Luke Brandon Farrell

Senior Software Engineer at Callstack | Author of The @reactnativerwd 🛸 | Trusted by 1,000+ React Native Developers

[Lech Kalinowski @LeSiOO]

Give it one sentence + a deadline. It plans, scaffolds, installs native deps, runs the app on a simulator, screenshots itself, iterates on the visual bar, writes tests, and ships.

Brain: @Callstack's Apex LLM (it speaks React Native).
Hands: Nous Research's Hermes agent.

Unattended, in ~15–30 min each, it shipped a Skia semantic-graph note app with on-device TF-IDF linking, a shader glass-slab toy, and a breathing-orb guide — all verified on simulator.

When a build white-screened, it diagnosed the Reanimated/New-Arch bug, fixed it, and re-verified itself.

This is the future of mobile dev. 🧵👇

[Luke Brandon Farrell @lukebfarrell]

@BoazWith Agreed! But comparing Nitro Modules to the async bridge architecture is incorrect. I have seen this comparison in a couple of libraries based on Nitro modules.

[Luke Brandon Farrell @lukebfarrell]

Just released a fun little React Native library for temperature badges with colour scales🌡️

Check it out 👉 https://t.co/SkpY3unjPF

#ReactNative #OpenSource #MobileDev #JavaScript #TypeScript #WeatherApp #DevCommunity

[Luke Brandon Farrell @lukebfarrell]

@Ayushfounds Sure let's chat, are you able to DM me?

[Luke Brandon Farrell @lukebfarrell]

@reactuniverse_

[Luke Brandon Farrell @lukebfarrell]

#10YearsOfRN

[Luke Brandon Farrell @lukebfarrell]

@Loomu_ai @itnext_js Thanks!

[Luke Brandon Farrell @lukebfarrell]

Today I polished off several issues with our Magic Link features. Essentially, we need a Magic Link feature because we’ll be publishing the product on an existing Etsy store. So, when users purchase via Etsy, we need a way for them to design their book and place their order based on the Etsy purchase they’ve already made. Magic Links allow us to set that up and send Etsy users directly to customise their book, without going through the same journey and checkout flow as regular users.

Tomorrow I'll start adapting all of this onto a mobile app 🤞

#shipaton2025 #shipaton #buildinpublic

[Luke Brandon Farrell @lukebfarrell]

Okay, I couldn’t help myself—I built a simple orders table for customers and an order details page you can access by clicking into the orders.

TBH, it’s super simple right now and will probably need some improvements, but it’s enough to get us rolling for the B2C launch for #shipaton2025. This way I can start focusing on the mobile app experience and our AI-based journaling. More to come…

#buildinpublic #shipaton

[Luke Brandon Farrell @lukebfarrell]

I already had Cursor background agents make two PRs. I mean, I’m not going to trust it with just anything, but for some of the smaller things, I’ll let it run a first draft.

[Luke Brandon Farrell @lukebfarrell]

Today, I won’t be diving into anything too code-heavy. Instead, I focused on organising our Linear Board to give us a clear path toward multiple releases.

The first release is coming next week, where we’ll launch the B2C web portion of the app. (Remember, the codebase is built with Tamagui and multi-platform technologies, so we’ve had native in mind this whole time). This release will let customers start building books. We’ve already done some extensive user testing, but we’re open to more—so if anyone wants a free memory book DM me, wink wink 😉.

Next week, I’ll be polishing the final touches on the B2C experience, then switching over to the mobile app to get it ready for launch. We’ll first release the mobile app with the B2C experience, and later in September—just in time for the Ship-a-ton Hackathon—we’ll add AI-powered journaling, premium templates, and memory-building features, all behind the RevenueCat SDK.

But for today, it was all about Linear—planning out what the next week will look like, while also taking advantage of the new background agent feature in Cursor.

#buildinpublic #shipaton #shipaton2025 #cursor #linear #reactnative #revenuecat

[Luke Brandon Farrell @lukebfarrell]

Put it all together and we’ve got a cross‑platform ImageViewer. 😎 I’ll probably need to do a bit more work to make it fully cross‑platform, but Tamagui got us most of the way there—there may be some remaining work around the sortables.

