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Machine Learning Senior Engineer (Recommendations)

Smadex SLU
Barcelona, NJ Full Time
POSTED ON 3/28/2026
AVAILABLE BEFORE 6/22/2026

Smadex is a leading advertising technology company founded in Barcelona in 2011 and sold to American-based and stock-listed Entravision in 2018 (NYSE::EVC). We are one of the top mobile ad-tech companies in the world and the largest Demand Side Platform (DSP) based in Europe, with our revenues over $100M and consistently growing 40% YoY over the past years.

Our mission is to continue to improve our ad-tech platform to help our clients achieve their programmatic advertising campaign goals, and we want to give our employees a job they’ll love, where they will be challenged to improve results through real-life engineering and data analysis and where everyone’s implication has an impact.

Are you ready to be part of the new unicorn? Keep reading!

Role overview

You will be a Senior Machine Learning Engineer dedicated to the hands-on development and optimization of our creative selection recommendation engine. This is a critical role that operates within our high-frequency, complex auction ecosystem and requires a strong blend of engineering, analytical, and cross-functional communication skills

Responsibilities

  • Development, maintenance, and optimization of the core creative selection recommendation engine
  • Coordination with creative team to define their needs and translate them into robust technical solutions

What you need to have:

  • 5 years of relevant experience in Data science / Machine Learning positions
  • Background in Mathematics, Physics, Computer Science or Data Science.
  • Proficiency in Python, SQL, Statistics
  • Hands-on experience developing solutions in related fields such as Adtech, Recommender Systems, or Marketplaces
  • Knowledge of recent advances in recommendation systems
  • Possesses excellent communication skills both verbal and written
  • Fluency in English

Reward package:

  • Integrate a highly motivated and young team.
  • Great compensation package.
  • Top location at the heart of Barcelona in a penthouse office with a rooftop terrace, barbeque, and a fully stocked fridge.
  • Work from home: 2 days/week
  • Private Health Insurance
  • Access to LinkedIn Learning
  • Meal vouchers - Tickets Restaurant monthly allowance.
  • Monthly gym allowance: Choose between DiR Gym and Wellhub
  • Monthly TGIF events.
  • Regular team-building events.
  • Fun and friendly work environment with talented marketers and engineers from over 40 countries
  • And more!

Salary.com Estimation for Machine Learning Senior Engineer (Recommendations) in Barcelona, NJ
$137,044 to $175,965
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