Leading mobile and web engineering teams. Currently building on the cutting edge of react native. Past: dabbled with native engineering on iOS, Android & web.
Bengaluru, India
Joined April 2008
- Tweets147K
- Following265
- Followers2.8K
- Likes7.6K
Rahul Mathur retweeted
Last month, we demonstrated high-rate alchemy: turning mercury into real, stable gold, beating CERN’s record by a factor of 10.
Last week, we enriched isotopes in the world’s most powerful plasma centrifuge, beating the Soviet record that stood for 40 years.
Now, we’re building a fusion reactor in San Francisco to achieve record power density.
Rahul Mathur retweeted
this is a good moment to launch iknowaguy.help/bangalore/. now everyone is just a call away. i’ve already gotten two spots from the video fixed and cleared by just one phone call. before and after images below.
most of us never try but the numbers for engineers, marshals, inspectors and elected officials are public. they're just scattered across a dozen websites. so you end up calling a generic helpline, get passed from person to person, and give up.
i called mr. vijay, our area inspector. he was on site within 30 minutes and we walked all of 12th main together. we are working through every spot from caleb's video over the next 2–3 days. im going to fix everything shown in the video with BBMP. more updates soon.
Rahul Mathur retweeted
Thrilled to bring Apple Pay to India!
Rahul Mathur retweeted
The problem with all of these AI personal assistant things is that people don’t actually want to do stuff.
You fucking get that right? Do you understand that?
Just like AI tools in the workforce, AI assistants don’t actually abstract decisions for you, they let you accelerate decision making.
So instead of making one decision a day and then lamenting you can’t do more, AI assistants are going to let you make ten decisions a day and act on all of them.
A miracle?
Nah dog, a fucking nightmare. Nobody except type A strivers who need Twitter fodder actually want that.
Let me tell you a story.
When I got back from college I was inspired. If I could take on an elite university with grit and determination, so could everyone I know.
I was all razzed up to get people I know to achieve their potential. What I learned after many years of trying is that absolutely nobody wants to realize their potential.
People want to hang out with friends and complain. That’s how the world has worked for ten thousand years. This weather fucks. Can you believe the cows walked off.
People don’t want enablement. People don’t want you to take all of their excuses.
TV is mindless passive activity. AI assistants are not. They’re telling people that they can achieve more. And people absolutely do not want that.
Let me tell you another story.
Once upon a time I lead a big process overhaul at work and it was great. Two years later I hired a contractor to do something similar. But I personally didn’t want to have to do a bunch of work.
Within a week I knew I fucked in. This contractor kept coming to me with decisions I needed to make. Dude I wanted to not have to think about this.
Again, a helper when you don’t actually want help is a disaster.
None of these AI assistants will take off because people don’t actually want assistants.
Rahul Mathur retweeted
SwiftUI isn’t native and here’s why SwiftUI apps may sometimes feel janky. It ditches the key element that made animations run so smoothly on iOS since the original iPhone: Core Animation.
In SwiftUI animations run in-app without CA backing. Block the main thread: SwiftUI ball stalls while UIKit’s keeps moving on the render server.
Rahul Mathur retweeted
Here's how I'd start a React Native app today if I want it to be native: USE THE PLATFORM, don't reinvent the wheel. My must-haves:
- react-native-screens from @swmansion, together with @reactnavigation. Native stack, native tabs, formSheet for bottom sheets, native modals, SF Symbols, Material Symbols, etc. Keep an eye on v5.
- expo-ui from @expo for SwiftUI and Jetpack Compose components in JSX. Missing one? Have AI write it and contribute it back.
- Nitro Modules from @margelo_io for low-level, fast native code (Swift, Kotlin, C++). Some good examples: react-native-mmkv for key-value storage (a must), react-native-healthkit, react-native-nitro-fetch.
- expo-sqlite + drizzle-orm from @DrizzleORM if you need a local database.
- Legend State from @jmeistrich. Write proper selectors, watch your re-renders, and close subscriptions on unfocused screens (think Android onResume/onPause). Be methodical. This is not the web, and React Compiler won't do it for you.
- Do not block your app startup with anything. You should not need a splash screen if you don't want one.
Use whatever tools you want. But React Native does not mean your app isn't native under the hood. Your iOS and Android builds end up very, very different, on purpose. You're just using abstractions that smart people built and keep curating for you.
Do this and when something like the iPhone Duo comes out, your app just works on it. You were already using native navigation, sheets and components, so the platform adapts them for you.
Rahul Mathur retweeted
Always a big Red ♥️🤍
Introducing our 2026/27 @adidasFootball third kit 🖇️
Rahul Mathur retweeted
🚨 NEW UPI SCAM: The "Rogue Auto QR Code" Device Takeover 🚨
A highly sophisticated UPI scam is targeting commuters using Android phones. Within minutes, victims are seeing their bank accounts linked to remote devices without their consent.
Here is exactly how this technical exploit works and how to protect yourself:
💻 The Mechanics: How It Happens
1. The Hijacked QR: The fraudster displays a custom QR code. It does not open a secure payment page. Instead, it triggers an Android deep-link "Intent" payload.