[Luke Brandon Farrell @lukebfarrell]

Yesterday and today I worked on an ImageViewer component with reordering. The reordering was important so we can define the media order on our listings in our application. The ImageViewer is built with Tamagui and supports adding, deleting, viewing, and reordering photos. It’s pretty generic and could fit into any app.

If this gets 100 likes, I’ll drop the full component for free after the Ship-a-ton Hackathon.

I included an architecture breakdown below.

#shipaton #buildinpublic

[Luke Brandon Farrell @lukebfarrell]

Next, we have a Carousel component. On mobile, you can swipe left/right to change photos, and it simply displays a photo or video.

[Luke Brandon Farrell @lukebfarrell]

I just entered 𝗟𝗶𝘁𝘁𝗹𝗲 𝗘𝗺𝗼𝘁𝗶𝗼𝗻𝘀 into the RevenueCat Ship-a-thon. 🚢

𝗟𝗶𝘁𝘁𝗹𝗲 𝗘𝗺𝗼𝘁𝗶𝗼𝗻𝘀 is software for building 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗲𝗺𝗼𝗿𝘆 𝗯𝗼𝗼𝗸𝘀.

We’re launching features like:

➡️ 𝗘𝗱𝗶𝘁𝗮𝗯𝗹𝗲 𝘁𝗲𝗺𝗽𝗹𝗮𝘁𝗲𝘀 you can customise
➡️ 𝗝𝗼𝘂𝗿𝗻𝗮𝗹𝗶𝗻𝗴 𝗳𝗹𝗼𝘄𝘀 to capture memories
➡️ 𝗣𝗿𝗶𝗻𝘁-𝗼𝗻-𝗱𝗲𝗺𝗮𝗻𝗱 𝗯𝗼𝗼𝗸𝘀
➡️ 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻𝘀 to unlock premium templates

For the hackathon, our focus is the 𝗺𝗼𝗯𝗶𝗹𝗲 𝗮𝗽𝗽 (𝗶𝗢𝗦 + 𝗔𝗻𝗱𝗿𝗼𝗶𝗱) — but we’re building everything as a 𝗨𝗻𝗶𝘃𝗲𝗿𝘀𝗮𝗹 𝗔𝗽𝗽, so the same codebase runs on Web, iOS, and Android.

Here’s the stack we’re working with:

➡️ 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 + 𝗘𝘅𝗽𝗼 for building cross-platform
➡️ 𝗧𝗮𝗺𝗮𝗴𝘂𝗶 for the UI layer (so we can share components across web & native)
➡️ 𝗔𝗽𝗽𝘄𝗿𝗶𝘁𝗲 as the backend (auth, storage, syncing)
➡️ 𝗥𝗲𝘃𝗲𝗻𝘂𝗲𝗖𝗮𝘁 for subscriptions and paywalls

We’re aiming to 𝗹𝗮𝘂𝗻𝗰𝗵 𝗯𝗲𝘁𝘄𝗲𝗲𝗻 𝗻𝗼𝘄 𝗮𝗻𝗱 𝗦𝗲𝗽𝘁 𝟯𝟬𝘁𝗵.

I’ll be sharing progress, challenges, and lessons learned about the stack 𝗮𝘀 𝗽𝗮𝗿𝘁 𝗼𝗳 𝗯𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝗶𝗻 𝗽𝘂𝗯𝗹𝗶𝗰.

RevenueCat Ship-a-thon: https://t.co/FM77mEw9KF

#ReactNative #RevenueCat #shipathon #buildinpublic #MobileDev #IndieDev #Subscriptions #Appwrite #Tamagui #Expo

[Luke Brandon Farrell @lukebfarrell]

@damienghader @boltdotnew Bolt

[The React Native Rewind @ReactNativeRwd]

https://t.co/siSinFWVcm

[Luke Brandon Farrell @lukebfarrell]

I ❤️ ChatGPT Canvas