When it comes to fintech and crypto, many expect magic or overly complex systems. At Evrone, we take a simpler approach: if a task can be solved with classic tools without compromising quality – that's how we solve it.

The txn.pro project is a perfect example. It's a B2B service for sending and receiving crypto payments with automatic fiat conversion. The client needed a reliable, working product that wouldn't fall apart and could scale easily. So we built a minimum viable product with the right architecture from the start.

The backend is Ruby on Rails. Blockchain and liquidity integrations were moved into separate modules – keeping the core isolated and allowing load to scale independently. We chose a modular monolith: if the project grows, we can split it into microservices seamlessly. Our DevOps engineer planned the infrastructure from day one: DigitalOcean for staging, AWS for production.

The frontend is React with TypeScript, using a DDD approach – split into clear layers so development stays fast over time. For the design, we presented two concepts: one with dense, Excel-like data (familiar to experienced users) and a more creative alternative. The client chose the first – giving txn.pro its confident, industry-standard look.

Even in a dense interface, we kept beginners in mind. We added subtle hints and broke complex scenarios like 2FA setup into steps so users wouldn't get lost. Special attention went to transaction validation – in crypto, mistakes are costly, and the interface should prevent them at every turn.

The project is live, running smoothly, and we continue to provide support.

No uniqueness for the sake of uniqueness. Just a clear tech stack, clean architecture, and no headaches for the client during maintenance. If you need a crypto gateway or solid fintech development – we at Evrone deliver without surprises.

👉 More details.