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Backend Software Engineer, SDK

LaunchDarkly· Engineering
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Remote$145.5k - $235.4kFull-timePosted 6d ago

About the role

Software Engineer on LaunchDarkly’s SDK team responsible for building feature-rich SDKs across multiple platforms with a focus on performance, concurrency, and resiliency, enabling customers to feature-flag their code and interact with our open-source SDKs.

Responsibilities

  • Contribute to development for SDKs in supported platforms: Implement new features and improvements to meet customer performance and resiliency requirements; Keep up to date with the latest development practices
  • Collaborate with engineering and product teams to drive the implementation and release of major features
  • Actively maintain our open-source repositories
  • Identify areas of improvement and advocate for best practices
  • Have an active voice in shaping both technology and product decisions

Qualifications

  • Demonstrable experience building libraries and packages used by other developers
  • Polyglot background with an ability to context switch between languages quickly
  • 5+ years experience with at least two of the following: .NET/Go/Ruby/Python/NodeJS/Java
  • Experience with C++/Erlang/Haskell/Lua is a plus
  • AI SDKs and Observability SDKs experience is a plus
  • Mobile development experience is a plus
  • Strong computer science fundamentals
  • Committed to working in a communicative, collaborative environment
  • Self-starter and problem solver, willing to solve difficult problems and work independently when necessary
  • Strong testing background: experience building unit, integration, load tests, and benchmarks
  • Experience writing production-ready code with emphasis on quality and maintainability
  • Experience contributing to open-source software

Skills

Required:Libraries and packages developmentPolyglot programmingMultiple languages (.NET/Go/Ruby/Python/NodeJS/Java)Open-source contribution

Benefits

  • RSUs
  • health, vision, and dental insurance
  • mental health benefits
  • salary with geographic pay zones
Last updated Oct 21, 2026. Interested? Apply on the company site.
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