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Signifyd | Backend Engineer, Machine Learning Engineer, DevOps Lead Engineer | San Jose www.signifyd.com Our engineers build systems that catch bad guys. Using all available payment, user, and machine data, we have to separate legitimate credit card transactions from fraudulent in under 400ms. That means doing just-in-time mash-ups of internal data with external APIs and reducing it all into a single score with a few critical insights for end-users. To solve this problem, we're looking for world-class engineers who are eager to learn, adopt, and contribute to a reactive style of programming. The tools you build will immediately impact the 5000+ merchants that already rely on Signifyd to help them grow without fear of fraud. Our stack: Java, Python, Cassandra, MySQL, Solr, Apache Spark, Play! framework, Linux, Docker, AWS Apply here: https://www.signifyd.com/careers/