146K–235K USD / year
Backend Software Engineer, SDK
BackendRemote — United States
Published on 2026-10-19
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About this role
Build and maintain LaunchDarkly SDKs used for trillions of feature-flag evaluations. Develop resilient, high-performance developer libraries across multiple programming languages, and help shape SDK technology and product decisions.
About the company
LaunchDarkly is a feature management platform that lets teams release, target, and control product features with flags without redeploying code.
The team
LaunchDarkly SDK team, distributed across Eastern and Pacific time zones.
Stack
.NETGoRubyPythonNode.jsJavaC++Erlang
What you'll do
- Develop SDKs for supported platforms, improving features, performance, and resiliency
- Collaborate with engineering and product teams to deliver major features
- Maintain open-source SDK repositories
- Identify improvements and advocate for engineering best practices
- Contribute to technology and product decisions
What we're looking for
- 5+ years of experience with at least two of .NET, Go, Ruby, Python, Node.js, or Java
- Experience building libraries and packages for other developers
- Ability to work across multiple programming languages
- Strong computer science fundamentals
- Experience with unit, integration, and load testing, and benchmarks
- Write production-quality, maintainable code
- Experience contributing to open-source software
- Communicative, collaborative, and able to solve problems independently
Nice to have
- C++, Erlang, Haskell, or Lua
- Experience with AI SDKs or observability SDKs
- Mobile development
Benefits
- Restricted Stock Units (RSUs)
- Health, vision, and dental insurance
- Mental health benefits