Senior JavaScript Engineer - Low price guarantee on tours and activities worldwide with a 24 hour cancellation policy

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Senior JavaScript Engineer
what3wordsITFull TimeLondonUnited Kingdom

We’re looking for an outstanding JavaScript Engineer who knows code and has proven-experience of writing it, as well as a good eye for design and can create engaging experiences that people will love to use.

You will be working in an incredibly ambitious, diverse company that is passionate about its goal: creating a global standard for talking about location.

At what3words, we’re proud of our tech stack. We have a built a massively scalable, microservices-based architecture, based around Kubernetes on AWS. You’ll be exposed to technologies such as ReactJS, Docker, Redis, AWS Lambdas, Prometheus, Grafana, Python, Athena, BigQuery, Java, Scala, C++, and Swift.

This a great opportunity to join an innovative, fast-growing Agile team, at one of the most exciting times in this company’s life.


This very much a role focused on JavaScript, developing our map site, corporate site and our upcoming highly-interactive developer site (with a “developer playground”). We have a clear separation of concerns: our frontends are generally “static” and consume APIs (these are developed by our core tech team, who work on back end systems). You will also work closely with our product and UX teams, receiving designs.

We expect a critical eye (to question designs where appropriate) and a hunger to innovate – bringing fresh ideas, and new ways to make what3words a better solution.

You have good experience of Linux, expertise in building gorgeous user interfaces on top of RESTful web APIs, using React, JavaScript, CSS. You will have the ability to lead by motivating, guiding and inspiring others, and strong experience with the hiring process.

You have the ability to work independently, self-motivate, collaborate with others and work under pressure.

What we expect:

  • Deep expertise in ES6, TypeScript, React, HTML, CSS
  • Excellent communication skills in verbal and written English.
  • A passion for software engineering and continuous learning.
  • Strong track record of building responsive sites for desktop, tablet and mobile.
  • Experience of Agile working environments.

What we would like:

  • Knowledge of GIS systems, AWS, Kubernetes, Hubspot, Google Maps or Leaflet.
  • Experience with voice integration, e.g Alexa plugin development.
  • PHP knowledge to support the WordPress CMS for the marketing site, along with maintaining various platform plugins e.g WooCommerce, Magento etc.

Tier 2 sponsorship available for candidates requiring a UK work visa

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