---
title: 'Senior Software Engineer, W&B Agent - W&B at Weights & Biases'
canonical: 'https://feeny.ai/job/senior-software-engineer-w-b-agent-w-b-weights-biases-livingston-v4c72gz7mgs2'
type: 'job'
last_seen: '2026-09-07'
---

# Senior Software Engineer, W&B Agent - W&B at Weights & Biases

- **Company:** Weights & Biases
- **Location:** Livingston, NJ / New York, NY / San Francisco, CA / Sunnyvale, CA / Bellevue, WA
- **Posted:** 2026-07-07
- **Last confirmed live:** 2026-09-07
- **Apply:** https://coreweave.com/careers/job?4695106006&board=weights_and_biases&gh_jid=4695106006

## Job description

CoreWeave, the AI Hyperscaler™, acquired Weights & Biases to create the most powerful end-to-end platform to develop, deploy, and iterate AI faster. Since 2017, CoreWeave has operated a growing footprint of data centers covering every region of the US and across Europe, and was ranked as one of the TIME100 most influential companies of 2024. By bringing together CoreWeave’s industry-leading cloud infrastructure with the best-in-class tools AI practitioners know and love from Weights & Biases, we’re setting a new standard for how AI is built, trained, and scaled.

The integration of our teams and technologies is accelerating our shared mission: to empower developers with the tools and infrastructure they need to push the boundaries of what AI can do. From experiment tracking and model optimization to high-performance training clusters, agent building, and inference at scale, we’re combining forces to serve the full AI lifecycle — all in one seamless platform.

Weights & Biases has long been trusted by over 1,500 organizations — including AstraZeneca, Canva, Cohere, OpenAI, Meta, Snowflake, Square,Toyota, and Wayve — to build better models, AI agents and applications. Now, as part of CoreWeave, that impact is amplified across a broader ecosystem of AI innovators, researchers, and enterprises.

As we unite under one vision, we’re looking for bold thinkers and agile builders who are excited to shape the future of AI alongside us. If you're passionate about solving complex problems at the intersection of software, hardware, and AI, there's never been a more exciting time to join our team.

What You’ll Do:

ARIA is the AI Research and Iterations Agent that enables continuous experimentation at scale. The engineering team is responsible for building this research agent from scratch by leveraging  distributed backend systems that execute multi-turn agent conversations, to the React UI that thousands of ML practitioners interact with every day. Our mission is to ship a fast, reliable, and delightful agent experience that genuinely accelerates ML workflows, and every engineer on the team owns that outcome end to end.

About the role:

As a Senior Full Stack Engineer on the ARIA Agent team, you'll own features and systems across the entire stack — from backend infrastructure and API design to the React frontend that powers the chat interface, billing UI, and agent configuration experience. You'll build and maintain the distributed worker systems that run agent conversations at scale, design the streaming architecture that delivers real-time token output to the browser, and contribute to the frontend components that make ARIA feel fast and intuitive. You'll collaborate closely with ML science, product, iOS, and SRE teams — blending reliability engineering with product sensibility. Day to day, you'll move fluidly between debugging a production memory leak in a Kubernetes worker, shipping a new billing UI component, and hardening the egress controls on the code execution sandbox.

Who You Are:

- 4+ years of full stack engineering experience, with meaningful depth in both backend services and React/TypeScript frontend development.
- Strong Python backend skills — async patterns, FastAPI, distributed state machines, Kubernetes pod lifecycle.
- Proficient in TypeScript and React; comfortable building and maintaining production UI components including real-time streaming interfaces, complex state management, and responsive layouts across web and mobile web.
- Experience building and operating services at scale — rolling deploys, autoscaling, worker concurrency, graceful termination.
- Experience with observability tooling (Datadog, Weave tracing, structured logging) and a track record of building dashboards that surface actionable signals.
- Security-conscious engineering mindset — input validation, sandboxed code execution, egress controls, and payload hardening.
- Experience with MySQL or similar RDBMS for transactional state management.

Preferred:

- Experience building streaming UIs (server-sent events, WebSockets) with graceful fallback handling.
- Background in ML infrastructure, developer tooling, or observability platforms.
- Hands-on experience building and shipping production-grade AI agents — including tool use, multi-turn conversation management, and agentic reliability patterns.
- Comfortable thriving in a fast-paced startup environment — able to move quickly, make pragmatic tradeoffs, and iterate on real user feedback without sacrificing production quality.

Wondering if you’re a good fit? We believe in investing in our people, and value candidates who can bring their own diversified experiences to our teams – even if you aren't a 100% skill or experience match. Here are a few qualities we’ve found compatible with our team. If some of this describes you, we’d love to talk.

- 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.
- You’re an expert in transforming deep technical insights into tools and processes that empower other engineers to build faster, more reliable systems.
- You find satisfaction in long-term, cross-team collaboration — helping others succeed by embedding performance thinking into their workflows.
- You get energy from bridging theory and practice: designing scalable architectures and writing the code that proves them out.
- You care deeply about measurement, iteration, and continuous improvement — not just fixing bottlenecks, but preventing them from ever recurring.

