Data Scientist

🚀 Data Scientist | Processing 24M+ Tickets Annually

🌍Athens, Greece - Hybrid

💸€55,00-€60,000

We’re looking for a Data Scientist with expertise in Reinforcement Learning to help shape the future of a revenue management platform, which processes over 24 million tickets per year. You’ll work at the intersection of machine learning, experimentation, and product, building models that directly impact business outcomes on a massive scale.

What You’ll Do

• Tackle high-impact, ambiguous problems: Collaborate with Product, Engineering, and Design to define metrics, success criteria, and roadmaps.
• Build and ship advanced models: From forecasting and ranking to optimization, clustering, causal inference, and reinforcement learning (RL).
• Work on RL challenges: Formulate MDPs/bandits, design reward functions, implement policies (e.g., DQN, PPO, actor-critic), and run offline evaluations.
• Design rigorous experiments: A/B tests, CUPED, and sequential testing — then translate results into clear business insights.
• Productionize your work: Partner with ML Engineers to deploy services, monitor performance, and manage model retraining cycles.

What We’re Looking For

• 4+ years of experience in Data Science or Applied ML, with a proven record of delivering production models.
• Previous experience working with Reinforcement Learning
• Strong foundations in statistics, inference, experimentation, and optimization.
• Expert-level Python (NumPy, Pandas, PyTorch or TensorFlow).
• Experience running and analyzing large-scale online experiments.

Interested? Apply to be considered!