We are one of the UK’s top 25 fastest growing start-ups. We’re an independent marketing technology agency based in London and New York, on a mission to combine technology and creativity to solve brands’ problems. We bring together data, technology, content, and paid-media to drive revenue for brands. Our clients include Spotify, Google, Facebook, Nike, Waze, Just Eat, ASOS, Pret A Manger and adidas. Since being founded in 2014, Byte has grown to more than 100 brilliant people.

 We’re looking for a Principal Engineer to join the mission.


Byte is looking for an experienced engineer to join the London team. The successful candidate will be growth focussed with experience in the practical application of new technologies, and capable of leading the engineering team. You will be working with the Director of Technology and the co-founders, supported by the engineering team.

Please send your application to


  • Assess new business and growth opportunities (products, projectware, new industries, new technologies initially voice, automation and chatbots)

  • Design, build and maintain Node.js based applications

  • Work with the technical leadership to future-proof the team against skills deficits

  • Own and complete technical specification documents, act as escalation and mediation point for tech delivery challenges (including vendor assessment questionnaires)

  • Work with conversation designers to implement Facebook Messenger chatbots (and other messaging platforms)

  • Maintain the health of production systems

  • Work with other teams to think up new tools and ways to improve business efficiency

  • Experience leading engineering teams

  • Deep digital technology expertise including:

  • Javascript, Nodejs, DevOps/Automation

  • Platform development and integration (bespoke and package)

  • API development / integration

  • Best practice engineering standards and process

  • REST Web services & API Technology

  • SQL (e.g. Postgres)

  • Cloud Services (e.g. Amazon AWS, MS Azure, Google Cloud, IBM Bluemix)



  • A functional programming language (e.g. Elm, Purescript)

  • Typescript

  • Unix/Linux systems administration

  • Machine learning (e.g. Tensor Flow)

  • Natural language recognition (e.g. API.AI, IBM Watson)



To complement the team dynamic:

–     Sense of humour
–     Self-starting and proactive
–     Easily bored and curious
–     No ego
–     Extremely motivated
–     Positive mental attitude
–     Professional, reliable and dependable
–     Adaptable and thrives with variety and change
–     Calm and patient under pressure


We can offer a degree of responsibility and flexibility that’s hard to find in a role anyplace else. You will become an integral member of our team, and you will gain experience you wouldn’t get at a big corporate agency. You’ll be encouraged to follow your passions. You’ll be supported when you want to try something new.

You’ll be working directly with founders who are experienced innovators and who understand how important it is for you to grow and learn.

You’ll get 25 paid holidays, breakfast, booze, and day off on your birthday.

Most of all, you’ll help create the company you want to work for.

Please send your application to