LaunchDarklyHiring

Backend Software Engineer, SDK

  • Remote, United States
  • Senior
  • Posted 10 days ago
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In one line

Backend role on an SDK team, writing client libraries in several languages for a feature flagging product used at very large scale.

About the role

Ownership covers new features in the client libraries, their performance and resilience, and the open source repos behind them. Work sits close to product decisions and to customers who depend on these libraries every day.

At a glance

Pay
Not stated in the posting
Remote scope
Remote, United States
Seniority
Senior
Skills
Go, Ruby, Python, Java, Erlang
Posted
19 Oct 2026
Last checked
29 Oct 2026

What you will do

  • Add features and fixes to client libraries so they meet customer needs for speed and resilience
  • Work with engineering and product colleagues to plan and ship major features
  • Keep the open source repositories healthy and current
  • Spot gaps and argue for better practices in how the libraries are built
  • Take part in technology and product decisions for the SDKs

What they look for

  • Hands-on experience building libraries or packages that other developers use
  • Comfort switching between languages quickly
  • Five or more years with at least two of.NET, Go, Ruby, Python, NodeJS, Java
  • Solid computer science fundamentals
  • Able to work independently on hard problems inside a collaborative team

Nice to have

  • Exposure to C++, Erlang, Haskell or Lua
  • Work with AI or observability SDKs
  • Mobile development background

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Claude

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Muse

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Message for Muse
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Questions about this job

Is this job fully remote, and from where?

Yes, it is listed as remote, aimed at candidates in the United States.

What does this job pay?

The posting does not state a salary, so there is no figure to quote.

What experience is needed?

It is a senior role. The posting asks for: hands-on experience building libraries or packages that other developers use; comfort switching between languages quickly; five or more years with at least two of.NET, Go, Ruby, Python, NodeJS, Java. Skills it names include Go, Ruby, Python, Java.

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