Weights & Biases
Staff Software Engineer, Performance- Weights & Biases
Weights & Biases, San Francisco, California, United States, 94199
Staff Software Engineer, Performance - Weights & Biases
Join the role at
Weights & Biases , part of CoreWeave, the AI Hyperscaler, to help create the most powerful end‑to‑end platform for AI development, deployment, and iteration.
CoreWeave acquired Weights & Biases in 2024, merging its world‑class cloud infrastructure with Weights & Biases’ tools for experiment tracking, model optimization, high‑performance training clusters, agent building, and inference at scale. Together we aim to empower developers with a single seamless platform that covers the entire AI lifecycle.
What You’ll Do Perform performance engineering across the W&B platform and infrastructure, embedding performance thinking into every stage of development. Diagnose issues, design scalable patterns, and build tools that enable all engineering teams to deliver fast, efficient, and reliable experiences.
About The Role As a
Staff Engineer
on the Performance Engineering team, you’ll take technical ownership of complex performance challenges. Design and lead experiments to improve system scalability and latency; develop standardized benchmarking and load‑testing frameworks; drive initiatives that prevent regressions across product surfaces. Work closely with product, infrastructure, and SRE teams to measure, understand, and continuously improve performance.
Who You Are
8+ years as a software engineer, including at least 2 years focused on performance optimization, systems scalability, or observability.
Proficiency in Go, Python, or TypeScript, with strong systems‑level debugging and profiling skills.
Deep understanding of distributed systems concepts (caching, queuing, concurrency, resource contention, etc.) and their performance implications.
Experience designing and implementing load testing, benchmarking, or performance regression frameworks (e.g., Locust, Gatling,6).
Familiarity with metrics and tracing systems (Prometheus, Grafana, OpenTelemetry, Datadog, etc.) and performance data analysis.
Experience integrating performance measurement into CI/CD pipelines.
Ability to design experiments, analyze large datasets, and draw actionable conclusions.
Proven track record of driving cross‑functional technical initiatives from design through adoption.
Preferred
Prior experience in performance engineering or SRE at scale (e.g., supporting multi‑region, high‑throughput systems).
Familiarity with frontend performance monitoring and web vitals.
Experience building developer‑facing tools or frameworks.
Background in data systems, observability, or ML infrastructure.
Experience contributing to open‑source performance or benchmarking tools.
Qualities
Love turning messy, complex performance problems into clear, data‑backed stories that lead to concrete action.
Curiosity about how systems behave under realistic load and enjoy building experiments that reveal underlying behavior.
Expertise in turning deep technical insights into tools and processes that empower other engineers.
Satisfaction in long‑term, cross‑team collaboration—helping others succeed by embedding performance thinking into workflows.
Energy from bridging theory and practice: designing scalable architectures and implementing them.
Deep care for measurement, iteration, and continuous improvement—preventing bottlenecks from recurring.
Compensation & Benefits Base salary range: $188,000 to $275,000. Final compensation will also include discretionary bonus, equity awards, and a comprehensive benefits program (eligibility based).
Benefits include:
Medical, dental, and vision insurance – 100% paid for by CoreWeave
Company‑paid life insurance
Voluntary supplemental life insurance
Short‑ and long‑term disability insurance
Flexible Spending Account (FSA)
Health Savings Account (HSA)
Tuition reimbursement
Employee stock purchase program (ESPP)
Mental wellness benefits via Spring Health
Family‑forming support from Carrot
Paid parental leave
Flexible, full‑service childcare support with Kinside
401(k) with generous employer match
Flexible PTO
Catered lunch each day in offices and data centers
Causal work environment
Work culture focused on innovative disruption
California Consumer Privacy Act California applicants only: this position is governed by the California Consumer Privacy Act.
Equal Opportunity CoreWeave is an equal opportunity employer, committed to fostering an inclusive and supportive workplace. All qualified applicants and candidates will receive consideration for employment without regard to race, color, religion, sex, disability, age, sexual orientation, gender identity, national origin, veteran status, or genetic information.
Accommodations CoreWeave will ensure that qualified applicants and candidates with disabilities are provided reasonable accommodations for the hiring process, unless such accommodation would cause an undue hardship. If reasonable accommodation is needed, please contact careers@coreweave.com.
Export Control Compliance
Applicant must be a U.S. person (U.S. citizen or national, lawful permanent resident, refugee, or asylee).
Or eligible to access export‑controlled information without required export authorization.
Or eligible and likely to obtain required export authorization from the U.S. government agency.
