Grzegorz Kowszewicz
Founder at Stealth Mode
Palo Alto, California, United States
Summary
👤
Senior🎓
Top SchoolGrzegorz Kowszewicz is a founder and seasoned engineering leader with over a decade of hands-on experience building high-scale systems, from low-level infrastructure to full-stack web and mobile products. Based in Palo Alto, he has led engineering at Facebook, served as VP of Engineering at REX, and repeatedly founded startups delivering production-grade platforms—most recently a streaming fitness platform that supports thousands of concurrent streams. He blends deep systems and DevOps expertise (Kubernetes, GCP, AWS) with modern frontend stacks (React/Next.js, Tailwind) and applied ML for data-driven product features. Grzegorz is also a people-first coach who designs mentorship programs to accelerate individual growth and leverages human behavior insights in product and marketing decisions. He thrives on solving thorny technical and organizational bottlenecks by balancing intuition, metrics, and creative tooling. A practical polyglot engineer, he uniquely pairs data-center-scale automation experience with customer-facing product delivery.
11 years of coding experience
26 years of employment as a software developer
Bachelor IT, Bachelor IT at Warsaw University of Technology and BusinessArtificial intelligence, Artificial intelligence at Stanford University
English, Polish
Github Skills (75)
infrastructure10
infrastructure-management10
lookup-table10
artemis10
lgbt10
webcam9
overlay9
live-video8
audio8
service-worker8
overlays8
streaming7
vanilla-javascript7
api7
popover7
Programming languages (7)
Github contributions (5)
greko6/xfb2xfb
Apr 2020 - Jan 2023
by ex-Facebookers, for ex-Facebookers - a lookup table of similar tech & services
Contributions:3 reviews, 58 commits, 54 PRs in 2 years 9 months
similarartemislgbtinfrastructureinfrastructure-management
greko6/cryptoTickerGraph
Jan 2022 - Mar 2024
Contributions:9 pushes in 2 years 2 months
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