Bity

Initial Situation

Bity did not have an existing system to support the purchase of gold-backed NFTs. While they already operated crypto-related services, this use case required a new backend component to handle transaction logic and integration with external services.

The new functionality needed to fit into their existing architecture and be compatible with their internal processes.

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Pain Points

The project was not driven by a malfunctioning system but by missing functionality. The main challenges were:

• No existing implementation for gold NFT purchasing
• Integration of multiple external APIs, some of which were not accessible during development
• Limited prior experience on the Sly side with crypto/NFT-specific processes
• Requirement for Bity to retain full control over deployment and operations

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Assignment

Sly was tasked with implementing a backend service that enables users to purchase gold-backed NFTs.

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The scope included:

• Structuring the system in a way that supports future modularization
• Ensuring compatibility with Bity’s existing infrastructure
• Delivering a solution that Bity can operate and extend independently

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Solution

The implementation was based on the architectural concepts of VELOX.

The checkout functionality was implemented in a tailor-made way, adapted to Bity’s requirements. At the same time, it remained close to the architectural structure and design principles of VELOX, including:

• API-first design
• Modular structure
• Separation of responsibilities

The system is therefore not a standard VELOX deployment, but also not independent of it. It is a custom implementation aligned with VELOX architecture.

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Implementation

The system was implemented as a backend service with a focus on API integration and modular structure.

Relevant aspects:

• Integration of external services via APIs, including NFT-related data sources
• Use of mock servers (Prism) to simulate APIs that were not accessible during development
• Implementation of integration tests to validate system behavior against expected API responses
• Structuring the codebase to allow future extraction into microservices

Collaboration model:

• Sly: architecture design, implementation, and technical support
• Bity: code reviews, deployment, infrastructure, and operations

After delivery, Bity took over maintenance and further development of the implemented components.

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Result

The result was a backend service that enables the purchase of gold-backed NFTs and integrates into Bity’s system landscape.

Key outcomes:

• System structured in a modular way, allowing future separation into microservices
• Bity assumed responsibility for deployment, operation, and further development after delivery
• Collaboration functioned as a shared development setup, with Sly and Bity working on the same codebase

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Summary

The project resulted in a backend implementation for a new transaction type (gold-backed NFTs), built as a custom solution that remains structurally aligned with VELOX.