Posted 28 days ago

JavaScript Developer OOP - AdTech

London, Greater London | £70,000 - £80,000 per yearManaged by: Front End Web Team

JavaScript Developer / Engineer (JavaScript OOP) London / WFH to £80k

Do you have expertise with JavaScript? Would you like to work on complex systems that provide daily challenges, use the latest technologies and have the freedom to make decisions and influence the technology stack?

You could be working on the world's third largest website with 230 million users in over 200 countries.

As a JavaScript Developer you will be a senior member of a cross functional Agile development team using a range of cutting edge technology; working on highly complex, real-time, data centric AdTech systems that process billions of events and terabytes of data with real-time analytics and bidding. There's a focus on Vanilla JavaScript, with minimal use of frameworks (some React and Node.js).

Location / WFH:

You can work from home most of the time, meeting up with colleagues in swanky West London offices once a week where you can enjoy the staff restaurant and onsite gym.


  • You have expertise with Vanilla JavaScript
  • You have an active GitHub profile
  • You also have a good knowledge of CSS, HTML5
  • You have a strong knowledge of Computer Science fundamentals such as OPP, Design Patterns, Data Structures
  • You're naturally curious and enjoy problem solving
  • You're collaborative with great communication skills and Agile team experience
  • You're degree educated, Computer Science preferred

What's in it for you:

As a JavaScript Developer / Engineer you will earn a competitive salary (to £80k) plus benefits including:

  • Pension
  • Training days, e-learning courses and conferences
  • Perks such as onsite gym and restaurant, employee retail discounts, 25 days holiday

Apply now to find out more about this JavaScript Developer / Engineer (Vanilla JavaScript) opportunity.

At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

Ref: BB/20598/E/KS/240124_1706089473

Apply Now