Justin Sermeno
Senior Software Engineer at Amazon
Seattle, Washington, United States
Summary
👤
Senior🎓
Top SchoolJustin Sermeno is a senior software engineer based in Seattle with 15 years building globally distributed, highly available, low-latency server-side systems and fault-tolerant data infrastructure. At Amazon he leads architecture and delivery across multiple teams, driving microservice designs, experiment velocity for director- and SVP-level orgs, and mentoring engineers on operational best practices. His background spans startups and scale-ups—designing exactly-once stream processing and throughput-optimized pipelines at Diffos and operating high-volume ETL and API platforms at Game Closure. Justin prioritizes well-tested, well-documented code and pragmatic delivery, balancing maintainable abstractions with business needs. He has hands-on experience across languages and stacks (from Clojure and Java to Ruby and Python) and a knack for reducing operational surface area while increasing system throughput.
14 years of coding experience
6 years of employment as a software developer
BS with Distinction in the Major, Computer Science 2010, BS with Distinction in the Major, Computer Science 2010 at UC Santa Barbara
Github Skills (119)
threejs10
svg10
webgpu10
3d10
javascript10
webgl10
virtual-reality10
augmented-reality10
canvas10
webxr10
api9
querying9
haskell8
lua8
vim8
Programming languages (9)
Github contributions (5)
jsermeno/amby
Oct 2016 - Nov 2016
Contributions:81 commits, 60 pushes, 1 branch in 1 month
jsermeno/vimrc
Sep 2015 - Aug 2017
Contributions:17 pushes in 1 year 10 months
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