Jumbo Privacy was an app that helped users take back control of their online privacy and security. The app was subscription-based and generated $2.5M ARR with up to 100k weekly active users at its peak. Jumbo was acquired by Coalition in July 2023.

As an Android engineer I built, shipped and maintained several features using the technologies and frameworks listed below in the tech section. Some highlights of the work that I've personally done as an Android developer:

Implement entire features (2FA, Family Sharing, Twitter scan) in Kotlin using coroutines, dependency injection (Dagger2), Compose (and other Jetpack libraries), all within our existing MVI architecture

Do weekly code reviews

Ship new features to production on a weekly basis

Be mentored by the two other well experienced (10+ years) Android engineers

The app's features included:

Clean up your social media content: auto-delete Tweets, Instagram posts, Facebook posts and either store them on your device or delete them forever.

Scan your social media privacy settings: the app will scan the privacy settings of GAFA apps (Facebook, Amazon, Twitter, Instagram, Google) and give recommendations to be more private + a one-tap button to let Jumbo fix it

Delete searches and other recordings: Jumbo can delete on a regular basis Google searches, Google locations, Amazon voice recordings, Facebook searches, LinkedIn searches

Block 500+ trackers: trackers are the equivalent of cookies but for smartphones, allowing companies to know the user's online behavior and show targeted ads. By installing a VPN profile on device, Jumbo is able to block the most common trackers.

Enable 2FA with 1-tap on major apps: with 1 button, users can enable 2FA on Facebook, Instagram, Twitter and Google. 2FA codes are stored in the app and easy to access when needed.

Monitor your data breaches: Jumbo will monitor potential breaches daily for as many email addresses as you want and notify you immediately if any new breach is found.

Identity Theft Insurance: for users located in the US, Jumbo offers a $1M identity theft insurance, allowing users to get their money back if it gets stolen due to an identity theft.

The Android app used the following technologies:

100% Kotlin

Jetpack Compose

MVI architecture

Coroutines

Flow

Navigation Library

Moshi

Dagger2

Room