Why Us?

We work hard, have fun, and move fast! We’re in an exciting stage of hyper-growth that you will not want to miss out on. We’re not afraid of a little chaos, and we’re constantly learning. Our team cares deeply about how we build our product and how we work together, which is represented through our core values:

- Be Curious at Your Core
- Act Like an Owner
- Empower Employees
- Deliver Best-in-Class Client Experiences
- Achieve More Together

We support and encourage an entrepreneurial outlook and independent thinking. We foster an environment that encourages collaboration and provides the opportunity to develop innovative solutions to complex problems. As we get set for takeoff, the growth opportunities within the organization are constantly expanding. You will be surrounded by some of the best talent in the industry, who will want to learn from you, too. Come join us!

The base salary range for this role is $182,000 to $242,000. The starting salary will be determined based on job-related knowledge, skills, experience, and market location. We strive for both market alignment and internal equity when determining compensation. In addition to base salary, our total rewards package includes a discretionary bonus, equity awards, and a comprehensive benefits program (all based on eligibility).

## What We Offer

The range we’ve posted represents the typical compensation range for this role. To determine actual compensation, we review the market rate for each candidate which can include a variety of factors. These include qualifications, experience, interview performance, and location.

In addition to a competitive salary, we offer a variety of benefits to support your needs. The benefits below reflect our US-based offerings; for roles in other locations, benefits vary and are shared during the hiring process. These include:

- 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

California Applicants

[California Consumer Privacy Act](https://drive.google.com/file/d/1gPBRBhUNAMBmj7Yn4_M-hCugm7ZJD4hr/view?usp=sharing)

## Equal Opportunity & Accommodations

CoreWeave is an equal opportunity employer, committed to fostering an inclusive and supportive workplace. All qualified applicants and candidates will receive consideration for employment without regard to race, color, religion, sex, disability, age, sexual orientation, gender identity, national origin, veteran status, or genetic information.

As part of this commitment and consistent with the https://www.eeoc.gov/laws/guidance/fact-sheet-disability-discrimination, CoreWeave will ensure that qualified applicants and candidates with disabilities are provided reasonable accommodations for the hiring process, unless such accommodation would cause an undue hardship. If reasonable accommodation is needed, please contact: careers@coreweave.com.

Export Control Compliance

This position requires access to export controlled information.  To conform to U.S. Government export regulations applicable to that information, applicant must either be (A) a U.S. person, defined as a (i) U.S. citizen or national, (ii) U.S. lawful permanent resident (green card holder), (iii) refugee under 8 U.S.C. § 1157, or (iv) asylee under 8 U.S.C. § 1158, (B) eligible to access the export controlled information without a required export authorization, or (C) eligible and reasonably likely to obtain the required export authorization from the applicable U.S. government agency.  CoreWeave may, for legitimate business reasons, decline to pursue any export licensing process.

## About Weights & Biases

## Company Overview
- **One-liner**: Weights & Biases provides an AI developer platform for building, tracking, and managing machine learning models and generative AI applications.
- **Entity Type**: Private (acquired by CoreWeave in May 2025)
- **Headquarters**: San Francisco, California, United States
- **Founded**: 2017
- **Founders**: Lukas Biewald, Chris Van Pelt, Shawn Lewis

## Core Business
- **Primary industry/industries**: AI/ML Developer Tools, MLOps, Software Development
- **Target customers**: AI researchers, ML engineers, and AI app builders at enterprises and startups (B2B, B2C for individual developers)
- **Mission or purpose statement**: “To build the best tools for AI developers.”

## Products & Services
- **[Core]**: Experiment tracking, model registry, hyperparameter optimization, and collaboration tools for machine learning workflows. SaaS platform.
- **[Weave]**: A tool to iterate, evaluate, and monitor AI agents and LLM applications. SaaS platform.
- **[Models]**: A platform for building and managing AI models, including deployment and monitoring.
- **[Mobile App]**: The first iOS app to monitor AI experiments and track training runs anytime, anywhere.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (acquired by CoreWeave in May 2025 for an undisclosed amount; prior Series C funding of over $150 million).
- **Key Metric**: Total funding of over $150 million (Series C).
- **Notable Investors/Partners**: Coatue, Felicis Ventures, BOND, Insight Partners, Bloomberg Beta, NVIDIA, and others.
- **Growth Signals**: Acquired by CoreWeave in May 2025; tools used by leading AI teams including OpenAI, NVIDIA, Meta, and Cohere; headcount of approximately 260-270 employees; remote-first global team; certified under ISO/IEC 27001:2022, SOC 2, HIPAA, and GDPR.

