Portrait of Tim Sweeney

Tim
Sweeney

Teaching computers to help people.

Principal Software Engineer at Weights & Biases, now part of CoreWeave. I build CoreWeave ARIA, a research agent for ML teams. Before that I led Weave, our open-source toolkit for tracing and evaluating AI applications, and earlier ran ML platform products at Twitter and search at Workday.

Work

Selected

Now · CoreWeave · Weights & Biases

CoreWeave ARIA

An AI research agent embedded in W&B. Ask questions of your experiments, runs, artifacts and charts in plain language. The goal is an always-on collaborator that proposes hypotheses, launches experiments on cloud GPUs, and iterates on your behalf.

Previously · Lead maintainer · Open source

Weave

Observability and evaluation for production agents. Trace, evaluate and improve AI applications, with sessions, turns and tool calls treated as first-class concepts.

1,000+GitHub stars
790+Dependents
100+Contributors

Career trace

2011 — now
CoreWeave / Weights & BiasesPrincipal Software Engineer
2020 —
Georgia TechM.S. Computer Science, Machine Learning
2018 — 20
TwitterProduct Manager, ML Platform
2018
WorkdayProduct Manager, Search & ML
2015 — 18
Cal PolyB.S. Business Administration, minor in Computer Science
2011 — 15

Writing

Selected

Set in Newsreader and Hanken Grotesk.