Staff Software Engineer, Performance- Weights & Biases
About The Position
Weights & Biases has been acquired by CoreWeave, the AI Hyperscaler™, to create a comprehensive platform for AI development and deployment. This role is part of the Performance Engineering team, which ensures systems and products scale effectively with growing usage. The team embeds performance thinking throughout the development lifecycle, focusing on diagnosing issues, designing scalable patterns, and building tools to enable all engineering teams to deliver fast, efficient, and reliable experiences. Their mission is to make performance a shared responsibility across the company through data, automation, and collaboration.
Requirements
- 8+ years of experience as a software engineer, with 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 (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, k6, custom solutions).
- 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.
Nice To Haves
- 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.
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 regressions across product surfaces.
- Collaborate closely with product, infrastructure, and SRE teams.
- Blend investigation, architecture, and enablement to help teams measure, understand, and continuously improve performance.
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 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 our office and data center locations
- A casual work environment
- A work culture focused on innovative disruption
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