2. The Forced Verification SMS: The malicious code forces the victim's phone to draft and send a hidden, encrypted UPI registration token (like the cryptic HDFCUPI... text seen at the bottom of the screenshot).
3. The Remote Device Bind: The scammers enter the victim's phone number into multiple banking apps on *their own burner devices*. When the victim's phone broadcasts that encrypted SMS token, NPCI systems mistakenly validate the *scammer's* phone as the legitimate primary device.
4. The Multi-Bank Explosion: Once the phone number is bound to the scammer's handset, automated scripts fetch every bank account linked to that number (HDFC, Axis, ICICI, etc.) in a matter of minutes.
🛡️ 100% Sure-Fire Kill Switches
If you or someone you know receives a sudden flood of UPI activation messages:
* Dial *99# Immediately: From the affected SIM, dial this universal USSD code. Select the option to Block UPI or Disable UPI Profile. This works instantly across all banks without needing internet.
* Call 1930: Reach out to the National Cyber Crime Helpline immediately to report active device-binding fraud and freeze downstream channels.
* Check SMS Forwarding: Dial *#21# to ensure the hacker hasn't secretly set up call or SMS forwarding. If they have, dial ##002# to wipe it out.
* De-register Your Apps: If you still have access to your Google Pay, PhonePe, or BHIM apps, go to settings and select De-register UPI Profile. This forces a termination of all external sessions.
💡 Golden Rule of Prevention
NEVER scan a street vendor or driver's QR code using your phone's default camera app or generic QR scanners. Always open a trusted, official app like Google Pay, PhonePe, BHIM, or your official banking app to scan. Safe payment interfaces will strictly block malicious device-binding intents.
Stay vigilant and share this to protect others! 🧵👇
#CyberSecurity #UPIFraud #TechExplained #SafeBanking #India @Cyberdost @MTPHereToHelp @MumbaiPolice
My sister booked an Uber auto MH02EF3779. After the ride, the driver showed a fraudulent QR code. My sister suspected this and paid in cash. However, after a few minutes, she started receiving many messages from different banks for UPI registration. Please help. @MTPHereToHelp
@MahaCyber1 @Cyberdost @UberIN_Support
Rahul Mathur retweeted
Expired meat, fish & milk found in Bengaluru’s top luxury hotels.
30 teams inspected 26 three-star & five-star hotels across BBMP limits today. 35 food samples collected for lab testing.
Hotels where food was seized:
• The Lalit Ashok – 76 kg meat, 200 kg vegetables & 32 litres expired milk
• Shangri-La Bengaluru – 15 kg meat
• Four Seasons Bengaluru – 19 kg meat
• Vivanta Whitefield – 3 kg expired bakery products
• Taj Yeshwantpur – 72 kg meat/fish
• Radisson Blu (The Atria) – 105 kg expired food (50 kg chicken, 25 kg meat, 23 kg fish, 7 kg vegetables)
Violations included expired food, fungal growth, unhygienic kitchens, misbranding, FSSAI labelling violations and improper veg/non-veg storage. Notices issued; further action to follow after lab reports. #Bengaluru #FoodSafety
Rahul Mathur retweeted
it never was
nocode failed because it believed coding was the problem
people are the problem
Rahul Mathur retweeted
Stunning. Have babies from your skin cells. Infertility is over. Freezing eggs. Over. IVF. Over.
I’m so excited to share this update on @Conception –
We’ve generated the first early human eggs derived from stem cells.
This is a big deal -- the potential to redefine fertility is real.
Rahul Mathur retweeted
Fast forward 3 months: a Chinese AI lab drops a model that beats Fable 5 and GPT-5.6 across major benchmarks.
Then we all look back and laugh at the fact that Fable 5 was banned for weeks.
Rahul Mathur retweeted
local gym owner warns people lifting weights at home are on a “very dangerous path”
Just dropping by to say that GLM 5.2 + Cursor harness is genuinely wild.
Don't sleep on @Zai_org — they are here to take the 👑
Rahul Mathur retweeted
India in 2024 owned a quarter of the ACs China did in 2007, at the same income.
Rahul Mathur retweeted
🛂 Visas @FlyingArena has handled recently:
🇨🇳 China
🇪🇺 Schengen (Austria, Germany, Spain, France)
🇯🇵 Japan
🇸🇬 Singapore
🇦🇪 UAE
🇻🇳 Vietnam
🇭🇰 Hong Kong
🇬🇧 UK
🇺🇸 USA
Based in Chennai, our clients are across India & abroad
If you or your friends need visa help, reach out. We can't promise approval — but we have a 100% record to date and treat every application like it's our own
Recently @FlyingArena worked with a customer for their China 🇨🇳 Tourist visa.
💵China requires minimum 1Lakh balance in your bank account for a 6 month period per person not FD or Demat account
📄No invite is required for Tourism from anyone in China
✈️Tickets and Hotel bookings required
Submit all documents online for review
If approved, pay partial fees online and submit passport in Delhi, Mumbai or Kolkata based on jurisdiction. We handled it end to end and the process took about 2-4 weeks. #ChinaVisaforIndians #indiaChina
