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RTB House

Senior Machine Learning Researcher

Warsaw, Masovian Voivodeship, Poland

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hirly's read of this role

Seniority
Senior
Country
PL
Work mode
Remote-friendly
First seen by hirly
2 Sept 2026

Derived automatically from the posting. Upload your resume above to see how the role scores against it.

the posting

Location : Poland

We Are:

RTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Its proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to generate outstanding results and reach their goals at every stage of the funnel. As an ML Researcher , you will be responsible for its development.

Founded in 2012, and now operating in 90+ markets, RTB House has always been private-by-design. It embraces first-party advertising and a relentless approach to innovation. RTB House offers end-to-end Deep Learning-powered AdTech products and solutions to maximize conversion, drive new customer acquisition, create engagement, and fuel long-term demand for a global base of clients.

You Will:

Designing and implementing models, most often of deep neural networks, used to predict the behavior and preferences of Internet users

Analysis of the latest works in the field of Machine Learning

Conducting and analyzing A/B tests of new solutions

Developing and testing new approaches to modeling key issues, such as bidding in first-price auctions

Desired Experience:

4+ years of hands-on experience with Machine Learning / Data Science

Interest and willingness to constantly develop in the area of ​​Machine Learning

Knowledge of statistics and probability

Proficiency in programming

C1 level in Polish

Selected technologies used:

Python, Java, Scala

PyTorch, NumPy, Pandas

Jupyter Notebooks

Additional advantages will be:

Experience in the ML industry

Experience in designing recommendation systems

Practical knowledge of the tools we use

Sample topics:

Implementation and analysis of new model architectures, such as convolutional networks, transformer

Analyze the difference in the distribution of training and production data. Estimating the scale of the problem, identifying the best solution, analysis, implementation, deployment

Experiments with the use of transfer learning

A completely new approach to generating product recommendations that is free from proxy targets and uses contrastive loss function

We Offer:

Cooperate in a team of enthusiasts with experience in machine learning who willingly share their knowledge and skills

Extremely flexible cooperation conditions - you cooperate when it is convenient for you and devote as much time as you can; you can cooperate fully remotely

Access to the latest technologies and the possibility of real use of them in a large-scale and highly dynamic project;

Possibility of using the possessed knowledge and competences in practical applications - while optimizing algorithms supporting hundreds of millions of Internet users and monthly buyers of billions of advertising views in the RTB model, based on extensive data sets

The effects of your cooperate immediately visible in the company's business results

Possibility to publish your results

Cooperation based on B2B contract or Contract of Mandate

You can cooperate 100 % remotely or choose one of our office spaces in Warsaw or Cracow.

Apply now!

You don't need to tick every box to apply. If you are passionate about digital marketing, send us your CV, and we'll review it.

Original posting on RTB House's site ↗

Listed on hirly, a job board. hirly is not the employer: RTB House is hiring for this role.

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