Backend Software Engineer, SDK
LaunchDarkly · Remote - US
About this role
## Backend Software Engineer, SDK ### About LaunchDarkly Engineering LaunchDarkly helps engineering organizations ship software and AI with speed, safety, and control. Our platform enables teams to release gradually, target experiences to the right audiences, learn through experimentation, and respond quickly when risk appears. Our engineers build systems, services, SDKs, developer tools, cloud infrastructure, and product experiences. LaunchDarkly's SDKs handle trillions of feature flag evaluations daily, giving our work direct impact on software reliability worldwide. ### About the Job As a Software Engineer on LaunchDarkly's SDK team, you'll build the primary touchpoint customers interact with daily. You'll work across 35+ SDKs, contributing to feature-rich agents with strong emphases on performance, concurrency, and resiliency while following idiomatic practices for each tech stack. ### Responsibilities - Contribute to SDK development across supported platforms - Implement new features and improvements to meet customer performance and resiliency requirements - Keep up to date with latest development practices - Collaborate with engineering and product teams on major feature implementation and release - Actively maintain open-source repositories - Identify areas of improvement and advocate for best practices - Have an active voice in shaping technology and product decisions ### Basic Qualifications - Demonstrable experience building libraries and packages used by other developers - Polyglot background with ability to context switch between languages quickly - 5+ years experience with at least two of: .NET, Go, Ruby, Python, NodeJS, Java - Strong computer science fundamentals - Committed to working in a communicative, collaborative environment - Self-starter and problem solver willing to tackle difficult problems independently - Strong testing background: unit, integration, load tests, and benchmarks - Experience writing production-ready code with emphasis on quality and maintainability - Experience contributing to open-source software ### Plus Experience - C++, Erlang, Haskell, Lua - AI SDKs - Observability SDKs - Mobile development ### Logistics - Remote role with opportunities to visit Bay Area office for team offsites - SDK team spread between Eastern and Pacific time zones
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