Senior Data Scientist

1 week ago

Athens, Attica, Greece Signify Technology Full time €50,000 - €70,000 per year

Senior Data Scientist | Revenue Management Platform | Processing 24M+ Tickets Annually

Athens, Greece - Hybrid

Up to €65,000

We're looking for a
Senior Data Scientist
to help shape the future of our
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

  • 6+ years of experience in
    Data Science or Applied ML
    , with a proven record of delivering production models.
  • Strong foundations in
    statistics, inference, experimentation
    , and
    optimization
    .
  • Expert-level
    Python
    (NumPy, Pandas, PyTorch or TensorFlow).
  • Experience running and analyzing
    large-scale online experiments
    .
  • Familiarity with
    data platforms, Git, testing
    , and collaborative software practices.
  • Excellent
    product intuition
    — you turn business challenges into measurable ML solutions.

Interested? Apply to be considered with interviews commencing from the 3rd November.

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