Software Engineer (Ray Core)

Anyscale; San Francisco (CA); On-site; USD 120,000 - 160,000; Full time

Job summary

A technology firm specializing in distributed computing is seeking engineers to contribute to the Ray backend. Candidates should have experience in building scalable, fault-tolerant systems and a solid understanding of algorithms and data structures. Responsibilities include developing high-quality open source software, making architectural improvements, and enhancing testing processes. Enjoy the opportunity to communicate your work to a broader audience. Located in San Francisco, this role supports innovation in machine learning applications.

Qualifications

• At least 2 years of relevant work experience.
• Solid background in algorithms, data structures, system design.
• Experience in building scalable and fault-tolerant distributed systems.

Responsibilities

• Develop high quality open source software to simplify distributed programming.
• Identify and evaluate architectural improvements to Ray core.
• Improve testing processes for Ray.

Skills

Algorithms

Data structures

System design

Building scalable systems

Fault tolerance

Job description

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 role

Ray 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 Team

The 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 Ray
• Stability and stress testing infrastructure
• Improving fault tolerance (HA)

As part of this role, you will:

• Develop high quality open source software to simplify distributed programming (Ray)
• Identify, implement, and evaluate architectural improvements to Ray core
• Improve the testing process for Ray to make releases as smooth as possible
• Communicate your work to a broader audience through talks, tutorials, and blog posts

We'd love to hear from you if you have:

• At least 2 year of relevant work experience
• Solid background in algorithms, data structures, system design
• Experience in building scalable and fault‑tolerant distributed systems
• Knowledge of distributed model training and inference (e.g. tensor parallel, pipeline parallel) is preferred
• Knowledge of GPU programming is preferred

Anyscale 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.

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