Sebastian Crossa
Co-Founder at ZeroEval
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolSebastian Crossa is a founder and software engineer with a decade of experience building product-first web and AI tooling from seed-stage startups to YC-backed ventures. He co-founded ZeroEval and LLM Stats where he focuses on self-improving agents and LLM observability, and previously served as the founding engineer at Micro HQ after scaling core products and payments at Launch House. Known for turning user friction into product wins, he cut loan pre-approval time from minutes to seconds at Atrato and implemented longstanding open-source features for the AWS Amplify CLI as an OSS fellow. A computer science student from Tecnológico de Monterrey and avid hackathon participant, he blends curiosity-driven experimentation with pragmatic engineering to ship impactful projects like Diversify and Vision. Based in New York, he seeks collaborators in the startup ecosystem and brings a pattern-driven approach to building systems that prioritize measurable social and user impact.
9 years of coding experience
4 years of employment as a software developer
Computer Science, Computer Science, Computer Science, Computer Science at Tecnológico de Monterrey
English, Spanish
Github Skills (125)
certification10
authentication10
auth10
lambda-functions10
javascript10
browser10
amplify10
api10
aws-amplify10
jwt10
cli10
stateless10
storage10
aws-lambda10
amplify-cli10
Programming languages (12)
Github contributions (5)
sebastiancrossa/kisana-fe
Mar 2019 - Apr 2019
Front end for Kisana app.
Contributions:67 commits, 44 PRs, 48 pushes in 1 month
front-endreact
MLH-Fellowship/0.2.1-donation-trigger
Jun 2020 - Jun 2020
Micro donations based on twitter event triggers.
Contributions:41 commits, 16 PRs, 15 pushes in 3 days
twitter-clienttriggerstwitter
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