Data Scientist - Ad-Tech (Remote, Global Impact)

Lever, Inc.; Ireland; On-site; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Direct exposure to founders

Learning and growth opportunities

Remote work with flexible hours

Relocation option to Berlin

Home-office setup budget

Learning & development budget

Job summary

Lever, Inc. is seeking a Data Scientist based in Ireland to work on ML models that process terabytes of data and support billions of real-time advertising requests worldwide.

You will own the full data science lifecycle from research and exploration through experimentation, development, and production deployment, collaborating with ML engineers and analysts to deliver scalable solutions. The role emphasizes experimentation, A/B testing, and measurable business impact within a diverse,

Qualifications

• At least 3 years of experience building data science products from research to production.
• Strong programming skills focused on clean, maintainable, well-tested code.
• Experience with Python, Spark, Hadoop, Airflow, Docker and SQL in production environments.

Responsibilities

• Develop, improve, and maintain data science products end-to-end.
• Enhance models by adding features and tuning parameters.
• Collaborate with ML engineers to deploy scalable algorithms.
• Explore data sources to improve model performance and insights.
• Design and evaluate A/B tests to guide decisions.
• Apply algorithms to large-scale datasets for prediction and clustering.
• Build monitoring dashboards and SQL-based tools for performance tracking.
• Write reproducible code and maintain DS workflows.
• Collaborate with stakeholders to deliver measurable business value.

Skills

Python

Spark

Hadoop

Airflow

SQL

Statistical evaluation

A/B testing

Ad-Tech experience

Neural networks

Reinforcement learning

Tools

CatBoost

LightGBM

Docker

SQL-based dashboards

Job description

Lever, Inc. is seeking a Data Scientist based in Ireland to work on ML models that process terabytes of data and support billions of real-time advertising requests worldwide.

You will own the full data science lifecycle from research and exploration through experimentation, development, and production deployment, collaborating with ML engineers and analysts to deliver scalable solutions. The role emphasizes experimentation, A/B testing, and measurable business impact within a diverse,