[Hiring] Staff Software Engineer, Performance @Weights & Biases

Role Description

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.
• Drive initiatives to prevent regressions across product surfaces.
• Collaborate closely with product, infrastructure, and SRE teams.
• Blend investigation, architecture, and enablement—helping teams measure, understand, and continuously improve performance.

Qualifications

• 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.

Requirements

• 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.

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.