Leonardo Setyanto
Co-Founder & CTO at Matrices
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolLeonardo Setyanto is a seasoned software engineer and technical founder with a decade of experience building web applications and leading engineering teams from early startups to scale. As Co-Founder & CTO at Matrices and former Technical Lead at Weights & Biases, he blends hands-on full‑stack development with product-minded leadership in the San Francisco tech ecosystem. He has a track record of shipping end-to-end systems—payment flows, chat and reputation systems, and data-rich dashboards—dating back to his YC-backed CrowdMed CTO role. His open-source contributions to the popular Weights & Biases codebase demonstrate comfort across API design, Jupyter integrations, and offline/SDK workflows. Comfortable with rapid iteration across diverse stacks (React, Node, Python, ElasticSearch, PostGIS), he pairs pragmatic engineering with user feedback loops to drive product improvements. Beyond code, he writes problems to solve code—favoring practical tooling and experiments that move projects from prototype to production.
10 years of coding experience
12 years of employment as a software developer
Turing/Dean's Scholars Honors Computer Science, Turing/Dean's Scholars Honors Computer Science at The University of Texas at Austin
English, Indonesian
Github Skills (11)
machine-learning10
api10
python10
apidoc10
jupyter10
back-end-development9
mlops8
front-end-development8
tensorflow7
data-science7
pytorch7
Programming languages (5)
Github contributions (5)
wandb/wandb
Jan 2020 - Jan 2023
The AI developer platform. Use Weights & Biases to train and fine-tune models, and manage models from experimentation to production.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:12 reviews, 10 commits, 14 PRs in 3 years
Contributions summary:Leonardo contributed to various aspects of the Weights & Biases platform, including enhancements to the public API, improvements to the Jupyter integration, and fixing issues related to offline mode and reports. They made changes to both the backend (`wandb/apis/public.py`) and frontend/client-side integrations (`wandb/jupyter.py`, `tests/test_cli.py`, and SDK-related files). This work demonstrates a broad understanding of the project's codebase, touching on API functionality, user interface elements, and core application logic.
pythoncollaborationtensorflowhyperparameter-tuningcli
laxels/hextris
Dec 2021 - Jan 2022
Fast paced HTML5 puzzle game inspired by Tetris!
Contributions:71 pushes, 1 branch in 1 month
puzzlejavascripthtml5game
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