CoreWeave may decline to pursue export licensing for legitimate business reasons.
#J-18808-Ljbffr
Weights & Biases , part of CoreWeave, the AI Hyperscaler, to help create the most powerful end‑to‑end platform for AI development, deployment, and iteration.
CoreWeave acquired Weights & Biases in 2024, merging its world‑class cloud infrastructure with Weights & Biases’ tools for experiment tracking, model optimization, high‑performance training clusters, agent building, and inference at scale. Together we aim to empower developers with a single seamless platform that covers the entire AI lifecycle.
What You’ll Do Perform performance engineering across the W&B platform and infrastructure, embedding performance thinking into every stage of development. Diagnose issues, design scalable patterns, and build tools that enable all engineering teams to deliver fast, efficient, and reliable experiences.
About The Role As a
Staff Engineer
on the Performance Engineering team, you’ll take technical ownership of complex performance challenges. Design and lead experiments to improve system scalability and latency; develop standardized benchmarking and load‑testing frameworks; drive initiatives that prevent regressions across product surfaces. Work closely with product, infrastructure, and SRE teams to measure, understand, and continuously improve performance.
Who You Are
8+ years as a software engineer, including at least 2 years focused on performance optimization, systems scalability, or observability.
Proficiency in Go, Python, or TypeScript, with strong systems‑level debugging and profiling skills.
Deep understanding of distributed systems concepts (caching, queuing, concurrency, resource contention, etc.) and their performance implications.
Experience designing and implementing load testing, benchmarking, or performance regression frameworks (e.g., Locust, Gatling,6).
Familiarity with metrics and tracing systems (Prometheus, Grafana, OpenTelemetry, Datadog, etc.) and performance data analysis.
Experience integrating performance measurement into CI/CD pipelines.
Ability to design experiments, analyze large datasets, and draw actionable conclusions.
Proven track record of driving cross‑functional technical initiatives from design through adoption.
Preferred
Prior experience in performance engineering or SRE at scale (e.g., supporting multi‑region, high‑throughput systems).
Familiarity with frontend performance monitoring and web vitals.
Experience building developer‑facing tools or frameworks.
Background in data systems, observability, or ML infrastructure.
Experience contributing to open‑source performance or benchmarking tools.
Qualities
Love turning messy, complex performance problems into clear, data‑backed stories that lead to concrete action.
Curiosity about how systems behave under realistic load and enjoy building experiments that reveal underlying behavior.
Expertise in turning deep technical insights into tools and processes that empower other engineers.
Satisfaction in long‑term, cross‑team collaboration—helping others succeed by embedding performance thinking into workflows.
Energy from bridging theory and practice: designing scalable architectures and implementing them.
Deep care for measurement, iteration, and continuous improvement—preventing bottlenecks from recurring.
Compensation & Benefits Base salary range: $188,000 to $275,000. Final compensation will also include discretionary bonus, equity awards, and a comprehensive benefits program (eligibility based).
Benefits include:
Medical, dental, and vision insurance – 100% paid for by CoreWeave
Company‑paid life insurance
Voluntary supplemental life insurance
Short‑ and long‑term disability insurance
Flexible Spending Account (FSA)
Health Savings Account (HSA)
Tuition reimbursement
Employee stock purchase program (ESPP)
Mental wellness benefits via Spring Health
Family‑forming support from Carrot
Paid parental leave
Flexible, full‑service childcare support with Kinside
401(k) with generous employer match
Flexible PTO
Catered lunch each day in offices and data centers
Causal work environment
Work culture focused on innovative disruption
California Consumer Privacy Act California applicants only: this position is governed by the California Consumer Privacy Act.
Equal Opportunity CoreWeave is an equal opportunity employer, committed to fostering an inclusive and supportive workplace. All qualified applicants and candidates will receive consideration for employment without regard to race, color, religion, sex, disability, age, sexual orientation, gender identity, national origin, veteran status, or genetic information.
Accommodations CoreWeave will ensure that qualified applicants and candidates with disabilities are provided reasonable accommodations for the hiring process, unless such accommodation would cause an undue hardship. If reasonable accommodation is needed, please contact careers@coreweave.com.
Export Control Compliance
Applicant must be a U.S. person (U.S. citizen or national, lawful permanent resident, refugee, or asylee).
Or eligible to access export‑controlled information without required export authorization.
Or eligible and likely to obtain required export authorization from the U.S. government agency.
CoreWeave may decline to pursue export licensing for legitimate business reasons.
#J-18808-Ljbffr