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One of the critical security bugs I found in the payment code I reviewed
and each of the bugs could have caused serious financial loss
Bug #1: Trusting the payment gateway's response amount 💸
The code:
Gateway says: charge $1,000,000
System credits: $1,000,000
User actually paid: $1,000
One compromised API response = $999,000 loss.
The fix?
YOUR database is the source of truth.
✅ Store amount at initialization
✅ Verify gateway matches YOUR record
✅ Credit from YOUR database, not theirs
Never trust external APIs with money.
Day 2/15 | Building Secure Payment Systems
#SoftwareEngineering #Security #FinTech
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🚨 A bug that looks like a frontend problem might actually be your backend.
I once spent time checking UI code, only to find the real issue was an API returning the wrong data.
When debugging, I always check the full data flow:
Frontend → API → Backend → Database
Debug the source, not just the symptom. 🔍
Have you ever found a backend bug while fixing a frontend issue?
hmm......well said
Tagline: Oru AI. Weave scattered proof into source-cited campaigns.
Flowstep Public Prototype Link: View Flowstep Prototype
Canva Video Overview Link: Watch Main Walkthrough
Canva MCP Server Demo Link: Watch MCP Integration Demo
Detailed Documentation & Notes (what's OruAI, what prompts I used, why so many, where I could spot possible product bugs, and more): View Project Notes (Google Doc)
LinkedIn post: Here
I thought I spent $120/month on subscriptions. Turns out I was off by $167. So I built the app I wished existed. It's called RELIEF. 💰
Here's the real problem : 89% of us underestimate our subscription total. Not because we're careless - because every app built to fix it is made for finance-savvy people. Dashboards, charts, jargon, rounded cards. If you're not already comfortable with all that, you close the app and keep bleeding $2,004 a year.
None of them make you "Feel" the money leaking. And feeling is the whole point. So I didn't design a finance app. I designed a sculpture.
RELIEF runs on Michelangelo's Idea - the statue is already inside the marble, you just carve away the excess.
– Your finances are the block
– Unused subscriptions are the red veins in the stone
– Cancelling is a chisel strike
– The money that returns is the figure emerging
13 screens, one system. Two colors carry all the meaning: vermilion for waste, gold for what you've reclaimed. Nothing else.
━━━━━━━━━━━━━━━
Carve it Yourself
- Live prototype - RELIEF
- X post - Social Post
━━━━━━━━━━━━━━━
WHAT YOU'RE LOOKING AT
01 · Demo - the full walkthrough: the story, the flow, and the drag-to-strike that cancels a subscription.
02 · Sites UI - the prototype in motion, no narration, just the carve.
03 · Flowchart - all 13 screens on the Flowstep canvas, wired end to end.
04 · Thumbnail - a six-second sweep across the finished canvas: strike, impact, gallery, share.
RELIEF - carve away what you don't use.
Turning subscription cancellation into a physical act of 'carving' is absolute genius. Most finance apps feel like spreadsheets wearing designer clothes - RELIEF actually makes the psychology work for you. Incredible execution on the concept and the 13 screens!