Project ideas from Hacker News discussions.

Europe's $24T Breakup with Visa and Mastercard Has Begun

📝 Discussion Summary (Click to expand)

1. The EU’s struggle to build a single, sovereign payment network

“The problem is that these networks are national and not European, let alone global.” – Beretta_Vexee
“If banking players cannot agree, then regulation (or the threat of regulation) must be used.” – Beretta_Vexee

2. Wero as the flagship of that effort – a phone‑based, card‑free alternative

“Wero are not in the business of issuing cards, though obviously they could get into that business.” – bux93
“Wero lets users send money using just a phone number.” – startupsfail

3. Fragmentation and the need for interoperability

“The real problem is interoperability, too many players and geographical fragmentation.” – Beretta_Vexee
“The EU is playing a different game… it works with regulations, trade deals and economic incentives.” – saubeidl

4. Practical hurdles for consumers and merchants

“My wife found out her new card was Discover debit card right before her trip to France… the new card didn’t work anywhere.” – yardie
“Most merchants don’t work with Visa and Mastercard, they work with payment processors… that already abstract all the different cards away into a unified flow.” – account42

These four themes capture the discussion’s focus on the EU’s attempt to replace Visa/Mastercard, the role of Wero, the regulatory‑interoperability challenges, and the real‑world usability issues that will determine success.


🚀 Project Ideas

Generating project ideas…

EuroPay Global Card

Summary

  • A virtual, EU‑issued card that plugs into the existing Visa/Mastercard network but is branded “EuroPay” and offers zero foreign‑transaction fees.
  • Enables travelers to use a single card worldwide without the Discover/Capital One headaches.
  • Core value: seamless global acceptance with no hidden fees and instant activation/deactivation via a mobile app.

Details

Key Value
Target Audience Frequent international travelers, expatriates, EU residents with foreign‑card issues
Core Feature EU‑issued virtual card, zero foreign‑transaction fees, instant app‑based activation
Tech Stack Mobile app (iOS/Android), backend in Go, PostgreSQL, Stripe/Adyen API for card issuance, OAuth2 for bank integration
Difficulty Medium
Monetization Revenue‑ready: subscription + per‑transaction fee (0.5 %)

Notes

  • “MonkeyIsNull: Nothing in France takes Discover” – EuroPay solves this by ensuring all merchants accept the card via Visa/Mastercard.
  • “ysito: Yeah, really dumb move on the part of Chase bank” – EuroPay removes the need for banks to switch to Discover.
  • Travelers will love the instant app control and no foreign‑fee surprises.

QRPay for Small Shops

Summary

  • A low‑cost QR‑code payment system that works on any smartphone, no POS hardware, offline mode, and no Apple/Google dependency.
  • Provides instant SEPA settlement and a simple merchant dashboard.
  • Core value: enables micro‑merchants to accept card‑like payments without expensive terminals.

Details

Key Value
Target Audience Street vendors, small cafés, local markets, pop‑up shops
Core Feature QR‑code scanner, offline caching, SEPA instant settlement
Tech Stack React Native app, Node.js backend, PostgreSQL, Stripe/Adyen for settlement, local caching with SQLite
Difficulty Medium
Monetization Revenue‑ready: flat monthly fee (€5) + 0.3 % per transaction

Notes

  • “anal_reactor: Fun fact: until about a year ago it was not possible to pay using normal debit cards in most Dutch shops” – QRPay fills this gap.
  • “glenneroo: I use ING DIBA bank. I enabled WERO in the app” – QRPay offers a simpler, cheaper alternative.
  • Merchants will appreciate no need for expensive hardware and instant payouts.

Unified EU Payment API

Summary

  • A single API that aggregates all EU digital wallets (Wero, Bizum, BLIK, Payconiq, etc.) and converts them to local currency instantly.
  • Provides a merchant dashboard, fraud monitoring, and low settlement fees.
  • Core value: merchants can accept any EU wallet with one integration.

Details

Key Value
Target Audience E‑commerce sites, online marketplaces, small to medium merchants
Core Feature Multi‑wallet aggregation, instant settlement, fraud detection
Tech Stack GraphQL API, Rust backend, Kafka for event streaming, PostgreSQL, Redis
Difficulty High
Monetization Revenue‑ready: per‑transaction fee (0.25 %) + monthly API tier ($50–$500)

Notes

  • “mhitza: As far as I know the 'digital euro' should allow for offline/on‑device wallet” – this API bridges offline wallets to online merchants.
  • “Jyaif: People here don’t understand that Visa and Mastercard get only a small part of the fee” – our API keeps fees low.
  • The discussion about “Wero” and “Bizum” shows a clear need for a unified solution.

Travel Wallet with Offline NFC Card

Summary

  • A mobile wallet that aggregates multiple cards and digital wallets, plus a small NFC chip card for offline use.
  • Auto‑activates a backup card if the primary fails and works without an internet connection.
  • Core value: travelers can pay anywhere, even in offline or low‑bandwidth environments.

Details

Key Value
Target Audience International travelers, expatriates, frequent flyers
Core Feature Multi‑wallet aggregation, offline NFC card, auto‑fallback
Tech Stack Kotlin/Swift mobile app, NFC tag writer, backend in Go, PostgreSQL, integration with bank APIs
Difficulty Medium
Monetization Revenue‑ready: subscription (€9.99/month) + optional NFC card (€19)

Notes

  • “tlogan: So Wero is not a credit card” – Travel Wallet provides a physical fallback.
  • “SpicyLemonZest: I don't really understand why this is better than tap and pay with a card” – the offline NFC card solves that.
  • Travelers will love the peace of mind that they can always pay, even if their phone dies.

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