• Продукт
  • Є медстрахування
  • Есть Equity
  • Startup
  • Back-End
  • Python
  • Python
  • Sql
  • Django
24.09.21

Про роботу

Who are we?

Preply is a fast growing product company at an early stage of development, backed by Europe’s most prominent investors. 270+ people are currently working on building a global human-to-human online tutoring marketplace with locations in Kyiv and Barcelona.

We have more than 37 nationalities on board, that work in small cross-functional teams to continuously improve and scale user experience. We offer remote working days and the possibility to use our platform for self-development. We challenge each other to learn more and faster, while promoting creative power and free will. Personal growth, a friendly and hierarchy-free atmosphere are guaranteed!

Openness, effectiveness and global mindset are the main characteristics of our people. Our goal is to make Preply a leading platform in online tutoring that will help people from all over the world achieve their life goals faster!

Join our Experimentation Squad!

You, as a part of Experimentation Squad, will develop systems that are used by all product and platform squads in their daily work in the decision making process; tackle problems that occur in highly loaded systems, such as cross-experiment correlation, data consistency, event deduplication, etc.; design and monitor architecture in a way that will guarantee stability and reliability in the highly variative environment where 60+ developers deploy production 50+ times a day.

This position is in the intersection of Data, Development & Research. You’ll use Data skills to write ETLs, setting up alerts on data. Research skills will help to dive deeper in the data and experiments, to identify what is going wrong, how to fix it and how to prevent it from happening again in the future. Finally, you’ll use Dev skills to automate routine, iterate on our A/B system core and A/B visualisation tool.

We work in small teams, thus you will be able to influence system design and contribute a lot in the company's growth, also we promote self-direction to work on meaningful projects, while we also strive to create an environment that provides the support and mentorship needed to learn and grow.

Visit our Tech Radar to learn more about the technologies we use at Preply.

Our Engineering Blog: medium.com/preply-engineering

Open source github.com/...​reply/graphene-federation

As a Back-end Engineer, you will:

  • Establish credibility with the quality of the a/b testing system
  • Own Data pipelines and ensure Data consistency
  • Support & develop a/b testing interpretation tools
  • Collaborate with product teams to help them tackle technical issues with a/b testing
  • Develop new ways of a/b testing (SEO a/b testing, etc.)


What we are looking for:

  • Strong knowledge of Python, at least 3+ years experience.
  • SQL hands-on experience
  • Understanding basics of statistical analysis: p-value, null hypothesis, confidence interval - something you should be familiar with
  • A passion for analysing data to inform decisions
  • Addiction to measuring and monitoring
  • High code-testing standards
  • Readiness to take responsibility of systems that directly impact company decision making process

Nice to haves:

  • Experience with a/b testing in production environments
  • AirFlow, Redshift, Kafka, Django


What we offer:

  • An opportunity for personal and professional growth, supported by high functioning teams, stellar investors and the exciting challenges that come with joining a company at the start of its growth trajectory.
  • Easy-to-reach location, brand new office in Kooperative.
  • An environment free of bureaucracy and corporate constraints; a culture where your opinion is highly valued and appreciated.
  • An open, collaborative, dynamic and international culture.
  • A monthly allowance for self-development on Preply.com.
  • A competitive financial package, with generous leave allowance and health insurance.
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