ProtonMail 質子科技有限公司 work environment photoProtonMail 質子科技有限公司 work environment photo

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.

Proton 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.

About the team
While the open nature of email is great for interoperability, accessibility and freedom from centralized control, it also creates challenging spam and abuse problems. For instance, a significant percentage of incoming emails to ProtonMail users are spam, some of which are dangerous phishing attacks. Also, as a free email service open to all, ProtonMail inevitably attracts signups from bad actors who abuse our excellent email delivery and reputation.
You will join a growing abuse team to build and operate sophisticated anti-spam and anti-abuse systems. This team contains a mix of senior software engineers and devops/site reliability engineers.
Your work will directly improve the user experience and digital security of millions
of people around the world. You should have extensive experience designing and developing real-time analysis and prediction systems.

What you will do

  • Improve our abuse detection and prevention systems (bulk signups, compromised accounts)
  • Fight spam, including internal end-to-end encrypted emails
  • Protect users against various attacks and prevent compromised accounts
  • Train abuse desk team to effectively respond to abuse and to help affected users
  • Automate, deploy, monitor, and troubleshoot critical anti-abuse systems


  • Software engineering experience with production systems (Python, PHP, JavaScript)
  • Experienced with data analysis and machine learning (anomaly detection, time series, clustering, NLP)
  • Bonus: worked with big data storage and web services (MySQL, Redis, Kafka, Elasticsearch)

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.

Personal Invitation Link

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About us

我們是一群想爭取線上公民自由權的科學家、工程師與開發人員。這是我們建立 ProtonMail 的原因,ProtonMail 是一個簡單易用的加密電子郵件服務,並提供內建端對端加密以及許多最新的安全功能。我們的目標是要建立一個尊重隱私的網際網路,並能安全地防範網路攻擊。


We are scientists, engineers, and developers drawn together by a shared vision of protecting civil liberties online. This is why we created ProtonMail, an easy to use secure email service with built-in end-to-end encryption and state of the art security features. Our goal is to build an internet that respects privacy and is secure against cyberattacks. We are committed to developing and widely distributing the tools necessary to protect your data online. Our team combines deep mathematical and technical knowledge from the world's top research institutions with expertise in building easy to use user interfaces. Together, we are building the encrypted communication technologies of the future.


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