Data Scientist (m/f/d)

๐Ÿข Kayzen ยท all Kayzen jobs
๐Ÿ“ Austria,Germany,Switzerland
๐Ÿ“… Posted 2026-07-19 ยท via Himalayas
๐Ÿท Data-Scientist,Machine-Learning,Data-Science,AdTech,Data-and-Product,Data-Scientist-II
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Data Scientist (m/f/d) Europe, Remote

Hello๐Ÿ‘‹I am Puneet , Co-founder and CPO at Kayzen , and I am now looking for a Data Scientist to join our team ๐Ÿ™Œ
But wait, you have not heard of Kayzen before?๐Ÿ˜ƒ

Kayzen is a mobile demand-side platform (DSP) dedicated to democratizing programmatic advertising. We enable leading apps, agencies, media buyers, and brands to run programmatic customer acquisition, retargeting, and brand performance campaigns through its self-serve and managed service options. Built on the three core pillars of performance, transparency, and control, Kayzen powers the worldโ€™s best mobile marketing teams with bespoke solutions that fuel business growth and deliver a competitive advantage. With an unprecedented scale of 160B+ daily ad requests from 1.6B+ unique users worldwide, we serve up to 1B+ ads per day in 180 countries. Kayzen is accessible through our APIs and user interface.
The Team

You will work with a carefully selected, diverse and globally distributed Data Science team (like Heiko, Chen) on various machine-learning models that process terabytes of data, serving billions of ad requests and users around the globe in real-time. We are highly motivated and aligned in our quest to disrupt the multi-billion dollar ad-tech industry. We would like you to be part of our journey, as our Data Scientist (m/f/d) .
Responsibilities

Our day-to-day work in Data Science and Machine Learning encompasses a wide range of activities, including:

- Enhancing Models: Continuously improving existing models by incorporating new features, fine-tuning parameters, and utilizing additional data.

- Algorithm Development: Collaborating with our Machine Learning Engineering team to develop and deploy scalable supervised and unsupervised learning algorithms.

- Data Exploration: Identifying and exploring new data sources while researching innovative ways to leverage both new and existing data effectively.

- Solution Research: Investigating new Machine Learning solutions to optimize every step of our value chain.

- A/B Testing: Regularly conducting and evaluating A/B tests to drive insights and refine our strategies.

Youโ€™ll be a great fit if you resonate with the following principles of Data Science and Machine Learning:

- Simplicity First: We prioritize finding the best solutions to challenges rather than forcing problems to fit predetermined solutions.

- Impact-Driven: We leverage Machine Learning to enhance our product and drive performance for our clients, always focusing on tangible business outcomes.

- Collaborative Spirit: Our teams consist of analysts, engineers, and data scientists, making strong communication skills essential for success.

- Embrace Experimentation: We believe in the power of experimentation to innovate and refine our approach continually.

Requirements

- At least 3 years of relevant experience in developing data science products , from initial research through to production deployment.

- Strong coding skills with a focus on clean, reproducible, and well-tested code.

- Proficient in key tools and technologies including Python, Spark, Hadoop, Airflow, Docker, and SQL.

- Hands-on experience with algorithms for handling sparse and large datasets, including applications in prediction, clustering, and outlier detection.

- Familiarity with Gradient Boosting Trees (CatBoost, LightGBM) in production environments is a plus.

- Experience in building neural network-based products for tasks such as classification, regression, and multi-task learning is highly valuable.

- Bonus skills: Knowledge of reinforcement learning and large-scale optimization problems is a significant asset.

- Good understanding of dashboards and SQL for developing and enhancing monitoring tools.

- Previous experience in Ad-Tech is a must.

What do we offer?

- Directly working with Founders and an opportunity to drive direct impact

- Exceptional career growth and learning opportunity

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