Data Scientist

#vacancy #job #Limassol #Cyprus #DS

Data Scientist

📍Location: Limassol, Cyprus, relocation

Our advertising network handles 10+ billion events daily across 300 servers in 5 data centers (Europe & the US). We process over 700,000 requests per second at peak load, and our ClickHouse cluster stores more than 1.8 petabytes of data. And yet, everything works like Swiss clockwork — thanks to our team of smart, talented, and proactive individuals. We’re now looking for a Data Scientist who can uncover insights from massive datasets and help scale our advertising network even further.

Responsibilities:

* Develop and evaluate machine learning models to improve product performance and business outcomes
* Collaborate cross-functionally with analysts, developers, and product managers
* Conduct deep exploratory analysis of product and user data (hundreds of billions of events per month)
* Build predictive and prescriptive models to support decision-making
* Participate in feature selection, A/B test design, and model validation
* Identify growth opportunities and optimization areas in traffic and user behavior
* Develop custom tools and dashboards to monitor key product and model metrics
* Ensure data quality, build pipelines for monitoring and anomaly detection
* Clearly present hypotheses, findings, and insights to both technical and non-technical audiences
* Drive continuous improvement of analytical tools and processes within the team

Requirements:

* Have 3+ years of experience in data science or applied machine learning
* Are confident in statistical analysis, hypothesis testing, and experimental design
* Understand the fundamentals of ad tech and media buying (or have a strong willingness to learn)
* Are fluent in SQL (especially ClickHouse – a major plus)
* Know how to work with large-scale datasets (terabytes to petabytes of data)
* Are proficient in Python or R for data analysis and ML (e.g., pandas, scikit-learn, XGBoost, LightGBM, etc.)
* Can build and interpret regression, classification, and clustering models
* Have experience with BI tools (Grafana, Tableau, Power BI, etc.)
* Are proactive, curious, and results-driven
* Can explain technical concepts clearly to non-technical stakeholders
* Know how to break down complex problems into manageable components

We Offer:

* No dress code, no bureaucracy.
* Fully official employment with a competitive salary above market level
* Laptop of your choice: Mac or PC.
* Medical insurance and mobile communication.
* Free lunches and beverages.
* Fresh fruit baskets and snacks in the office.
* Free English сourse.
* Gym membership coverage.
* Partial payment for schools and childcare (35%).
* Fitness reimbursement;Assistance with school and kindergarten payments.

Ready to take on the challenge? Join us at TrafficStars and work on an exciting, large-scale AdTech project!
Feel free to contact me:
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