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An e-commerce storefront for buying, gifting and redeeming digital gift cards.
Customers pick a card and an amount, pay through a secure checkout, and the recipient gets
the card by email within seconds. Behind it sits the part that actually matters: a balance
ledger that stays correct under concurrent redemptions, idempotent payment handling so a
retried request never double-charges, and a full audit trail of every issue and redemption.
Built
- Card catalogue, custom amounts and gift-to-a-friend flow
- Payment gateway integration with idempotent, retry-safe order handling
- Email delivery pipeline for instant card issuance
- Balance, partial redemption and expiry logic backed by a transactional ledger
The network for creativity
Join 1.25M professional creatives like you
Connect with clients, get discovered, and run your business 100% commission-free
Creatives on Contra have earned over $150M and we are just getting started
Related posts
Every card states an outcome, never a feature. The connector line makes the viewer read four separate claims as one sequence, and the last card lands as the payoff.
Rendered at 4K, so it works as a landing page hero or as a cut-down for a feed.
I do these for product teams. Tell me your main promise and I'll shape the chain around it🚀
Every card states an outcome, never a feature is a rule more product teams need tattooed on the wall. Using the connector line to make four claims read as one sequence is clever visual grammar. Rendering at 4K so it doubles as a hero or a feed cut-down is smart reuse.
One service. Completely different possibilities. 📱✨
Here are a few examples of what can be created with a custom digital business card — from professional and corporate to creative, elegant and lifestyle-focused.
Every card is custom designed specifically for the individual and their business. These examples are meant to show the possibilities, not templates you choose from.
Your colors. Your information. Your style. Your business.
📱 Flat PNG saved directly to your phone
💬 Easy to share by text, email or messaging
🚫 No app, hosting or subscription required
🎨 Custom designed — not a template
You provide the information. I handle the design.
Project Title
Async E-Learning Platform Backend
Overview
An asynchronous REST API and real-time WebSocket backend built with FastAPI, Fapix, and Tortoise ORM. Features strict Role-Based Access Control (RBAC), live multi-room chat, assessment workflows, and an automated async test suite.
Key Deliverables
Role-Based Security: Built fine-grained RBAC permission guards across 4 user roles (Admin, Supervisor, Teacher, Student).
Real-Time Communication: Designed multi-room WebSocket chat channels using structured JSON payload envelopes.
Database & Testing: Implemented async data persistence with Tortoise ORM and built an automated test suite using pytest-asyncio and httpx.
Live Demo & Source Code
Live App: https://lms-4475.de
