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Senior Frontend Engineer

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Signifyd leads the world in bringing the insights, innovation and compassion required to foster fearless commerce in a time of increasing digital threats. Working with some of the industry’s most recognizable retailers and brands, we are focused on using technology to enhance customer lifetime value and protect enterprises from fraud so they can focus on growing their business. 

We process billions in ecommerce transactions annually through our Commerce Network of thousands of merchants selling in more than 100 countries. We focus every day on harnessing machine learning and artificial intelligence in more powerful ways to maximize our customers’ revenue and their security. None of that happens without the right people.

Our team’s strength is in its diversity and its acceptance of new ideas and new ways to look at old challenges. We are dedicated disruptors designing a new world of commerce at scale. We know humans are not one-dimensional and we celebrate the uniqueness each individual brings to the problems we solve and the culture we create.

Oh, and a few particulars for this role:

To enable all the market leading services we offer our customers, we are continually developing a host of apps to both support our internal operations and provide our customers with visibility and control at all levels.

As a Signifyd FE Dev you will be helping build new Apps as well as maintain and develop our existing ones using cutting edge modern JS, Typescript, and React. Of course we have the occasional crusty AngularJS app kicking around, so you’d also be helping to rewrite these and drive our codebase forward into React nirvana.

We’re using a stack that would make any FE dev cry tears of joy, but what’s better is you can have your say; we’re always adapting and experimenting to keep up with modern technology and patterns, so we would welcome someone who has ideas and isn’t afraid to try things out!

Some of the things we are looking for:

  • Excellent programming skills in Javascript (ESNext)
  • Experience with enterprise ready React applications (or other modern framework) 
  • A solid understanding of HTML and CSS.
  • Experience with one or more build tools such as Webpack, Grunt, Gulp, etc.
  • A test focused approach to front-end development
  • Comfortable moving between libraries / patterns / technologies
  • Experience using Git in a collaborative environment

Some things that would be nice to have:

  • Experience/knowledge of functional programming in Javascript
  • Experience with typed Javascript using Flowtype or Typescript
  • Experience with REST API and 3rd party APIs, OAuth, E-commerce plugins
  • Some server-side development experience with Python, Java, NodeJS or similar language/framework
  • Data visualization experience using Google Charts or similar toolset

Some of the stack we’re currently using:

  • ReactJS
  • Typescript
  • Easy Peasy (State Management)
  • Ant Design
  • Webpack/Babel/TSLint
  • MobX
  • Recompose
  • Lodash/Lodash-FP
  • Jest/Enzyme/Cypress


Tools/libraries/languages we have been keeping an eye on:

  • ELM
  • ReasonML
  • Preact/Inferno/React Fiber
  • gRPC-web/GraphQL

We don’t want to brag, but we will look after you. Here’s some of what we offer:

  • A competitive base salary
  • An equally competitive equity package
  • Annual performance related bonus (10% performance related)
  • Pension matched up to 8%
  • ‘Day one’ access to private Healthcare, Dental and Optical insurance scheme for you and your whole family
  • 25 days of annual leave (plus 10 stat)
  • Enhanced maternity and paternity pay
  • Top of the range equipment and lots of Signifyd swag
  • Monthly Signifyd social events organised by our social committee

We are committed to equality of opportunity for all staff and applications from individuals are encouraged regardless of age, disability, sex, gender reassignment, sexual orientation, pregnancy and maternity, race, religion or belief and marriage and civil partnerships.


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