Data Engineer

Job description

At Proton, 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. ProtonMail 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 New York Times journalists, some of the world’s largest corporations, and millions of ordinary citizens. The world is adopting our products at an accelerating pace. Whether it’s in New York, or at the front lines of the global struggle for freedom and democracy in Hong Kong, Belarus, and Myanmar, the work we do saves lives and is transforming the world. Our team is diverse and dynamic, representing over 30 different nationalities, with offices in Geneva, Zurich, Prague, London, Vilnius, Skopje, and Taipei, employing people around the world.

Proton is a mission driven company. We’re deeply committed to enabling freedom online and ensuring the internet serves the interests of all people. Our technologies provide trusted ways for people to be secure online and in control of their information at all times. The world is adopting our products at an accelerating pace. Help us bring it from tens of millions of users, to billions of users. We’re creating one of the world’s most impactful tech companies.

Purpose of the role

We are looking for Data Engineers at various levels to work in our Vilnius office or remotely from Barcelona. You will help maintain, improve and expand the data ingestion and transformation workflows so we can take our data analysis to the next level. 

Over the past few years, Proton Technologies AG 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 anonymized 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 financial 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!


What you will do

  • Prepare the necessary components to populate the data lake ingesting logs from Apache Kafka using Spark, with a special focus on schema handling and data quality checking
  • Design, integrate, and document new components for data extraction and analysis on our big data platform
  • Prepare all of the necessary data transformations to populate data into a warehouse optimized for reporting
  • Upgrade the current ETL process architecture to enable 100x scaling
  • Build a repository of curated, well-documented metrics for business uses
  • (depending on seniority) Mentor and guide junior team members

Job requirements

  • BSc in Computer Science or related technical discipline
  • 2+ years (5+ years for senior positions) of relevant work experience
  • Understanding of data warehouse best practices in Big Data space
  • Experience with the relevant programming languages - Scala, Python
  • Experience with Apache Spark
  • Excellent SQL knowledge, experience with ClickHouse is a plus
  • (depending on seniority) Mentoring experience


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. Our 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 a 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.


Proton does not accept unsolicited resumes from any sources other than directly from a candidate. Proton will not pay a fee for any placement resulting from the receipt of an unsolicited offer, even in a situation when the relevant candidate is employed by Proton.