Engineering Insights

It’s the last day of Prime Day — here are over 140 great deals to choose from

We’ve arrived at the final day of Prime Day, which at this point should probably be called “Prime Week.” We’ve found discounts on all manner of gadgets, including TVs, smart home tech, chargers, headphones, and more. Some of the best deals have started selling out at some retailers, so if you’ve been craving a popular upgrade like the AirPods Max 2, time is running low. The good news is that our team is still hard at work, and in addition to the deals that remain in stock, the retailers sometime

How I Built a Personal AI Knowledge Base with Amazon Aurora pgvector and Next.js — AWS H0 Hackathon

I built ChatScroll for the AWS H0 Hackathon — an app that Every day people ask AI assistants valuable questions and ChatScroll transforms AI conversations into a personal Making search understand MEANING not just keywords. When Amazon Aurora PostgreSQL with the pgvector extension stores When a user saves a Scroll: The answer text is sent to Google's gemini-embedding-001 The model returns a 3072-dimensional vector The vector is stored in Aurora alongside the content When a user searches: The

How We Built a P2P Crypto Wallet for Ethiopian Remittances — And Why We Started With Africa

When my family sends money home to All african countries and Ethiopia, Western Union takes 8%. SWIFT transfers take 4 days. For a $500 remittance, that's $40 gone before the money even leaves. We built SEMWallet to fix this. SEMWallet is a crypto wallet and P2P trading platform built specifically for Ethiopians and the African diaspora. Users trade USDT, BTC, and ETH directly with each other — with escrow holding funds until payment is confirmed — then withdraw to All its users and merchants di

I Built a Tribology Expert System from Scratch — No Frameworks, No Backend, Just Vanilla JavaScript

Industrial tribology failures — wear, friction, and lubrication problems — cost billions annually. Yet diagnosing a failed bearing or selecting the right lubricant requires expertise spanning mechanical engineering, material science, and fluid dynamics. Most engineers don't have instant access to a senior tribologist. Instead, they rely on manually searching through thousand-page reference books, scattered spreadsheets, and trial-and-error that extends downtime from hours to days. I experienced

AINAScan Found Two Security Bugs in a Real Open-Source App — Here Is What Happened

Last week, I ran AINAScan — our AI-powered static analysis tool — against FlaskBlog, a popular open-source Flask project. It found two security issues back-to-back. Here's the breakdown. The bigger finding was a classic IDOR (Insecure Direct Object Reference) vulnerability. A user could directly reference another user's resource by ID without any authorization check. This is issue #254. The second finding — issue #258 — is subtler. In , the search results query fetches the full user row includin

Documenting my overall tech journey from the beginning will give me the needed progress check I need.

Sandboxing Reality: How to Spoof iPhone Locations for Advanced Penetration Testing

Listen up. If you’re still playing by the rules Apple wrote for you, you aren’t testing security. You’re just clicking buttons and praying the red text doesn’t show up. Real penetration testing isn’t about running a script kiddie tool and calling it a day. It’s about bending the fabric of the digital world until it screams. And right now, one of the easiest ways to make the Matrix glitch is by spoofing GPS coordinates on an iPhone. I’ve been doing this since before the App Store existed. I’ve se

Documenting my overall journey as a beginner will give me the needed progress check I need🌝