Senior Front End Developer

  • Frontend
  • Permanent
  • London, UK

About what3words

Street addresses weren’t designed for 2020. They aren’t accurate enough to specify building entrances, and they don’t exist for parks, rural areas and many parts of the world. This makes it hard to find places and causes problems and inefficiencies on a global scale.

That’s why we created what3words. We divided the world into 3m squares and gave each square a unique combination of three words. It’s the easiest way to find and share precise locations.

Last year, what3words was used in 193 countries, and our monthly active users increased from 100,000 to over a million. Our tech is used by emergency services, delivery companies, ride-hailing apps and NGOs, and is integrated into the navigation systems of Mercedes-Benz cars.

Who we’re looking for

We’re looking for an experienced Senior Front End Engineer who knows code, and enjoys creating engaging experiences that people love to use. At what3words, we’re proud of our tech stack. We have 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 a collaborative and ambitious Agile team, at one of the most exciting times in this company’s life.


This role will focus primarily on the development of our map site, corporate site, developer portal and playgrounds, but we’re always looking for new platforms and products to build, opening what3words up to as many users as possible. This includes various voice assistant platforms and in-house tools & demos to assist our sales and marketing teams. You will also work closely with our product and UX teams, receiving and inputting on designs and feasibility checks, and bringing fresh ideas to make what3words a better solution.

You will have good experience of building gorgeous user interfaces on top of RESTful web APIs, using React, JavaScript, CSS. You will be able to work independently, self-motivate, collaborate well with others and keep calm 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.


We offer the following benefits to all permanent employees of what3words:

25 days holiday

Share options


Bupa Healthcare + Babylon Health

Bupa Rewards

Cycle to work

VDU eye tests

Life Assurance

Free breakfast & snacks

Birthday vouchers

Weekly lunch & learn sessions

Regular team lunches & team socials

Sports and hobbies clubs