Posted 23 days ago

Software Engineer JavaScript TypeScript SDK API

London, Greater London | £85,000 - £100,000 per yearManaged by: Open Source Team

Software Engineer (Full Stack TypeScript SDK API) London / WFH to £100k

Are you a skilled technologist seeking complex and interesting systems to apply your skills whilst continually learning and progressing your career?

You could be joining a highly regarded provider of serverless real-time infrastructure for the Internet that processes billions of messages a day and powers everything from live chat and VoIP calls to real-time pricing and stock availability for a multitude of services around the globe.

As a Software Engineer you'll focus on developing SDKs and APIs to enable client's developers to connect with the core platform, taking ownership of a particular SDK. You'll operate across the full development lifecycle of client library software including the development of new features, formulation of API proposals and the published specifications for new features, partnering with clients to understand and deliver their requests.

The platform is written in Node with elements of Golang and Elixir; you'll use a range of technology which is client led and constantly under review, you'll be able to suggest new technologies and contribute to open source projects that the company supports or integrates into the product.

Location / WFH:

You can work from most of the time, collaborating via Slack and meeting up with the team at the dog friendly office in North London for tech talks, lunch and learn events etc.


  • You have strong JavaScript / TypeScript skills
  • You enjoy working with and picking up new technologies across the full stack e.g. Elixir, Rust, Ruby, Go, Swift, Kotlin, Flutter, Dart, Clojure, Scala, Python, PHP, React
  • You have experience of building complex SDKs and APIs
  • You have a good knowledge of HTTP, WebSockets, connectivity
  • You're an advocate of clean, well written code
  • You have excellent communication / collaboration skills, able to run client facing projects
  • You're a technologist and contributor to the open source community; you're likely to write blogs, attend tech meet-ups and conferences

Salary & benefits:

As a Software Engineer you will earn a competitive salary (to £100k) plus benefits including:

  • Your choice of kit and home-station set up
  • Health insurance
  • Pension
  • 25 days annual leave
  • Gym subsidies and more

Apply now or call to find out more about this Software Engineer / Developer (JavaScript TypeScript SDK API) 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/20449/D/KS/071123_1699367028

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