Sagi Kedmi
Founder at kavanu
Tel-Aviv District, Israel
Summary
👤
Senior🎓
Top SchoolSagi Kedmi is a founder and seasoned software engineer with 11 years of experience building security-focused products, communities, and startups from Tel Aviv. He led vulnerability research and ML-driven malware detection at IBM, authored multiple CVEs and patents, and later founded ventures including OpenSay, Indie TLV and serverless security startup Noless. An active adviser and early investor, he mentors bootstrapped founders and sits on multiple advisory boards while cultivating Israeli indie-hacker networks. Sagi also contributes to notable open-source projects such as Certbot, where he improved Apache configs and implemented HSTS/Upgrade-Insecure-Requests hardening and tests—reflecting a practical blend of research-grade security and hands-on engineering. Notably, he began an MSc in computer science but channeled his academic rigor into industry impact and entrepreneurship.
11 years of coding experience
8 years of employment as a software developer
BSc, Computer Engineering, BSc, Computer Engineering at The Hebrew University of Jerusalem
English, Hebrew
Github Skills (7)
security10
apache10
python10
certbot10
letsencrypt10
http9
acme7
Programming languages (8)
Github contributions (5)
certbot/certbot
Nov 2015 - Mar 2017
Certbot is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server. It can also act as a client for any other CA that uses the ACME protocol.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:92 commits, 9 PRs, 55 comments in 1 year 4 months
Contributions summary:Sagi primarily contributed to the Apache configuration of the certbot project. Their work involved adding and generalizing HTTP header enhancements, specifically focusing on the implementation of the Strict-Transport-Security (HSTS) and Upgrade-Insecure-Requests (UIR) headers. Furthermore, they added corresponding tests and made adjustments for redirecting HTTP traffic to HTTPS. Their work ensured the enhanced security of the project by improving the configuration of the Apache web server.
actletsencryptpythonsslcertbot
rmrs/random-location
Aug 2017 - Jan 2023
Random coordinates within a circle, within an annulus or on a circumference - given a center point and radius.
Contributions:9 releases, 102 commits, 21 PRs in 5 years 5 months
centerradiuslodashpointlocation
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.