Financial Services

Product Engineering

Engineering a Cross-Platform Web3 Crypto Wallet for a Leading Enterprise

A leading enterprise solutions provider needed a high-performance cryptocurrency wallet. It had to bring blockchain operations and fiat financial services together into one production-grade mobile application.

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Challenge

Solution

The Outcome

The Challenge

The technical depth required across blockchain, fiat payments, and mobile performance created serious delivery risks.

Fragmented Financial Service Connection

The project required connecting seven third-party SDKs into one coherent application. These included Stripe, Ramp, Sardine, and Coin-flow. Each SDK had its own login model and transaction logic. This made building unified fiat-to-crypto purchasing and withdrawal flows difficult without breaking stability.

Bridging Native Mobile and Blockchain Environments

React Native does not talk directly to raw blockchain networks. Building a secure Web3 JS connection to Ethereum and Polygon required deep technical knowledge. Standard mobile development practices do not cover this. Custom bridging logic had to be built from the ground up.

The Solution

We built a unified React Native codebase for iOS and Android. This connects blockchain networks, fiat payment SDKs, and the client's internal Blockchain SDK within one structured architecture.

Unified Cross-Platform Codebase

‍We built the full application for iOS and Android from a single React Native codebase. This kept deployment fast and product behavior consistent across both platforms.

Financial and Blockchain SDK Connection

‍We connected seven SDKs including Stripe, Ramp, Sardine, and Coin-flow. We also connected the client's internal Blockchain SDK. Together they cover fiat-to-crypto purchasing and currency withdrawal in full.

Direct Blockchain Interactivity

‍Web3 JS was built directly into the React Native layer. This lets the application talk securely to Ethereum and Polygon networks without added middle layers.

Mobile Engagement Architecture

‍We set up Firebase across push notifications, dynamic links, and deep-link functionality. This gave the product a dependable user retention and navigation base from day one.

Performance and UI Optimization

‍We focused on code optimization and responsive UI animations across both mobile surfaces. The result is a fluid, native-quality experience built for high-stakes financial use.

The Outcome

The enterprise shipped a production-ready crypto wallet with unified fiat and blockchain functions. Clean architecture and structured development delivered clear gains across deployment speed, user experience, and platform coverage.

7 third-party SDKs connected within a single production React Native codebase.

Full iOS and Android coverage delivered from one unified development pipeline.

Firebase-powered engagement stack live across push notifications, deep links, and dynamic navigation.

We have been working with Entrans for the last two years and they have played a key role in building our solution. Their expertise and professionalism were evident throughout the development cycle, and we were very pleased with the final product. They have shown enormous skill and vast domain knowledge and their IT expertise is reliable and trustworthy. We would recommend Entrans for anyone looking for quality IT services, delivered in a professional manner

Nikolay Prokopiev

Chief Executive Officer

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