JavaScript/SDK Engineer

London, England, United Kingdom · Engineering


Permutive is looking for a Software Engineer to help connect our real-time data management platform to the rest of the world.

Our SDK is deployed on our customers websites, and is responsible for tracking billions of user events every day, syncing with our cloud infrastructure, and reacting to real-time events on-site. This code runs on millions of devices every day, and as a core part of the Permutive platform it is essential that it is an efficient, performant and well maintained codebase.

The SDK itself is written in TypeScript, a statically typed language which transpiles to JavaScript. We are looking for an engineer to take full ownership of this part of our product - maintaining the roadmap, planning new features and seeing them through to deployment. Due to the scale we operate at, our SDK is computationally complex and presents some interesting engineering challenges. There is scope for exploring new web technologies such as WebAssembly in the future.

An ideal fit would be a candidate with a Computer Science background, who perhaps plans to be a co-founder and wants to get a deeper understanding of early stage startups. Or you'll be a more experienced engineer with some JavaScript experience, who is keen to join a growing engineering team and make a real difference. Either way you'll be excited by the opportunity to join a fast-growing start-up, in a role where you'll be able to take ownership of a core part of the platform.

Who We Are

We’re a small team trying to make big data actionable by anyone. We believe that enterprise companies build clunky platforms which make big data confusing, frustrating and boring. Manipulating billions of data points should feel like you’re being plugged into the Matrix; not into a 90s accountancy package.

Our technology is fundamentally different. Every day we process billions of events across hundreds of millions of users - and we give results in milliseconds. We’ve built the world’s fastest Data Management Platform and the implications are huge.

Revenue is growing super fast; we’re working with flagship publishers and marketers; and we’re beating billion dollar competitors in market. On route to this, we’ve been backed by some of the world’s best investors, including Y Combinator, EF and Octopus Ventures.

Behind the scenes our goal is to build an incredible company with an extraordinary culture. We’re looking for people who are excited by growth, embrace responsibility and are excited by enormous challenges. It’s a really exciting time to join, experience start-up life and shape who we become.

On a day-to-day basis you will:

As an early hire you will also have the opportunity to be exposed and contribute to every aspect of the business, from product decisions and development processes to strategy.


We think to be brilliant in your role you really need to have:

It would be a plus if you have any of these:


In our mind the real benefit is to join a team where you have a laugh together, have a huge personal impact on decisions and get excited about things together. It’s that incredible team feeling of ‘You’re my team and we’re gonna smash this’.

As a VC backed start-up we hope you’ll gain a huge amount from working with our team. And, of course, there’s other perks too.

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