Senior data scientist

Role - Senior Data Scientist
Experience: 3 to 5 years.

About the role: You'll design and own large-scale personalization systems that decide which products to show, to whom, and when, under multiple business constraints.

What you'll do:

• Build end-to-end recommender systems:
- Candidate generation (retrieval models, embeddings, ANN search)
- Ranking / re-ranking (GBDT, deep learning, hybrid approaches)
• Design objective functions aligned with business goals (CVR, revenue, margin).

Develop decision systems (multi-objective optimization, constraints). Implement and analyze online experiments (A/B, multi-armed bandits). Define feature pipelines (user embeddings, sequence features, context signals)

Current challenges:

Transition from batch recommendations → near real-time personalization. Multi-objective optimization (e.g., relevance vs margin vs inventory). Cold start and sparse user behavior

Tech stack (indicative):

Pyth...