# Ray Chun

> Software Engineer at Meta

Location: Brooklyn, New York, United States
Profile: https://flows.cv/raychun

## Work Experience
### Senior Software Engineer @ Meta
Jan 2024 – Present | New York, New York, United States
- Build and operate highly distributed messaging infrastructure supporting 3B+ users across Instagram and Facebook/Messenger.
- Delivered $5M+ in annualized infrastructure savings through cross-stack efficiency and storage/capacity optimizations.
- Led large-scale deprecation of cross-app interoperability chats across Instagram and Facebook, coordinating 20+ engineers and driving safe global rollout.
- Designed and shipped a traffic/queue-placement optimization system (“Continuous Rebalancer”), delivering $1.14M/year OpEx savings and ~70ms p90 latency improvements for messaging server-to-server traffic (with additional end-to-end latency wins).
- Contributed core backend infrastructure work to multi-year modernization efforts migrating IG messaging onto a newer stack, including Django offloading and reliability improvements.
- Drove reliability and engineering excellence initiatives (incident review, design review, product-engineering office hours, Better Engineering), reducing operational burden and unblocking product teams.
- Top-tier production operator: consistently ~95th percentile incident/SEV contribution; recognized as a top collaborator with #2 in peer “#thanks” volume across a 250+ engineer org.
- Mentored and onboarded multiple engineers; managed an intern to successful delivery/return offer and supported 5 additional interns through reviews, debugging, and architecture guidance.
- Built community beyond day-to-day work: organized 12 NYC soup kitchen volunteer events engaging 50+ coworkers.

### Software Engineer II @ Meta
Jan 2022 – Jan 2024 | New York, New York, United States

### Software Engineer II @ Uber
Jan 2021 – Jan 2022 | New York, New York, United States
Developed features in a business critical application used by over 600K restaurants to process millions of orders a day. Implemented new features in an external API used by hundreds of partner integrations.
Rewrote 45+ endpoints used by the Orders app from a legacy Node.js architecture to Golang, resulting in an average of 50% reduction in p99 latency, decrease in error rates, and dozens of cores saved.
Presented in weekly knowledge shares, created a script for auto-generation of alerts in our web applications and worked on documentation that helped new engineers onboard.
Decommissioned and rewrote a legacy user facing React 15 application in modern stack, clearing long-standing technical debt and a big pain point for engineers across 7 product teams.

### Software Engineer @ Uber
Jan 2019 – Jan 2021 | New York, New York, United States
Redesigned user accounts for restaurants, decreasing onboarding complexity and support costs.
Launched a new mobile application for restaurants providing real-time notifications for status updates, increasing average restaurant online rate by 5%. Used by 20K+ users daily.

### Software Engineer Intern @ Uber
Jan 2018 – Jan 2018 | New York, New York, United States
Launched a new version of a menu building web application for restaurants.
Made various contributions to other web applications in the restaurant space including a critical internal tool for managing restaurant operations that was used by thousands of employees daily.

### Software Engineer Intern @ Uber
Jan 2018 – Jan 2018 | San Francisco, California, United States
Built a photoshoot scheduling feature in the self-onboarding application, including an integration with third party API. Managed weekly meetings with external stakeholders for a smooth integration.
Increased test coverage from 60% to 90% in onboarding app and fixed numerous production bugs

### Data Engineer Intern @ Hubdoc
Jan 2017 – Jan 2017 | Toronto, Ontario, Canada
Worked on ETL scripts to transform millions of data points. Analyzed and optimized PostgreSQL queries and schema. Built features for a business metric reporting web application in Backbone.js and Node.js.

### Software Engineer Intern @ Primal.ai
Jan 2016 – Jan 2016 | Kitchener, Ontario, Canada
Deployed chat bot using Microsoft Bot Framework and implemented a RESTful API in Scala.

### Software Engineer Intern @ SAP
Jan 2016 – Jan 2016 | Waterloo, Ontario, Canada
Created visualizations using jQuery and D3 as well as designed a schema with SQLAnywhere.

### Software Engineer Intern @ Kabuk Law
Jan 2015 – Jan 2015 | Toronto, Ontario, Canada
Built end-to-end features in appointment scheduling application in AngularJS, C#, and Microsoft SQL Server. Improved SEO for lawyer catalogue web application.


## Education
### Bachelor's degree in Computer Science
University of Waterloo
Jan 2014 – Jan 2019

### High School Diploma
FHCI
Jan 2010 – Jan 2014


## Contact & Social
- LinkedIn: https://linkedin.com/in/raychun

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Source: https://flows.cv/raychun
JSON Resume: https://flows.cv/raychun/resume.json
Last updated: 2026-03-23