Jesús Manzano Camino

Senior Android Engineer @deblockApp. Prev @getqonto @eDreams_ODIGEO, @plex

[Chris Banes @chrisbanes]

Haze 2.0 is here, and it's a big one! 🎉

For Compose Multiplatform:
🫧 Glass with refraction & lighting
⚡ Faster blur
🎛️ Adaptive rendering quality
🎨 Reusable styles
🛠️ Build your own effects

https://t.co/Iz4rkHGjSy

[Branko @brankopetric00]

We had 100% test coverage and still shipped a critical bug to production.

How?

- Our tests mocked every external dependency
- The bug was in how we integrated with a third-party API
- The mocks returned what we thought the API returned
- The actual API had changed its response format
- All tests passed because they tested our assumptions, not reality

The bug caused a 1 hour outage.

Added contract tests. Integration tests against staging APIs. Reduced unit test coverage to 70%.

100% test coverage measures quantity, not quality. Tests that mock reality don't test anything useful.

[Jorge Castillo @JorgeCastilloPr]

Create high-converting app store screenshots in just a few minutes with ScreenshotWhale 🐋

Carefully crafted professional templates for iOS and Android to boost your app conversion.

Find it in https://t.co/6OXE1RdAkF 📸📲

[Jaewoong Eum @github_skydoves]

Just published the main page of @RevenueCat Codelabs!

The codelabs provide a step-by-step guide to building, analyzing, and growing your in-app purchases, subscriptions, and paywalls for iOS, Android, KMP, and Flutter.

https://t.co/YatTD79Sv5

[Jesús Manzano Camino @jesus_manza]

@flipper83

[Jesús Manzano Camino @jesus_manza]

@yahyabayramoglu Or our little Bobby got some educational material updated: https://t.co/MWteZ7wFht

[Jaewoong Eum @github_skydoves]

Practical performance problem solving in Jetpack Compose.

https://t.co/HEoodQDA13

[Android Developers @AndroidDev]

Introducing Watch Face Designer — bridging design and development in Wear OS. Create simple no-code watch faces or build complex faces more quickly → https://t.co/yDBkP8ecfH

[Jaewoong Eum @github_skydoves]

Room (Kotlin Multiplatform)

https://t.co/nNYrok9Vzb

[Alex Styl @alexstyl]

Introducing Compose Unstyled

Compose Unstyled is an API for implementing any design system in Jetpack Compose and Compose Multiplatform.

🎨 Token based Theming API
🍱 20+ renderless components
🎹 Keyboard navigation
🤟 Fully a11y

Link in the reply

[Tara @boredwriter1]

Every summer, fate chooses a CEO for the sacrifice. That's the ritual.

[Jaewoong Eum @github_skydoves]

Anvil Moves to Maintenance Mode.

https://t.co/LxSmSSfe08

[Amrit Sanjeev @amsanjeev]

Creating an Engaging Progress Button in Jetpack Compose https://t.co/N0V7sysvZz

[Márton Braun (write-only account) @zsmb13]

Here's your latest reminder to stop using Gson with anything that touches Kotlin, as every alternative is much better.

kotlinx.serialization is especially a great choice to be multiplatform-ready, with whatever code you're writing.

https://t.co/T9wZnBehxz

[Jesús Manzano Camino @jesus_manza]

@danielatitienei Could we nice a video to understand how important was ASO on traction (and therefore 💰). Coding is easy, selling is hard 😅

[Alex Zhukovich @Alex_Zhukovich]

Want to see how your UI adapts to different wallpapers?

You can preview dynamic colors directly in Android Studio using the "wallpaper" parameter for preview annotation.

Does your app support dynamic colors?

[Alex Styl @alexstyl]

Introducing debugln

Got tired of copy pasting the same file in all my Kotlin apps so I turned it into a library

Link in the reply

[kt.academy @ktdotacademy]

`flatMapMerge` in Kotlin Flow isn't as smooth as it seems... 👀

- Async? Not always.
- Default settings? Questionable.
- Consistency? Not always.

Think you know how it works? You might want to take a closer look. 🔍

https://t.co/g1e6lsGaJ7

[Jesús Manzano Camino @jesus_manza]

@JorgeCastilloPr Beautiful and useful passbook manager: https://t.co/UfWXpbpLBW

[Jorge Castillo @JorgeCastilloPr]

If you were rebuilding your Android app from scratch in 2025, what would you not use again?

A library, a pattern, a tool, whatever.

Let’s make this brutally honest.