Senior Data Scientist

Job description

Our company

At Proton Technologies AG, we envision an internet where privacy is the default, and we’re building ways to help all people secure their digital lives and take control of their data.

Proton Technologies AG was founded in 2014 by a group of scientists who met at the European Organization for Nuclear Research (CERN). And since its inception, the company has grown at a fast pace and today has over 40 million users. Our principal product, ProtonMail, is the world’s largest secure email service. Our second product, ProtonVPN, is one of the world’s most popular VPN services. Our vision is to build an internet platform for the protection of digital rights, and we are also developing additional products, including ProtonCalendar, ProtonDrive, and more to come.

Our users include leaders of the Hong Kong protest movement, New York Times journalists, some of the world’s largest corporations, and millions of ordinary citizens from over 180 countries. Our team is diverse and dynamic, representing over 30 different nationalities, with offices in Geneva, Zurich, Prague, Vilnius, Skopje, and Taipei. We're also considering future potential office locations such as London and Barcelona.


Our Proton Data Team

Over the past few years, Proton Technologies has established itself as a global leader in online security. Unlike most companies in the tech space, at Proton we value customer privacy above all, limiting the data collection to anonymised operational data, and making the job of the Data Team a very challenging one! The Proton Data Team is in charge of all things data in the company: from product analytics to finance metrics, including topics such as product or infrastructure performance, we leverage our on-premise custom data platform to provide support for data-driven decision making throughout the company. Come join us and help make a better internet!

About the position

We are looking for a Senior Data Scientist with strong product background to help serve Proton's user base from Geneva or remotely from Barcelona. You will collaborate with multiple product teams throughout the company and will use data to provide them with quantitative support, market understanding and strategic perspective. You will also help build and coordinate the product analytics team, and take a leading role in initiatives aimed at strengthening the analytics capabilities of the data platform.

Your responsibilities

  • Provide support and a strategic perspective to stakeholders throughout the organization, making critical and informed recommendations
  • Assemble, clean, and manage large, complex datasets
  • Use data to produce dashboards and reports
  • Be involved in growing the product analytics team
  • Provide guidance and support in the design and implementation of monitoring for product metrics to detect trends and problems
  • Design and build a well-defined, reproducible, and reliable metrics database in our data warehouse
  • Come up with new ideas on how to improve our product analytics capabilities

Job requirements


  • Masters of Science or higher degree in a quantitative discipline: statistics, mathematics, physics, engineering, finance, etc
  • 10+ years of experience working with and analyzing large, complex datasets in a business environment
  • Excellent understanding of business intelligence, marketing KPIs, and web analytics
  • Strong analytical skills and ability to translate analysis results into business recommendations
  • Very good knowledge of Python
  • Very good knowledge of SQL
  • Mentoring experience
  • Excellent written and spoken communication skills

Why you should join Proton

  • We work on interesting, challenging problems every day. There is never a dull moment.
  • Our startup culture means everyone’s opinion matters. You can have a significant impact.
  • Our rapid growth means there are many opportunities for advancement.
  • The chance to do something meaningful. Proton products protect dissidents, journalists, and activists. Our work saves lives.
  • Be part of something bigger. Millions of people and businesses around the world have embraced our idea of an Internet where privacy and security are the default. Join the privacy revolution that is changing the world.


ProtonMail uses the Recruitee recruitment platform for more effective hiring process and a better candidate experience. Your data will always be kept confidential and is not shared with any third parties. Keep in mind that you will receive emails from the email address careers@protonmail.recruitee.com or other addresses on the protonmail.recruitee.com domain.