Junior Data Scientist

Appodeal is a dynamic US-based product company with a truly global presence.

We have offices in Warsaw, Barcelona and Virginia along with remote team members located around the world.

Our company thrives on diversity, collaboration, and innovation, making us a leader in the mobile app monetization space.

Why Appodeal? At Appodeal, we're more than just a company—we're a team united by a common mission: to help every person discover and grow their talents We take pride in our cutting-edge product and our internationally dispersed team of talented professionals.

Here's what we value, and what we hope you do too:

Continuous Learning and Growth: We are passionate about learning, growing personally, and building rewarding careers. Making an Impact: We are committed to building a history-defining company that leaves a lasting impact on the mobile app industry. Solving Exciting Challenges: We tackle complex problems every day, supported by a team of world-class professionals and mentors. Enjoying the Journey: We believe in having fun while working toward our goals. Appodeal's Vector team is at the forefront of innovation, driving cutting-edge data science and machine learning initiatives across the AdTech ecosystem. We focus on building intelligent, scalable systems that empower our products and business units with actionable insights, predictive analytics, and AI-driven optimizations.

Joining us means being part of a dynamic, high-performing team that values ownership, excellence, and curiosity. At Vector, we tackle exciting, challenging projects that shape the future of advertising technologies.

About the Role We are looking for a motivated and passionate Data Scientist at Just Graduate level to join our Barcelona office. You will have the opportunity to apply your academic knowledge to real-world problems, collaborate with experienced professionals, and grow your skills rapidly in a supportive environment.

This role is perfect for individuals who have recently completed their degrees (Bachelor's, Master's, or equivalent) in fields such as Computer Science, Mathematics, Statistics, Physics, Engineering, or similar, and are eager to start their career in Data Science.

Key Responsibilities Assist in developing, testing, and deploying machine learning models for various business use cases (e.g., user behavior prediction, recommendation systems, fraud detection).

Clean, process, and analyze large datasets to extract valuable insights.

Conduct exploratory data analysis to discover patterns, trends, and opportunities for optimization.

Collaborate closely with senior Data Scientists, Engineers, and Product Managers on projects with real business impact.

Participate in the development of internal tools and data pipelines.

Create clear, interpretable visualizations and reports to communicate findings to technical and non-technical stakeholders.

Stay up-to-date with the latest developments in data science, machine learning, and artificial intelligence.

What We're Looking For Recent graduate in Computer Science, Data Science, Applied Mathematics, Statistics, Physics, or a related field.

Strong understanding of statistical concepts, data analysis, and machine learning fundamentals.

Proficiency in Python (preferred) or another programming language used in data analysis.

Familiarity with data science libraries such as NumPy, pandas, scikit-learn, TensorFlow, or PyTorch is a plus.

Basic understanding of SQL and working with relational databases.

Analytical mindset with a strong attention to detail.

Ability to work collaboratively in a fast-paced, international environment.

Proficiency in English (working language at Appodeal).

Nice to Have Internship or academic project experience in data science or machine learning.

Knowledge of cloud platforms (AWS, GCP, Azure) and big data tools (Spark, Hadoop).

Experience with data visualization tools (Tableau, Power BI, or similar).

Interest or background in AdTech, gaming, or mobile technologies.

What We Offer A structured onboarding program and mentorship from experienced Data Scientists.

The opportunity to work on impactful projects from Day 1.

Access to cutting-edge technologies and tools.

Career development opportunities within the Appodeal Group.

Competitive salary and benefits package.

Flexible working hours and a hybrid work environment.

Modern office located in Barcelona, a vibrant international tech hub. With an outstanding product and a mission that excites and inspires, Appodeal offers a unique opportunity to make an impact while being part of an amazing team.

Join us and help shape the future of mobile app success