Front-end Engineer

Crushing online payment fraud at Big Data scale

Job details

  • Full-time
  • map markerLisbon, PT
  • cardRequires Work Permit
    Requires that you're a citizen or have a valid work permit / visa sponsorship to work in the country in which this position is based.
  • routeIntermediate
  • routePortuguese
    Preferred spoken language

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Feedzai is AI. We’re coding the future of commerce with a leading platform powered by artificial intelligence and big data. Founded and developed by data scientists and aerospace engineers, Feedzai has one critical mission: make commerce safe. The world’s largest banks, payment providers and retailers use Feedzai’s machine learning technology to manage risks associated with banking and shopping, whether it’s in person, online or via mobile devices.

If you like to build silky smooth web user interfaces and know the ins and outs of Javascript, HTML5, the DOM and CSS you’ll fit right in. Join us in disrupting the hot market of digital payments and online fraud prevention!

This position is also available to Coimbra and Porto.


  • Design and implement modern UI components in Feedzai’s SaaS product
  • Build the JS libraries and frameworks we use to build modern client-side applications
  • Figure out the application infrastructure to support our web app
  • Write reusable and testable code using the best tools for the job and participate in code reviews
  • You’ll be hyper technical - deep understanding and optimization are in our blood

Main requirements

  • Expert knowledge of JavaScript (not just jQuery) and web technologies (HTML5, CSS) is key!
  • Previous experience with emerging JS app frameworks - at least two of the following: Backbone.js, AngularJS, Ember.js, React.js, etc.)
  • Ability to tease out the right HTML and CSS for a given design
  • Fluency in English, both written and spoken
  • MSc degree in Computer Science in a top university

Nice to have

  • Can undertake client and server development, creating the APIs that drive the web app (Scala or Java server experience is valued)
  • Experience in web performance optimization and profiling
  • Significant contributions to OSS projects
  • Attention to detail and an eye for quality, when building a user-facing feature
  • Someone who can bring his/her ideas into the team and is able to work out solutions to tough problems autonomously


  • Health insurance
  • Free fruit
  • International Free Coffee Selection
  • Weekly workplace gymnastics

Apply now

Sign up to apply

Or sign up to refer and earn a reward of €500