John Bucy
Software Engineer at Koukan (Cloud-Native Email stack)
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolJohn Bucy is a seasoned software engineer in San Francisco with 6 years of post-PhD-equivalent production experience building and modernizing large-scale systems, and over two decades of hands-on work in email, storage, and distributed systems. He led critical transitions at Google—re-architecting Gmail delivery for maintainability, improving mailbox p99 latency from 3s to 1s, and designing a faster VM-based sandbox for Cloud Run—while also inventing Bigtable-based reputation and delivery tooling early in Gmail’s history. At Koukan he’s translating that operational experience into a cloud-native, API-first email stack that bridges legacy store-and-forward semantics with Kubernetes-native deployments. He’s comfortable across low-level C++ systems, storage APIs, networking filters (Envoy), and higher-level HTTP/JSON integrations, and has a knack for pragmatic prototypes that unblock product and SRE teams. Notably, he repeatedly turns abandoned or fragile codepaths into observable, maintainable systems by combining dependency analysis, performance testing, and surgical refactors.
6 years of coding experience
18 years of employment as a software developer
Master of Science - MS, Computer Engineering, Master of Science - MS, Computer Engineering at Carnegie Mellon University
Github Skills (22)
kubernetes10
proxy10
accelerator10
golang10
high-performance10
cloud-native10
programming-language9
smtp-server9
python9
smtp9
lmtp9
smtpd9
mta9
reimplementation9
multiprocessing9
Programming languages (2)
Github contributions (5)
jsbucy/envoy
Feb 2020 - Aug 2023
Cloud-native high-performance edge/middle/service proxy
Contributions:2 PRs, 31 pushes, 2 branches in 3 years 6 months
golangproxyedgeload-balancingperformance
jsbucy/koukan
Sep 2024 - Apr 2025
Contributions:19 pushes, 1 branch, 2 comments in 6 months
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.