Case Study
WisePay
Crypto payment processing platform — invoicing, merchant dashboard, and an embeddable widget for Bitcoin, Litecoin, Ethereum, and ERC-20 tokens.
Platform Overview
Screenshots of the WisePay platform — landing page, merchant dashboard, documentation, and embeddable payment widget.
Marketing landing page — product overview and value proposition
Merchant dashboard — transaction history, analytics, and terminal controls
Developer documentation — API reference and integration guides
Embeddable Payment Widget Flow
Pay screen → Success confirmation
Payment dialog — select currency and confirm
Success confirmation — payment completed
Engineering Highlight
Smart-contract based Ethereum payment pooling — an original approach to on-chain invoice processing.
The Problem
Bitcoin and Litecoin support separate wallet addresses per invoice easily. But Ethereum makes that economically impractical — generating a unique account for every invoice means paying deployment costs each time, making it unviable at scale.
The Solution
We designed a smart-contract based approach that identifies individual payments through on-chain blockchain events while pooling funds under a single, efficient contract structure. This eliminated the per-invoice deployment cost without sacrificing payment traceability.
This concept was not copied from an existing public solution — it was an original engineering approach developed during the project. The same architecture can be adapted to any blockchain that supports smart contracts.
Evolution
Initial testing used Geth (Go Ethereum) for running a dedicated node. The production model evolved toward external blockchain providers — a more practical and maintainable approach for real-world deployment.
Scope of Work
A breakdown of what was built, the tech involved, and the current product status.
What We Built
- ✓ Multi-currency crypto payment processing engine
- ✓ Merchant dashboard with transaction history and analytics
- ✓ Invoice generation and management system
- ✓ Embeddable payment widget for third-party sites
- ✓ Bitcoin, Litecoin, Ethereum, and ERC-20 token support
Tech Stack
Product Status
WisePay was developed to a functional, launch-ready state. The founder's priorities shifted before public launch, so the platform was not released to market. A large share of the technical and product foundation — including the core payment engine, dashboard, and widget — was built by us.
Outcome
A fully functional crypto payment platform with merchant infrastructure, invoicing, and embeddable checkout. While not publicly launched, the project demonstrates our capability to build complex financial infrastructure from the ground up.
This work is publicly referenceable by agreement with the founder. NDA details remain confidential.
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