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Hello here is my application presentation!
I built FerroviaX, a secure B2B marketplace designed specifically for cross border metal trading.
I built it because metal trading can involve large transactions, unknown suppliers, payment risks, and uncertainty around the quality and origin of materials. I wanted to create a platform where businesses can trade with greater confidence through verified companies, transparent listings, order tracking, and secure transaction workflows.
FerroviaX is my vision for making industrial metal trading more trusted, transparent, and reliable.
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Stacks Shield
Private peer-to-peer payments on Stacks Blockchain a Bitcoin Layer 2 , powered by zero-knowledge proofs.
Stacks Shield is a privacy application that enables users to shield STX and SIP-10 assets such as sBTC and USDCx, transfer value privately, split and merge shielded notes, and withdraw funds to a transparent Stacks address.
The application addresses a simple problem: blockchain transactions are publicly visible, making it difficult for users to maintain financial privacy when sending or receiving assets.
Stacks Shield uses zkSNARKs to prove that private transactions are valid without exposing the underlying note ownership and transaction details.
WHAT USERS CAN DO
Shield STX, sBTC, or USDCx into a private pool
Scan for their encrypted shielded notes
Transfer assets privately to another shielded address
Split shielded notes
Merge shielded notes
Withdraw assets to a transparent Stacks address
The application has been tested end-to-end on Stacks Testnet with STX, sBTC, and USDCx.
HOW WE BUILT IT
The privacy protocol is powered by a stack of zero-knowledge infrastructure, including zkSNARK circuits, zkVerify, Stacks/Clarity smart contracts, an API, relayer, and a developer SDK.
For this challenge, we used Bubble to design and build the frontend application, creating the user interface and interaction experience that brings the underlying privacy infrastructure together into a usable product.
The goal was to make a technically complex ZK privacy system feel simple from the user's perspective: select an asset, choose an operation, and let the application handle the underlying cryptography and blockchain infrastructure.
WHY BUBBLE
One of the reasons we chose Bubble for the frontend was to focus on product experience rather than spending the challenge rebuilding UI infrastructure from scratch.
Bubble allowed us to rapidly design and build the application interface around an already-working blockchain privacy protocol and turn a complex ZK workflow into a user-facing application.
The result is a frontend where users interact with familiar payment flows while the underlying system handles shielded notes, proofs, verification, relaying, and Stacks transactions.
Links
Live App:
https://shield-stx.alkebulant.com
Hmmm the search console shows that you didn't use Bubble as a frontend at all 🤔
A smart and simple platform designed to help parents stay informed and organized about their children's health.
Wish you the best
Excited to share my submission for the #Bubble Free-For-All!
The project is Apero, a business concept focused on improving the restaurant dining experience. Instead of patrons getting bored or annoyed waiting for their food, Apero provides lightweight entertainment right at the table.
I’d been working on Apero prior to this, so I decided to see how far I could take the web build using Bubble to build it completely from scratch. The AI assistant was super helpful for quick iteration, but what really stood out was how seamlessly I could manage custom workflows, complex datasets, and distinct project pages.
Improvements are still underway, and testing with real restaurants will begin soon! However really happy with how it turned out so far and I'm excited to see all the other competition entries! 🙌
Check it out and let me know what you think!
