实时媒体后端工程师

About LiveKitLiveKit is building the infrastructure layer for the agentic era of computing. Our platform gives developers everything they need to build, test, deploy, scale, and observe AI agents in production. Founded in 2021, LiveKit powers voice and agentic AI applications for OpenAI, Salesforce, Spotify, Meta, and tens of thousands of other developers, collectively facilitating billions of calls each year.About This RoleEvery call, stream, and agent conversation running on LiveKit passes through our real-time media backend. It is the layer that ingests, transforms, and delivers audio and video at a scale of billions of calls a year — and it is the foundation the rest of the product is built on.As a Backend Engineer on the real-time media team, you'll own real time media distribution end to end: the interaction with real time clients, the distributed mesh allowing fast and reliable media distribution all over the world, and the new systems that customer-facing features depend on. Today a very small team covers this surface, so the scope is unusually large for one engineer — you'll set direction on reliability, performance, and protocol adoption (including newer transports like MoQ/WARP) rather than picking up tickets.This is a role for someone who has built real time systems real customers relied on, and who wants that work to matter to the whole product rather than sit in a corner of it.You'll Thrive Here If You:obsess over crafting code that is fast, reliable, and practical for the problemare known as the go-to person for tackling tough technical problemswork hard and can build and ship fastcan clearly explain complex technical concepts to other engineersare a fast learner, frequently picking up new languages and toolsThe best way to impress us is with thoughtful Issues and/or PRs on our GitHub repos.What You'll DoOwn and operate the LiveKit SFU and real time media distribution mesh — including their reliability and on-callBuild new real time systems to support customer-facing features, from first design through productionDrive down latency and improve call quality across every session on the platformAssess and adopt modern media and transport protocols, including MoQ/WARPPartner with client SDK, infrastructure, and product teams on cloud mesh architecture and cross-cutting reliability work, and serve as the internal expert those teams consultWho You AreYou've built critical real time media systems and pipelines that real customers depended on — you wrote the code, not just the integrationYou know the WebRTC stack from the inside: ICE, DTLS-SRTP, RTP/RTCP, congestion control, SDP negotiationYou're a strong systems programmer in Go, Rust, C/C++, Java, or C# (Go preferred)You design asynchronous and multi-threaded systems, and can debug them under production loadYou communicate clearly and thrive with high individual ownership on a small teamNice to HaveContributions to Pion open-source media stackBuilt instrumentation for real-time media quality measurementDistributed systems algorithms, including consensusDesigned public-facing APIs that outside developers built onOur Commitment to YouAn opportunity to build something truly impactful to the worldContribute to open source alongside world-class engineersCompetitive salary and equity packageHealth, dental, and vision benefitsFlexible vacation policyLiveKit is an equal opportunity employer and does not discriminate on the basis of any characteristic protected by applicable law. If you require a reasonable accommodation during the application or interview process, please contact recruiting@livekit.io.