Staff Software Engineer, Performance- Weights & Biases

Role description

Role Overview

As a Staff Engineer on the Performance Engineering team, you'll take technical ownership of complex performance challenges across the W&B platform and infrastructure. You'll design and lead experiments to improve system scalability and latency, develop standardized benchmarking and load testing frameworks, and drive initiatives to prevent regressions across product surfaces.

What You Will Do

Day to day, you'll blend investigation, architecture, and enablement—helping teams measure, understand, and continuously improve performance.

Why It Might Be a Fit

You love to turn messy, complex performance problems into clear, data-backed stories that lead to concrete action. You're curious about how systems behave under real-world load and enjoy building experiments that reveal what's really happening under the hood.

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.

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