and implemented robust data management systems for large-scale measurements.
Computer Vision Deep Learning Biomedical Imaging

Education

MS Business Analytics

Central European University · Sep 2025 – Jun 2026

MS Data Science for Machine Learning

Pázmány Péter Catholic University · Jan 2020 – Dec 2021

BS Molecular Bionics

University of Szeged · 2016 – 2020

Exchange — Biomedical Engineering

Universidad CES, Colombia · 2019

Certifications

  • Generative AI Fundamentals
  • Launching into Machine Learning
  • Modernizing Data Lakes and Data Warehouses with Google Cloud
  • Introduction to Responsible AI
  • EUGLOH Summer School

Awards & Scholarships

  • Highlighted Study Scholarship of the Hungarian State
  • Municipal Scholarship of Szeged
  • Campus Mundi Scholarship
  • IT Star Award
  • Data Rockstar