Data Scientist

OLX; A distancia; EUR 45.000 - 65.000; Jornada completa

Descripción de la vacante

A leading online marketplace is hiring a mid-level Data Scientist for their Trust and Safety team. Located in Madrid, this role involves building and deploying models, working with diverse multi-functional teams across the EU. Candidates should have a strong background in data science, particularly in Python, NLP, and deep learning. The position offers a permanent contract, competitive salary with bonus, and the option for 100% remote work.

Servicios

Permanent contract

Salary + annual bonus

Training budget

MacBook Pro or Windows Dell

100% remote work

Formación

• At least 3 years of professional experience as a Data Scientist.
• Solid background in statistics and modeling.
• Proficient in English with excellent communication skills.

Responsabilidades

• Work in the Data Science team from a platform and marketplace perspective.
• Build, test, and deploy models to production.
• Maintain relationships with stakeholders and translate requirements.

Conocimientos

Analytical skills

Python

NLP knowledge

Deep Learning

SQL

Herramientas

Scikit-Learn

TensorFlow

PyTorch

Pandas

Descripción del empleo

Overview

WELCOME TO OLX

At OLX, we work together to build a more sustainable world through trade .

We make it safe, smart, and convenient to buy and sell cars, find housing, get jobs, buy and sell household goods, and more. Our colleagues around the world help to serve millions of people around the world every month, through its well-loved consumer brands including OLX, Otodom, AutoTrader, Property24.

Join OLX and see how far you can go .

JOIN OLX DATA SCIENCE TEAM

We are hiring a mid-level Data Scientist for our Trust and Safety team. In Trust and Safety, our mission is to protect the OLX community from harmful or inappropriate experiences, ensuring that our users can buy, sell and connect with confidence, whether they are searching for their next item or their next job on our platforms.

We invite you to join a team that works with our consumer platforms across the entire EU region. A team that breaks through walls and builds cross-functional connections with everyone around. A team where a common mission and goals matter more than reporting lines. We build on each other, asking for help and support when needed, and we proactively support others.

In your day-to-day routine, you will have the opportunity to work on supervised models for behavioral classification, deep learning models for image classification, regression models for value estimation, as well as NLP and LMM-based models for various applications. All using Python and the AWS cloud. You will be exposed to key stakeholders, have direct contact with internal customers. You will have carte blanche to experiment and test things. And most importantly, you will also witness how your work impacts the day-to-day business of our customers.

Responsibilities

• Work in the Data Science team from a platform and marketplace perspective.
• Build models, tinker around them to make them work, test them, and eventually deploy them to production.
• Maintain strong relationships with stakeholders. Ask many questions to business people and translate their requirements into achievable projects.
• Collaborate with other teams, like infrastructure and data engineering, to get things done efficiently.
• Partner with Engineering and Product to deliver solutions (customer-facing and platforms) to our customers (internal and end customers).
• Work with Product Analytics to track the KPIs of different ML use cases and measure the impact on our customers.
• Partner with the Experimentation team to integrate the KPIs and their proxies into the Experimentation (A/B testing) platform.
• Work in multi-functional teams in a diverse, multinational environment with people from Portugal, Bulgaria, Romania, Poland, Ukraine, Kazakhstan, and Uzbekistan.
• Have fun working with us.

Qualifications

• Located in Barcelona.
• At least 3 years of professional experience as a Data Scientist.
• Very strong analytical skills.
• Solid background in statistics and modeling.
• Good knowledge of Python and experience with Scikit-Learn, TensorFlow, PyTorch, or Pandas.
• Very good knowledge of NLP and Deep Learning (Embeddings, Language Models, Transformers, etc.).
• Good knowledge of Generative AI and Large Language Models (LLMs).
• Good understanding of engineering best practices: testing, CI/CD, monitoring, alerting, and containers.
• Hands‑on experience with SQL.
• Experience with MLOps.
• Proficient in English with excellent written and oral communication skills.
• Strong presentation skills.
• Able to work in diverse, multi-functional teams with people from different backgrounds.

Nice to have

• Exposure to other programming languages such as Kotlin, Java, Scala, etc.
• Experience bringing models into production and serving models at scale.
• Experience using AWS for deploying machine learning solutions.
• Experience with building data pipelines using tools like Spark and Airflow.
• Understanding of A/B testing and experimentation.
• Exposure to MLOps tools.

Benefits

• Permanent contract.
• Salary + annual bonus up to 15% of your annual gross salary.
• Work with and impact all OLX websites around the world.
• Train and conference budget and free access to Udemy courses.
• MacBook Pro or Windows Dell along with necessary accessories to make your work comfortable.
• 100% remote work (and the possibility to work from our offices in Barcelona).

Our hiring process

• Recruiter Interview
• Hiring Manager Interview
• Technical Interview
• Take-home Exercise
• Panel Interview

Diversity, Equity and Inclusion at OLX

OLX values diversity and welcomes applicants of all races, ethnicities, disabilities, ages, genders, sexual orientations, religions, backgrounds, and experiences to apply. If this role excites you, we encourage you to apply, even if you don’t meet all the requirements - you may be just the right fit for this or other opportunities with us!

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