Data Scientist – Cloud Data Technologies

eBay; Dublin; On-site; EUR 90,000 - 120,000; Full time

Job summary

eBay is seeking a Data Scientist in Dublin to improve decision-making through advanced analytics. You will build and evaluate models, apply ML techniques, and contribute to bot detection and customer profiling initiatives. Strong Python or R skills and SQL proficiency are essential, with experience in Hadoop/Spark in cloud environments.

The role focuses on experimentation, causal inference, and collaboration with cross-functional teams to deliver scalable data solutions.

Qualifications

• 5+ years of relevant experience with a master’s degree or Ph.D. in Computer Science or another quantitative field.
• Experience building statistical or ML models and evaluating model performance.
• Proficiency in Python or R and ML libraries such as scikit-learn or GBM.
• Advanced SQL skills and experience optimizing large-scale queries.
• Experience with Hadoop and Spark in cloud environments.

Responsibilities

• Contribute to complex data science projects from analysis through model development and evaluation.
• Develop and implement advanced statistical models and ML algorithms to address business challenges.
• Support experimentation and causal inference initiatives including A/B and multivariate testing.
• Use advanced SQL to work with large-scale datasets and optimize big data queries.
• Collaborate with cross-functional teams to define requirements and develop data solutions.

Education

Master's degree or PhD in Computer Science or related quantitative field

Tools

Hadoop

Spark

scikit-learn

GBM

Python

R

SQL

Job description

At eBay, we're more than a global ecommerce leader — we’re changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. We’re committed to pushing boundaries and leaving our mark as we reinvent the future of ecommerce for enthusiasts.

Our customers are our compass, authenticity thrives, bold ideas are welcome, and everyone can bring their unique selves to work — every day. We're in this together, sustaining the future of our customers, our company, and our planet.

Join a team of passionate thinkers, innovators, and dreamers — and help us connect people and build communities to create economic opportunity for all.

About The Team And The Role

The Cloud Data Technologies (CDT) team at eBay is responsible for eBay’s data infrastructure, including the experimentation platform and the end-to-end data lifecycle, from onsite data through to analytics use cases.

We are seeking a Data Scientist to help improve the speed and quality of decision‑making by applying advanced data science methods and turning complex data into actionable insights. You will have the chance to work on projects involving machine learning‑based bot traffic detection and customer profile development. This includes improving A/B testing methods such as interleaving tests, sequential testing, and Bayesian methods.

What you will accomplish

• Contribute to complex data science projects, from analysis through model development and performance evaluation.
• Develop and implement advanced statistical models and machine learning algorithms to address business and data challenges.
• Support experimentation and causal inference initiatives, including A/B and multivariate testing and improvements to testing methodologies.
• Use advanced SQL to work with large‑scale datasets and optimize big data queries.
• Collaborate with multi‑functional teams to define requirements and develop data solutions that support effective decision‑making.
• Contribute to machine learning use cases such as bot traffic detection and customer profile development.
• Evaluate relevant developments in data science and identify new technologies or methodologies that could improve existing approaches.

What you will bring

• 5+ years of relevant experience with a master’s degree or Ph.D. in Computer Science or another quantitative field.
• Experience building statistical or machine learning models and evaluating model performance.
• Proficiency in Python or R and relevant machine learning libraries, such as scikit‑learn or GBM.
• Advanced SQL skills, including experience optimizing queries for large‑scale data.
• Experience working with Hadoop and Spark in cloud environments.
• Strong problem‑solving skills and experience deploying machine learning models in production environments.
• Clear communication skills, with the ability to explain complex findings to non‑technical audiences.

Additional Details

eBay is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, sex, sexual orientation, gender identity, veteran status, and disability, or other legally protected status. If you have a need that requires accommodation, please contact us at [e-mail]. We will make every effort to respond to your request for accommodation as soon as possible. View our accessibility statement to learn more about eBay's commitment to ensuring digital accessibility for people with disabilities.

We use cookies to enhance your experience and may use AI tools for administrative tasks in the hiring process. To learn how we handle your personal data and use AI responsibly, please visit our Talent Privacy Notice, Privacy Center, and AI Hiring Guidelines.