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Machine learning researcher of ads relevance

What do we do?

As a leading Czech web company, we use AI technologies as a core of our ads system. Almost every component has a machine learning model, and our research division works on its development. Our models predict ads relevance, detect user behavior patterns, classify page content, try to understand the intention behind the search query, create time series models – this is just a small fraction of tasks which the research team meets.

A researcher’s job is not only about model training and evaluation. It is also about their debugging, data analysis, coding, design of efficient algorithms, communicating with product managers and developers who work on the models production maintenance.

An essential part of the job is continuous education, reading articles on the subject and maintaining a view on trends. The researcher can use an opportunity to do so while attending the industry leading foreign conferences.

We are an AI team of almost 20 people and we are looking for people who find their inspiration in machine learning.

What technologies do we use and how do we work?

  • Python is the base – pandas, numpy, scikit-learn etc.
  • We process big data in PySpark on the Hadoop clusters.
  • We use Hive, Tableau and jupyter notebooks for analysis.
  • We train models with TensorFlow, xGboost, Vowpal wabbit etc.
  • We manage everything with GitLab and its CI, Docker.
  • We plan our work with product managers and complete it in two-week sprints.
  • We cooperate closely with developers who develop the infrastructure and maintain the production environment.

We are looking for a person who…

  • Has a grasp of machine learning, data analysis and statistics.
  • Knows that the model optimization is only a small part of the problem – is not afraid of controlling and processing data.
  • Has a university degree in machine learning, applied math, statistics or something similar.
  • Has multiple years of practical experience in machine learning.
  • Can code well in Python and design efficient algorithms.
  • Has no problems with SQL queries. One of our fundamental technologies is Spark, so knowing it will help.
  • Can read documentation and articles on the subject in English.
  • Can work independently, communicate actively and has no problems with working in a team.

What do we offer?

  • Creative environment – you will have an opportunity to realize your own ideas and processes.
  • Big impact – you will participate in developing systems, which have thousands of daily users and affect web content for millions of users.
  • Personal development – wide range of opportunities for education in projects, dedicated educational time according to your needs, attending industry conferences, presenting research results on internal and external meetings, knowledge transfer between teams.
  • Team cooperation – you will cooperate with other researchers and research teams, mutually share information and knowledge and look for ways and solutions together.
  • Informal environment – we communicate informally and have no dress code.
Brno, Ostrava, Praha

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