Yohan Medalsy

Available to hire

I'm Yohan Medalsy, a Senior Data Scientist and independent AI consultant with 8+ years across gaming, marketing technology, and asset management.

About

I’m Yohan Medalsy, a Senior Data Scientist and independent AI consultant with 8+ years across gaming, marketing technology, and asset management. I’ve built production ML systems and measurement frameworks that drive growth, including ~25% ROAS uplift via MMM and retention improvements through churn modeling.

I have a strong background in statistics, time-series, optimization, and reinforcement learning, delivering solutions with Spark/Databricks/Airflow/AWS and modern data stacks. I enjoy turning data into business value and collaborating across teams to ship impact at scale.

  • 8 years' experience
  • Joined January 2026

Skills· 4

Languages

  • Hebrew (modern)Advanced
  • EnglishFluent
  • FrenchFluent

Industry experience

  • Gaming
  • Media & Entertainment
  • Financial Services
  • Professional Services
  • Software & Internet

More experts in Ramat Gan, Israel

Work experience· 4 roles

Independent AI Consultant · Independent AI ConsultantMay 2025 – Present · 1 yr 7 mos

Providing end-to-end ML/AI solutions for multiple clients: developing contextual bandit system for game monetization; building LTV forecasting and ROI-driven decisions; designing agentic content workflows and an AI ghostwriter for social posts; prototyping and backtesting a quant trading algorithm.

Senior Data Scientist · Huuuge GamesMay 2021 – Mar 2025 · 3 yrs 11 mos

Led end-to-end data science initiatives for Huuuge Casino and Marketing; built production ML/AI pipelines (Python, Spark/Databricks) for marketing decisioning; owned MMM pipeline driving ~25% ROAS uplift; developed embedding-based look-alike targeting and propensity/LTV scoring; improved UA efficiency; built churn/disengagement prediction; improved D7/D30 retention; productionized pipelines with Databricks, Airflow, monitoring, and documentation.

Data Science Tech Lead · Imprint SocialFeb 2020 – Apr 2021 · 1 yr 3 mos

Led AI/Data Science across R&D and business stakeholders; built NLP classification pipeline for X (Twitter) to identify high-impact posts and micro-influencers; hired and mentored Data Scientists; established best practices for experiment design, offline metrics, and launch readiness.

Quantitative Analyst · Asset ManagementMay 2016 – Apr 2018 · 2 yrs

Education

BSc Actuarial Mathematics · Concordia University2010 – 2013
Data Science Elite Fellowship · Israel Tech Challenge (ITC)2019

Certifications and awards

BSc Actuarial Mathematics2010 – 2013
Data Science Elite Fellowship2019

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