Sierra OBryan dot dev
android enthusiast • diversity advocate • she/her


Physicist turned Mobile Engineer living in Cincinnati, OH, trying to make the world a lil better through apps and advocacy.

I'm interested in making tech more accessible for more people. I love solving challenging problems, building beautiful and accessible Android apps with diverse and inclusive teams, and trying to lower the barrier of entry for aspiring developers.

I like exploring new libraries, features, and architectures, learning better ways to build Android projects, and sharing my knowledge with the community.


I'm an Google Developer Expert for Android.

I'm a co-author on this paper about stars✨.

I have an eclectic collection of accent chairs, glasses, and statement earrings.


👋 Clubhouse

Connecting the world through audio

🐤 Twitter
Empowering developers to build better user experiences faster with Jetpack Compose

🦷 Oral B
Live Brushing experience for Bluetooth paired handles

✈️ Sporty's Pilot Training
Offline quiz functionality + data syncing

💵 5/3 Mobile Banking
MultiCard support in the app and backend services

💸 ChasePay
OG Chase digital wallet with vendor integration

Sunsetted in 2020


I launched and direct the Cincinnati Chapter of Women Who Code. I was also a global Leadership Fellow for Women Who Code Mobile and plan lots of cool mobile events. I mentor some really great folks and I'm working on a MS in Computer Science at NKU.


A collection of DEI rescourses for better hiring in tech

Can I be a Developer? dot com

A collection of Android example apps used for mentoring, talks, and demos



That's great! You'll need to know a little Kotlin and Android. I recommend Google Code Labs, Udacity, and Ray Wenderlich to get started! But there are so many other great (free!) resources!


You can always find me hanging out in the Women Who Code Cincinnati Slack and the Women Who Code Mobile Slack. Join and say hi! Or you can follow me on Twitter. I occasionally make jokes about Android.



Android for Everyone: Accessibility in Android [CodeMash][Materials] • Android for Everyone: Accessibility in Android [Android Worldwide][Slides] • Android for Everyone: Accessibility in Android (Jeptpack Compose) [Presented at GitHub][Slides ] • Tech Olympics 2022 [Intro to Compose][Intro to Git and Github] • Women Who Code CFP Speaker Series [Coming up with an Idea] [Writing a Strong Proposal][AMA: Ask me anything about Public Speaking! Panel] • Android Study Jam - Compose • Fearless Females: International Women's Day Panel with Zip Australia • GDSC Android Study Jams Series [Intro to Kotlin][Build your first Android App][][] • Intro to Git and Github [INTERalliance] • Android for Everyone Accessibility in Android [droidcon Webinar] • The Importance and Benefits of Volunteering: WWCode Leaders [Women Who Code Podcast] • Intro to WorkManager [GDG Boston] • Getting Started with ML Kit [StirTrek] • droidCon NYC Program Committee • Ask me about the first ever Women Who Code Mobile Summit • Getting Started with ML Kit [GDG Cincinnati] • Intro to Jetpack Compose [Kansas City Developer Conference] • Unifying the UI: Embracing Declarative Frameworks for Mobile Development [Cincinnati WITcon] • Compose Camp - San Jose GDG [Session 1][Session 2] • Compose Camp [GDG NYC] • Compose Campe [John Brown University GDSC] • Featured Developer Journeys on the Google Developer Blog • Cincinnati Woman to Watch Finalist [The Circuit]


Intro to Git and GitHub [INTERalliance][Slides] • Fly Fast With Flutter: Building your first mobile app [Tech Olympics][Materials] • Getting Started with ML Kit (Lightning) [Women Who Code Boulder/Denver][Code][Slides] • Getting Started with ML Kit (Full) [IWD - WTM Lagos][Code][Slides] • Intro to Android [Underdog Devs] • Android for Everyone [Bank of America WIT&O Learning Series][Slides] • TechDecomposed WWDC21 Keynote Post show [Recording] • Android for Everyone: Getting Started with Jetpack Compose [co-presented with Alexx Mitchell][Materials][Recording][Featured] • Talking about Talking [co-presented with Mackenzie Bryant][Materials][Recording] • Android for Everyone: Accessibility [Chicago Roboto][Slides][Recording] • Strapi with Firbase Authentication, Jetpack Compose, and SwiftUI [Dev Community Summit][co-presented with Craig Clayton][Android app and Backend] • Seeding the Model: Getting Started with ML Kit [Momentum][Slides] • Seeding the Model: Getting Started with ML Kit [CONNECT Forward][Slides][Recording] • The Role of Public Speaking in Career Growth [CONNECT Forward][Recording] • Android Expert Panel [DevFest North America][Recording] • Android Study Jam: Jetpack Compose Basics [DevFest Northeast][Recording][Codelab] • Getting Started with Jetpack Compose [DevFest Ajah] • Featured in Forbes


Lessons in Tech Panel • Koin, Hilt, & Mockk: Introduction and Demo [Code][Code][Recording] • Women of Mobile Panel [Recording] • DataBinding in Android [Code][Recording] • Using Flutter to build a Geo-Spatial App [Code] • Cincinnati Tech Tea • Intro to JSON & Flutter [Code][Recording] • Beyond the Smartphone Panel • Navigation Components [Code] • Android DataStore [Code] • Accessibility in Android [Slides][Recording] • Intro to Git and GitHub [Slides] • Friends that Code Podcast • Women In Tech Panel

people say nice things about me on the internet sometimes.

Thank you!

Hosted on Github❤️