Software Engineer (Ray Core) (San Francisco)

About Anyscale:At Anyscale, we're on a mission to democratize distributed computing and make it accessible to software developers of all skill levels. We’re commercializing Ray, a popular open-source project that's creating an ecosystem of libraries for scalable machine learning. Companies like OpenAI, Uber, Spotify, Instacart, Cruise, and many more, have Ray in their tech stacks to accelerate the progress of AI applications out into the real world.With Anyscale, we’re building the best place to run Ray, so that any developer or data scientist can scale an ML application from their laptop to the cluster without needing to be a distributed systems expert.Proud to be backed by Andreessen Horowitz, NEA, and Addition with $250+ million raised to date.About the roleRay aims to provide a universal API for building distributed applications. To achieve this goal requires a distributed system with high levels of performance and reliability. We're looking for engineers with systems software experience that are interested in contributing to the Ray backend.About the Ray Core TeamThe Ray Core team develops and maintains the Ray C++ backend (e.g., distributed scheduler, language runtime integration, I/O and memory subsystems). We are responsible for the reliability, scalability, and performance of Ray as well as ensuring that Ray provides the right feature set to support higher level libraries and use cases. The team works on a balance of new features / distributed libraries, test infra improvements, debugging, and longer-term architectural improvements to Ray.A snapshot of projects you can work on:Optimizing performance of large-scale workloads on RayStability and stress testing infrastructureImproving fault tolerance (HA)As part of this role, you will:Leading cross-team projects while mentoring junior team membersDevelop high quality open source software to simplify distributed programming (Ray)Identify, implement, and evaluate architectural improvements to Ray coreImprove the testing process for Ray to make releases as smooth as possibleCommunicate your work to a broader audience through talks, tutorials, and blog postsWe'd love to hear from you if you have:At least 5 year of relevant work experienceExperience in building scalable and fault-tolerant distributed systemsExtensive experience working in C/C++ and on low level operating systemsSolid background in algorithms, data structures, system designKnowledge of distributed model training and inference (e.g. tensor parallel, pipeline parallel) is preferredKnowledge of GPU programming is preferredAnyscale Inc. is an Equal Opportunity Employer. Candidates are evaluated without regard to age, race, color, religion, sex, disability, national origin, sexual orientation, veteran status, or any other characteristic protected by federal or state law.Anyscale Inc. is an E-Verify company and you may review the Notice of E-Verify Participation and the Right to Work posters in English and SpanishCompensation Range: $215K - $265KLocationSan Francisco; Palo AltoEmployment TypeFull timeLocation TypeHybridDepartmentEngineeringCompensation$215K – $265K • Offers EquityAt Anyscale, we take a market-based approach to compensation. We are data-driven, transparent, and consistent. As the market data changes over time, the target salary for this role may be adjusted.This role is also eligible to participate in Anyscale's Equity and Benefits offerings, including the following:Stock OptionsHealthcare plans, with premiums covered by Anyscale at 95%401k Retirement PlanWellness & Education StipendPaid Parental LeaveFertility BenefitsPaid Time OffCommute reimbursementIn the office? Lunch is on us!