# Cosmo Q.

> Engineering @Airbnb | Guest Lecturer, Applied AI - University of Hawaiʻi | Blogger | Open Source

Location: San Francisco, California, United States
Profile: https://flows.cv/cosmo

Over the past few years at Airbnb, I’ve been driving large-scale change, from architecting supply-side products, leading major launches, to rebuilding core infrastructure for greater resilience and scale. Outside jobs, I lead open-source projects (Lepton, which has been highlighted by Ubuntu, with 10k+ stars) and occasionally review upcoming books. 

Guest Lecturer at the University of Hawaiʻi at Mānoa for the Applied AI graduate course(ICS 605).

I'm happy with my current work but open for TL roles if there are complex challenges with scaling product platforms. I am a hands-on person who enjoys coding, breaking and fixing hardware, and mentoring.

■ GitHub: https://github.com/hackjutsu
■ Medium: https://medium.com/@cosmo.lepton
■ Stack Overflow: https://stackoverflow.com/users/3697757/hackjutsu

## Work Experience
### Staff Engineer, TL @ Airbnb
Jan 2018 – Present | San Francisco Bay Area
Tech blog of recent work: https://medium.com/@cosmo.lepton

At Airbnb, I led several important initiatives that had an impact on the company's technology and growth. It includes rebuilding the dynamic config system, serving over 90% of Airbnb services, and orchestrating the creation of a read-optimized store system for millions of global listings(public data) with significantly enhanced performance and reduced costs. As a tech lead, I drove supply-side growth products($$$) and led hero projects in company-wide launch. I also played vital roles in improving media and address systems, guiding the SOA migration of critical product flows, and contributing to Airbnb's tech brand team which manages open-source projects and tech blogs from 2018-2020. 

Part of IPO in Dec 2020.

### Guest Lecturer — ICS 605: Applied AI Class @ University of Hawaii at Manoa
Jan 2026 – Jan 2026 | Hawaii, United States
Guest lecturer for the Applied AI graduate class(ICS 605) at the University of Hawaiʻi at Mānoa.

Professional Master's in Computer Science(MCS): Artificial Intelligence and Data Science Track

### Venture Fellow @ SAV (Scale Asia Ventures)
Jan 2023 – Jan 2024

### AngelList Syndicate Member @ AirAngels
Jan 2022 – Jan 2023

### Founder of Lepton (GitHub, 10k+ stars) @ Personal Open Source Projects
Jan 2017 – Jan 2021
Leading the open-source project Lepton, a popular snippet manager powered by GitHub Gist. 

https://hackjutsu.com/Lepton/

- No.1 snippet manager app in several rankings
- More than 10k stars on GitHub
- More than 30 contributors around the world
- Promoted by @Ubuntu (https://twitter.com/ubuntu/status/1034877112229015553)
- Users from more than 130 countries
- Media coverage in more than six languages

### Sr. Software Engineer @ LogMeIn
Jan 2017 – Jan 2018 | California, United States
LogMeIn **acquired** Citrix's Mobility department

Cloud Real-time Communication Platform
Mobile Infra (Android/iOS/Web/Electron)

### Software Engineer - Sr. Software Engineer @ Citrix
Jan 2014 – Jan 2017 | California, United States
Cloud Real-time communication Platform
Mobile Infra (Android/iOS/Web/Electron)

### Engineer @ Ambarella Inc
Jan 2013 – Jan 2013


## Education
### Master's degree in Electrical and Computer Engineering
UCLA

### Bachelor's degree
HUST


## Contact & Social
- LinkedIn: https://linkedin.com/in/cosmo-qiu
- GitHub: https://github.com/hackjutsu
- Website: https://medium.com/@cosmo.lepton

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Source: https://flows.cv/cosmo
JSON Resume: https://flows.cv/cosmo/resume.json
Last updated: 2026-03-22