Staff Software Engineer, Performance- Weights & Biases
About The Position
CoreWeave’s Weights & Biases Performance Engineering team helps ensure its systems and products scale seamlessly as usage grows. The team embeds performance thinking throughout development by diagnosing issues, designing scalable patterns, and building tools that help engineering teams deliver fast, efficient, reliable experiences. As a Staff Engineer on the Performance Engineering team, you will take technical ownership of complex performance challenges across the W&B platform and infrastructure. You will design and lead experiments to improve scalability and latency, develop standardized benchmarking and load-testing frameworks, and drive initiatives to prevent regressions across product surfaces. You will work closely with product, infrastructure, and SRE teams, combining technical expertise with a holistic understanding of system behavior. The role blends investigation, architecture, and enablement, helping teams measure, understand, and continuously improve performance.
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.
- Strong systems-level debugging and profiling skills.
- Deep understanding of distributed systems concepts, including caching, queuing, concurrency, and resource contention, and their performance implications.
- Experience designing and implementing load-testing, benchmarking, or performance-regression frameworks, such as Locust, Gatling, k6, or custom solutions.
- Familiarity with metrics and tracing systems such as Prometheus, Grafana, OpenTelemetry, or Datadog, 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 on performance initiatives.
- Help teams measure, understand, and continuously improve performance.
- Integrate performance thinking into engineering workflows through tools, processes, data, automation, and collaboration.
Benefits
- Discretionary bonus and equity awards, subject to eligibility.
- Medical, dental, and vision insurance, 100% paid for by CoreWeave for US-based full-time employees.
- 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 at office and data center locations.
- Casual work environment.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
