Machine Learning Engineer
Smadex SLU2 months ago
Barcelona, SpainSenior
Responsibilities
- Optimize ad selection and bidding to maximize advertisers’ return on ad spend across approximately 4 million ad opportunities per second.
- Develop models for user response, auction closing price, and other real-time bidding problems, including sparse positive samples and labeling delays.
- Research, design, build, deploy, and operate full-stack machine-learning solutions at web scale.
- Analyze data, evaluate model performance, and assess the statistical significance of A/B tests.
- Contribute ideas to product-roadmap and business decisions.
Requirements
- Proactive, autonomous, results-oriented problem-solving approach with strong attention to detail and ability to manage multiple priorities.
- Strong foundation in regression, distribution properties, statistical significance testing, and related statistical concepts.
- Experience with machine learning and predictive modeling, including neural networks, logistic regression, gradient-boosted trees, and time-series analysis.
- Good programming skills with Python and familiarity with PyTorch, pandas, and NumPy.
- Competence in data analysis with SQL and pandas.
- Familiarity with Git and excellent written and verbal English communication skills.
- Preferred: master’s degree in Machine Learning, AI, Statistics, Mathematics, or Computer Science; production experience with high-performance algorithms; Apache Spark; Java or Scala; transformer architectures and LLMs; digital marketing platforms and user acquisition; and AWS services including SageMaker, EMR, EC2, Athena, and S3.
Benefits
- Highly motivated and international team.
- Work from home two days per week.
- Private health insurance.
- LinkedIn Learning access.
- Monthly meal vouchers or restaurant allowance.
- Monthly gym allowance through DiR Gym or Wellhub.
- Monthly TGIF events and regular team-building events.
- Office in central Barcelona with a rooftop terrace, barbecue, and stocked fridge.
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