Hero Image

Senior Front-End Developer

About the role

SamKnows is the global leader in internet performance measurement. We’ve been collecting data since 2008 on all manner of metrics, from how good Netflix performance is to figuring out why Fortnite isn’t working for gamers. The SamKnows Front-End team play a crucial role in how this data is displayed on our cloud-based analytics platform for the most influential Internet Regulators and Service Providers in the world.

That’s where you come in. You’ll be working as part of our multi-functional product teams to build features and products that our users will love. If you’re self-organising, embrace agile working, are user experience focused, understand the product lifecycle and are familiar with Vue.js or React, Highcharts and Leaflet then it’s likely that you’re the perfect fit for us.

You’ll be joining a supportive and collaborative team where hard-working, determined and responsible candidates will thrive. We’re always keen to hear new ideas and feedback on processes, so someone happy to instigate change and motivated to make things better is essential.

Best of all, SamKnows is the place to change a job into a career. There are tons of opportunities to progress with additional responsibility and autonomy on offer if you want it.

Desirable Skills / Experience

  • Experience with  Vue or React.
  • Experience with UX design.
  • Data visualisation.
  • Experience working with APIs.
  • Automated testing—we're currently doing end-to-end testing with Cypress and unit testing with Jest.
  • A grounding in mathematics and statistics.

Essential Technical Skills

  • Experience with HTML, CSS, and JavaScript.
  • Experience working as part of a team.
  • Git or another version control system.
  • A willingness to contribute to process improvement


We offer the following benefits (as well as awesome colleagues, engaging work, and the opportunity to help us make the internet better for everyone)!


25 days holiday each year plus bank holidays. You can sell back any unused holiday, but we strongly encourage you to take them.

Great office location

Whether you’re working at our London office, nestled just behind the Tate Modern and a stone’s throw from Borough Market, or in Washington at Tyson’s Corner, there’s plenty of culture, eateries, drinking holes, and interesting things to do.

Flexible working

Whether your child's ill, you're waiting for a package, or you have some deep-focussed work to do, we all work from home from time to time.

Maternity and paternity leave

Paid maternity, paternity, and adoption leave, which you’re eligible for if you join SamKnows more than 13 weeks before your expected date of childbirth or adoption.


SamKnows have a private pension scheme and will contribute 5% to your pension if you contribute a minimum of 2%.

Private health & dental care

Private health insurance with AXA PP Healthcare, includes dentist and optician cover. Paid sick leave (for both your physical and mental health).

Hardware of your choice

Choose your own equipment and we’ll do our best to get them for you before you start.

Learning and training

We’ll contribute towards books, training courses, and conferences that help you learn and grow in your career here.

Interest free season ticket loan

Not for your favourite football team – for you to get into work for less! Pay back the load in your monthly pay check before tax.