Staff Software Engineer, Performance- Weights & Biases
About The Position
The Staff Software Engineer will join the Performance Engineering team at Weights & Biases, part of CoreWeave, and take technical ownership of complex performance challenges across the platform and infrastructure. The role focuses on improving scalability and latency, creating standardized benchmarking and load-testing frameworks, and preventing performance regressions across product areas. The engineer will collaborate with product, infrastructure, and SRE teams, combining investigation, architecture, and enablement to help teams measure, understand, and continuously improve system performance. Performance Engineering works to ensure systems and products scale as usage grows. The team integrates performance considerations throughout development by diagnosing issues, designing scalable patterns, and building tools that help engineering teams deliver fast, efficient, and reliable experiences. Its goal is to make performance a shared responsibility through data, automation, and collaboration.
Requirements
- At least 8 years of experience as a software engineer, including at least 2 years focused on performance optimization, systems scalability, or observability.
- Proficiency in at least one of Go, Python, or TypeScript, with strong systems-level debugging and profiling skills.
- Deep understanding of distributed systems concepts, such as caching, queuing, concurrency, and resource contention, and their performance implications.
- Experience designing and implementing load testing, benchmarking, or performance regression frameworks.
- Familiarity with metrics and tracing systems 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.
Nice To Haves
- Prior experience in performance engineering or SRE at scale, such as 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.
Responsibilities
- Take technical ownership of complex performance challenges across the W&B platform and infrastructure.
- Design and lead experiments to improve system scalability and latency.
- Develop standardized benchmarking and load-testing frameworks.
- Drive initiatives to prevent performance regressions across product surfaces.
- Collaborate with product, infrastructure, and SRE teams.
- Investigate system behavior, contribute to architecture, and enable teams to measure and improve performance.
- Integrate performance thinking into development through data, automation, and collaboration.
Benefits
- 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
- Health Savings Account
- Tuition reimbursement
- Ability to participate in the Employee Stock Purchase Program (ESPP)
- Mental wellness benefits through Spring Health
- Family-forming support provided by Carrot
- Paid parental leave
- Flexible, full-service childcare support with Kinside
- 401(k) with a generous employer match
- Flexible PTO
- Catered lunch each day in office and data center locations
- Discretionary bonus
- Equity awards
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
