02 Cardra
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02

Cardra

Making crypto actually spendable in Nigeria.

file
cardra.startup
year
2025 —
categories
STARTUPS · WEB3
role
Co-founder

A card problem that started as a personal grudge.

Abundance

Co-founder — build, product, users, content, growth

Emmanuel Emejulu

Co-founder

01

The Problem

Crypto in Nigeria is not a speculation problem. It is a spending problem. People hold value on-chain and then hit a wall the moment they try to use it anywhere that matters — a subscription, a checkout page, a flight.

The gap between 'I have money' and 'I can pay for this' is where most crypto products quietly give up. Cardra lives in that gap.

02

The Personal Frustration

  • 01Cards getting declined for no stated reasondeclined
  • 02Online payments that simply refuse to go throughdeclined
  • 03Subscriptions renewing without permissiondeclined
  • 04No real control over the card once it existsdeclined
03

The Idea

If the card is the point of failure, make the card programmable. Not a single fragile number attached to your entire balance — a system of cards you create, fund, and destroy on your own terms.

That reframing produced the two card concepts the whole product is built around.

04

Temporary vs Permanent

One card is a home address. The other is a hotel room you check out of.

Permanent card

your daily driver
  • Long-lived, for the merchants you trust
  • Funded from your main balance
  • Freeze, unfreeze, set limits

Temporary card

burn after checkout
  • Spun up for a single purchase or trial
  • Funded with exactly what it needs
  • Expires on its own — a subscription cannot renew against a card that no longer exists
05

Crypto → Fiat, and back

The rails have to be boring and invisible. Users should be thinking about the thing they are buying, not about settlement.

  1. 01Hold on-chain
  2. 02Fund a card
  3. 03Spend in fiat
  4. 04Settle back
  5. 05Repeat
06

The Inheritance Vault

Self-custody has an ending nobody designs for. Keys die with people, and the funds sit on-chain forever with no one able to reach them.

The vault is Cardra's answer: a way to lock assets with conditions that let them reach the right people if you are no longer around to move them yourself. It is the least glamorous feature in the product and probably the most important one.

07

Building It

Smart contracts for the parts that must be trustless, a real backend for the parts that must be fast, and queues for everything that must never be lost.

  • Solidity
  • TypeScript
  • React
  • Node.js
  • GraphQL
  • Privy
  • Supabase
  • PostgreSQL
  • BullMQ
  • Redis
  • Git
  • GitHub
08

Where It Is Now

right now

  • Building
  • Going through incubation
  • Validating with real users
  • Pre-seed

what comes next

  • Deepen the card controls
  • Harden the vault
  • Grow the Nigerian user base
  • Content and distribution as a first-class channel

built with

  • Solidity
  • TypeScript
  • React
  • Node.js
  • GraphQL
  • Privy
  • Supabase
  • PostgreSQL
  • BullMQ
  • Redis
  • Git
  • GitHub
🔒 Repository is private

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