Shawn Lewis
Co-founder and Distinguished Engineer of Weights & Biases; first listed author of the W&B Weave package
- Distinguished Engineer and Cofounder, Weights & Biases1
Shawn Lewis is a co-founder of Weights & Biases and is listed on its leadership page as Distinguished Engineer and Cofounder. Lewis founded the company in 2017 with Lukas Biewald and Chris Van Pelt, and is the first author listed in the package metadata of Weave, the company's open-source toolkit repository.13
Career
Lewis co-founded Weights & Biases with Lukas Biewald and Chris Van Pelt in 2017. In a June 2019 post marking the product's public launch, Biewald described Lewis as a new co-founder and recounted six months of building the tool with Lewis, Van Pelt and early users.12
Weights & Biases began with an experiment tracking tool built to help develop models at OpenAI and was acquired by CoreWeave in May 2025. Its leadership page lists Lewis as Distinguished Engineer and Cofounder.1
Open-source work
Lewis is the first listed author in the pyproject metadata of the wandb/weave repository, the open-source Weave package maintained by Weights & Biases, with Tim Sweeney and other company engineers listed after.3
Work
W&B Weave (external site: github.com)Open-source code
First of the authors listed in the Weave package's pyproject metadata, alongside Tim Sweeney and other Weights & Biases engineers.3
Weights & Biases (external site: wandb.ai)Proprietary product
Co-founded the company in 2017 with Lukas Biewald and Chris Van Pelt; Biewald's 2019 launch post describes building the first version of the tool with Lewis, Van Pelt and early users including OpenAI, Toyota Research and Uber.12
Career timeline
Related people
More sourced profiles at the same organization, in the same field, or from the same school.
- Chris Van PeltAlso at Weights & Biases
- Andrew LaackDeveloper tools
- Lukas BiewaldAlso at Weights & Biases
- Hamel HusainEvaluation and benchmarks
- Harold BoothEvaluation and benchmarks
- Jeff HuberDeveloper tools
- John YangEvaluation and benchmarks
- Kilian LieretEvaluation and benchmarks
- Nate RushEvaluation and benchmarks
- Terry Yue ZhuoEvaluation and benchmarks
- 0xSeroDeveloper tools
- Abubakar AbidDeveloper tools
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