Mercado Libre is hiring a Senior Senior ML Engineer — marketplace & fintech on the Melidata & fraud team (Hybrid · Buenos Aires, Argentina). This is a hands-on role in NLP & language AI—not a generic “AI enthusiast” post.
You will own language understanding, generation, and quality metrics end to end: problem framing, offline evaluation, safe rollout, and iteration from production signals. Success is measured with clear metrics (quality, latency, cost, or business KPIs)—not slide decks alone.
**Mercado Libre** is Latin America's largest **e-commerce and fintech** ecosystem — marketplace, **Mercado Pago**, and logistics — HQ in **Buenos Aires**.
Senior ML Engineer (hybrid Buenos Aires): **search ranking**, **fraud**, and **credit** models across MELI's regional footprint.
About Mercado Libre
- NASDAQ-listed (MELI); engineering center in Puerto Madero, Buenos Aires.
- Petabyte-scale data; experimentation is daily practice.
- Spanish/Portuguese product markets across LATAM.
What you will do
- Own ML features from offline training to production monitoring.
- Improve fraud and trust models for payments and listings.
- Collaborate on Spanish-language NLP for search queries.
Stack & environment
- Python, PyTorch, Spark, AWS.
- Hybrid Buenos Aires.
What we look for
- Marketplace or fintech ML; Spanish required.
- Eligible to work in Argentina.