Where does William Zeng work?

William Zeng is Founder of Sweep.

What companies has William Zeng invested in?

Investments tracked here include Autumn, Dialect, GitCafe, Morph, Respan.

Where did William Zeng go to school?

William Zeng studied at Carnegie Mellon University (Bachelor's degree, Statistics/Machine Learning).

William Zeng

InvestorFounder

Founder at Sweep

San Francisco, California, United States

FoundedSweep · YC

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About

William Zeng previously worked as a machine learning engineer at Roblox, where he contributed to search ranking improvements. He studied statistics and machine learning at Carnegie Mellon University and is now building Sweep, an IDE extension for JetBrains.

Founder at Sweep YC S23

Intro paths

William went through Y Combinator (Summer 2023) — any YC alum in your network can reach them through the YC community.

Their group partner at YC was Diana Hu, General Partner at Y Combinator — the partner who ran Sweep's batch and knows the company first-hand. YC profile ↗

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In turn, William can intro founders to Sweep's investors below.

Sweep's investors · 9

Agrolimen Ventures Balderton CapitalLondon · $5M – $50M checks Bessemer Venture PartnersSan Francisco · $50K – $100M checks Clocktower VenturesSanta Monica · $100K – $20M checks Exceptional CapitalSan Francisco · $100K – $1M checks Goodwater CapitalBurlingame · $5M – $50M checks Insight PartnersNew York · $120M – $350M checks · since 2025 PioneerToronto, Ontario Y CombinatorSan Francisco · $500K checks · since 2023

Co-founders at Sweep

Kevin LuFounder

Experience

xAIMember of Technical Staffcurrent2026 — present
SweepCofounder/CEO2023 — 2026San Francisco, California, United States
RobloxSenior Machine Learning Engineer2023
RobloxSoftware Engineer II2022 — 2023
RobloxSoftware Engineer2021 — 2022
RobloxML Engineer Intern2020

Skills & more

Artificial Intelligence (AI)4Software Development4Large Language Models (LLM)Deep Learning2Natural Language Processing (NLP)Python4PyTorch1Generative AI Tools4

From William's professional profile.

Investments

Investor

Autumn Dialect GitCafe Morph Respan

Per curated public sources.

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Frequently asked questions

Who is William Zeng?: William Zeng previously worked as a machine learning engineer at Roblox, where he contributed to search ranking improvements. He studied statistics and machine learning at Carnegie Mellon University and is now building Sweep, an IDE extension for JetBrains.
Where does William Zeng work?: William Zeng is Founder of Sweep.
What companies did William Zeng found?: William Zeng founded Sweep.
What companies has William Zeng invested in?: Investments tracked here include Autumn, Dialect, GitCafe, Morph, Respan.
Where did William Zeng go to school?: William Zeng studied at Carnegie Mellon University (Bachelor's degree, Statistics/Machine Learning).