Hello, I'm
Petr Guan
C++ Engineer @ Microsoft Outlook
{msYears} years at Microsoft building Outlook Mobile. Passionate about high-performance native apps, clean architecture, and crafting tools that people use every day.
Hello, I'm
C++ Engineer @ Microsoft Outlook
{msYears} years at Microsoft building Outlook Mobile. Passionate about high-performance native apps, clean architecture, and crafting tools that people use every day.
I'm a C++ engineer at Microsoft with {msYears} years of experience building Outlook Mobile — the email client used by hundreds of millions every day. I specialize in high-performance native development and scalable architecture.
Outside of work, I build indie apps — most recently Bebilog, a privacy-first baby tracker for iOS. I'm also passionate about compilers, design patterns, and exploring the fundamentals of computer science.
Microsoft — Outlook Mobile
Building and maintaining Outlook Mobile, the email client used by millions of users worldwide. Focused on high-performance C++ development, cross-platform architecture, and delivering reliable, polished experiences on iOS and Android.
Silicon Studio
Worked on big data pipelines and analytics infrastructure. Gained hands-on experience with data processing, text retrieval, and search engine technologies.
Nanjing University
Built a strong foundation in computer science fundamentals, algorithms, and systems programming.
Common infrastructural code for Swift Package Manager and llbuild. Core utilities powering the Swift build ecosystem.
microsoftApp Center SDK for iOS, macOS, and tvOS. Provides analytics, crash reporting, and beta distribution for Apple platforms.
microsoft1DS C/C++ SDK — cross-platform telemetry collection framework used across Microsoft products on Android, iOS, Linux, macOS, and Windows.
Microsoft's flagship email client for iOS and Android, used by hundreds of millions daily. I work on the core C++ engine powering cross-platform email, calendar, and search experiences.
A privacy-first baby tracking app for iOS & watchOS. Track feeding, sleep, diapers, growth, vaccines, and more — all data stored locally, no cloud, no ads.
An AI-native Markdown content runtime for macOS. Not a text editor — a content flow router that intercepts, renders, and manages Markdown from any source (files, clipboard, drag-drop, system tray).
A WeChat Mini Program for fresh pet food e-commerce. Includes customer storefront (browse, order, pay) and merchant dashboard (product management, order processing, shipping). Supports SF Express delivery and in-store pickup — no third-party delivery platforms needed.
I'm always open to discussing new opportunities, interesting projects, or just having a chat about technology.