1 month ago

Job Summary

The MSA department is a highly multi-disciplinary group started in 2019 to tackle difficult mail delivery, spam and abuse problems. We built sophisticated systems from scratch that combine human intelligence and machine learning to make tens of millions of realtime or asynchronous decisions each day. As of 2022, our three areas of focus are 1) mail delivery and spam, 2) abuse and account security, and 3) site reliability of Proton. Over the past 3 years, our custom systems have reduced spam filter misclassifications by over 50%, blocked millions of abusive bulk signups, protected hundreds of thousands of users from account compromise by attackers, and mitigated hundreds of DDoS attacks. In order to move fast with limited resources, we are organized into autonomous teams responsible for the whole system, with expertise across infrastructure, data storage, backend, frontend, machine learning, security and operational excellence. In 3 years, we grew from 2 engineers to over 30 engineers and analysts, spread across 3 continents for 24/7 coverage. We are looking for humble, mission-driven, systems-thinking people who want to make a big impact in a startup environment.

  • Minimum Qualification:Degree
  • Experience Level:Mid level
  • Experience Length:5 years

Job Description/Requirements

Job requirements

  • Deep experience with JavaScript, React, Typescript, and jQuery
  • Experience in engineering complex production systems, especially involving big data
  • Experience with RESTful APIs and WebSocket
  • Able to work autonomously and lead the whole development process, from design to QA
  • Excellent English communications, both written and spoken

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