# Brian Wang

> Staff iOS Engineer. 7+ years at Block (Square) turning fragile systems into reliable ones - at scale, across teams, without downtime.

Brian Wang is a Staff iOS Engineer based in San Francisco. He specializes in platform infrastructure, database architecture, and high-stakes migrations - the kind of work that makes other engineers' jobs easier and users never notice.

## Highlights

- Rearchitected Square's iOS printing infrastructure from the ground up - replaced a fragile in-memory queue with a persistent, database-backed system handling tens of millions of print jobs weekly; raised the share of restaurants with zero kitchen-ticket print failures from 84% to 91% and cut printing-related support tickets in half
- Pioneered org-wide adoption of GRDB (SQLite) as a modern Core Data replacement; created a shared foundation module, authored the developer guide, established concurrency-safe patterns across 3 teams
- Led 5 major platform migrations transforming a legacy acquired application into a full-fledged POS vertical - including a checkout redesign that improved first-time payments conversion by 24%
- Drove appointment sync reliability from 86% to 99% by designing serial sync enforcement that eliminated race conditions causing appointment data loss
- Championed AI-assisted development; built an on-call debugging dashboard, presented best practices to 100+ engineers at an org-wide summit

## Skills

Swift, Objective-C, SwiftUI, UIKit, Combine, Swift Concurrency, GRDB, SQLite, Core Data, MVVM, XCTest, Xcode, Datadog, CI/CD

## Education

BS Computer Science, Georgia Institute of Technology (2014–2018) - GPA 3.9, Concentration: Systems Architecture & Networking

## Links

- [Resume (PDF)](https://brianwang.xyz/assets/BrianWangResume.pdf): Full resume download
- [LinkedIn](https://www.linkedin.com/in/brianwang9100): Professional profile
- [Portfolio](https://brianwang.xyz): Interactive portfolio