## Competitive Advantages
- **First-mover and deep integration**: Early entrant in MLOps, with deep integrations into major ML frameworks and cloud platforms.
- **Customer base**: Serves the most prominent AI labs and enterprises (OpenAI, NVIDIA, Meta, Cohere), providing strong network effects and brand credibility.
- **Comprehensive platform**: Covers the full ML lifecycle from experiment tracking to model monitoring and agent evaluation.
- **Enterprise compliance**: SOC 2, HIPAA, ISO 27001, and GDPR compliant, making it suitable for regulated industries.
- **Acquisition by CoreWeave**: Provides access to massive compute infrastructure and financial stability.

## Strategic Focus
- **Post-acquisition growth**: As a proud part of CoreWeave, the company is focused on scaling its platform and integrating with CoreWeave’s cloud infrastructure.
- **Generative AI**: Emphasis on building tools for the era of generative AI, including agent evaluation and monitoring (Weave).
- **Enterprise expansion**: Continued investment in enterprise features, compliance, and dedicated deployment options.
- **Developer experience**: Maintaining a strong focus on the developer community and individual practitioners.

## Why Work Here
- **Remote-first culture**: The company is headquartered in San Francisco but has always been remote-first, with team members distributed globally. Offices also in Berlin, Tokyo, and London.
- **Values-driven environment**: Core values include grit, curiosity, gumption, and honesty. The company emphasizes ownership, continuous learning, and collaborative problem-solving.
- **Benefits**: Medical, dental, vision, 401(k), WFH stipend, flexible time off, professional development stipend, parental leave, and life/AD&D insurance.
- **Engineering culture**: Described as nimble and collaborative, with a focus on building the best tools for AI. The team includes distinguished engineers and co-founders who are deeply technical.
- **Growth trajectory**: Joining during the post-acquisition phase with CoreWeave offers potential for accelerated growth and impact.
- **Hiring process**: Initial conversations, team/panel interviews, executive call(s), and an offer. The process is designed to be thorough but efficient.

## Sources
1. [wandb.ai - About Us](https://wandb.ai/site/company/about-us/)
2. [wandb.ai - Careers](https://wandb.ai/site/careers/)
3. [wandb.ai - Platform](https://wandb.ai/site/)
4. [wandb.ai - Blocks (Leadership & Investors)](https://wandb.ai/site/blocks/)
5. [LinkedIn - Weights & Biases](https://www.linkedin.com/company/wandb)

## Other roles at Weights & Biases

- [Technical Support Engineer II - W&B](https://feeny.ai/job/technical-support-engineer-ii-w-b-weights-biases-livingston-tx3ej2ss9wr8) — Livingston, NJ / New York, NY
- [Engineering Manager, Artifacts & Registry - W&B](https://feeny.ai/job/engineering-manager-artifacts-registry-w-b-weights-biases-livingston-s3n0scvzgr3n) — Livingston, NJ / New York, NY / Sunnyvale, CA / Bellevue, WA
- [Engineering Manager, Weave - W&B](https://feeny.ai/job/engineering-manager-weave-w-b-weights-biases-san-francisco-jah164z0a52p) — San Francisco, CA
- [Senior Software Engineer, Production Engineering (Cloud & On-Prem) - W&B](https://feeny.ai/job/senior-software-engineer-production-engineering-cloud-on-prem-w-b-weights-mv06ezyv4xcb) — Livingston, NJ / New York, NY / Sunnyvale, CA / Bellevue, WA / San Francisco, CA
- [Senior Software Engineer, Weave - Weights & Biases](https://feeny.ai/job/senior-software-engineer-weave-weights-biases-weights-biases-livingston-7s3b15d8hs48) — Livingston, NJ / New York, NY / Sunnyvale, CA / Bellevue, WA / San Francisco, CA
- [Senior Software Engineer, Infrastructure Operations - Weights & Biases](https://feeny.ai/job/senior-software-engineer-infrastructure-operations-weights-biases-weights-7qaj2v5z587y) — Livingston, NJ / New York, NY / San Fransisco, CA / Sunnyvale, CA / Bellevue, WA
- [Senior Software Engineer, ML Model Training UI - Weights & Biases](https://feeny.ai/job/senior-software-engineer-ml-model-training-ui-weights-biases-weights-biases-j2xwjwsd0fx7) — /livingston, NJ / New York, NY / San Francisco, CA / Sunnyvale, CA / Bellevue, WA
- [Staff Product Manager, Training Infrastructure - Weights & Biases](https://feeny.ai/job/staff-product-manager-training-infrastructure-weights-biases-weights-biases-g5mszmj705wy) — Livingston, NJ / New York, NY / San Francisco, CA / Sunnyvale, CA / Bellevue, WA
- [Senior Data Platform Engineer - Weights & Biases](https://feeny.ai/job/senior-data-platform-engineer-weights-biases-weights-biases-livingston-2phfge6651r8) — Livingston, NJ / New York, NY / San Francisco, CA / Sunnyvale, CA / Bellevue, WA / -, United States
- [Staff Software Engineer, Performance- Weights & Biases](https://feeny.ai/job/staff-software-engineer-performance-weights-biases-weights-biases-san-francisco-1nhd1dmndxkm) — San Francisco, CA / Sunnyvale, CA / Bellevue, WA / -, United States