Sebastien Conejo
Berkeley, California, United States
Summary
🤩
Rockstar🎓
Top SchoolSebastien Conejo is a product-focused tech founder and CEO based in Berkeley with nine years of experience building developer-first backend tooling and digital products. As co-founder of Manifest he now leads an AI-friendly Backend-as-a-Service that turns a single YAML schema into a full backend, aiming to empower junior developers and streamline collaboration and versioning. His background spans founding CASE (an open-source JS framework) and running Buddyweb, where he combined product management, UX design, and hands-on engineering to deliver bespoke business applications. He repeatedly operates at the intersection of design, developer experience, and emerging AI tooling, and currently serves as Founder in Residence at HEC Paris. A detail often missed: he focuses as much on developer workflows and simplicity (single-file schemas) as on delivering business value, making complex stacks approachable for smaller teams.
9 years of coding experience
14 years of employment as a software developer
University of California, Berkeley
French, English, Spanish
Stackoverflow
21reputation
14kreached
1answer
0questions
Github Skills (117)
github10
codex10
ruby10
copilot10
cursor10
javascript10
openai-api10
ai-agent10
get-started10
backend-api10
flexbox10
webapp10
ai10
html10
cheat-engine10
Programming languages (12)
Github contributions (5)
mnfst/website
Oct 2023 - Jan 2026
Manifest website: https://manifest.build
Contributions:9 releases, 8 reviews, 22 PRs in 2 years 3 months
backend-for-cursormanifest
mnfst/.github
Apr 2023 - Feb 2026
Community health files for the Manifest organization
Contributions:9 pushes in 2 years 11 months
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