iOS/macOS Safari WebExtensions Developer


From 3500€







About the position is the only browser extension that lets you save instantly on every purchase at our partner brands— with one click you pay less. The "Buy with Slash" button magically appears allowing users to shop with a lowered (or "Slashed") price. Slash is based in the UK and is growing globally with partners like, eBay, Udemy, AliExpress, Groupon, Microsoft, and more joining all the time.

We are looking for a iOS+JavaScript developer to help us build for Safari (Mac and iOS), and here is everything you need to know about this job.


  • Porting of the existing Chrome extension to Safari iOS and macOS
  • Development of a native iOS app, part of which will be a browser extension
  • Participation in the partner integration process, maintenance of existing integrations
  • Code performance optimization - both JavaScript extension part as well as the native app

Experience and skills

  • Experience as iOS developer from 3 years, experience with vanilla JS from 3 years
  • Outstanding knowledge of JavaScript and Swift
  • Experience building Safari WebExtensions and/or Chrome Extensions is a strong advantage, but not a requirement
  • Deep understanding of how modern web browsers work, you know exactly how browser runs and renders an SPA (really). Chrome’s Dev Tools is your second self
  • Knowledge of base iOS SDK frameworks
  • Experience with complex JavaScript apps, understanding of the NPM ecosystem
  • Experience with RESTful APIs, desire to participate in designing new APIs from scratch
  • You can design an architecture of the entire application and its components
  • Understanding of the Apple Development/Design guidelines and principles
  • Published apps on the App Store

What we offer

  • From 3500 EUR gross (and above)
  • Flexible work environment - our team works remotely, on a flexible work schedule. We value our team’s time and personal preferences. Do what you have to do to focus!
  • Lots of freedom in decision making and no micromanagement! We are open to new practices and ideas
  • The energetic atmosphere of a collaborative startup and an exciting opportunity to launch a game-changing product at the intersection of fintech and eCommerce
  • We can provide you with legal support for relocation to Poland

iOS/macOS Safari WebExtensions Developer

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