CloseCross case study: a decentralized derivatives trading platform - Espeo Blockchain


Based in the UK, CloseCross offers a transparent derivatives trading platform based on the blockchain.


Business challenges

The client patented his decentralized derivatives trading platform a while ago, but there was no technology available that could provide the user with full transparency of the investment process. Blockchain solves that problem, so it became the natural choice. Our head of blockchain and the rest of the Espeo team were chosen to turn the CloseCross idea into reality.

Technological challenges

We had to avoid any single point of failure, so it was clear this was to be a decentralized product. It was a challenge since very few similar solutions have been built so far and we practically couldn't use anything as a model. We also needed to handle transparency issues — the customers have to see in real time how other investors behave. Finally, the CloseCross platform had to be visually intuitive.


The backend was a combination of REST API (Node.js, Kotlin, RabbitMQ, Spring) and public blockchain (Ethereum smart contracts). As part of our design services, we also provided the landing page design — as well as designed and implemented mobile frontend (React Native). One of the most interesting things we've done is a receipt exchange protocol based on state channels. These receipts are signed by both the server and the user with their cryptographic keys so that anybody can verify that both parties have intentionally taken part in the transaction. In our blog post, we explain in more detail how we've built this blockchain trading platform.

End result

Espeo created the architecture and developed the entire blockchain-based platform: one of our most complex fintech projects to date.


We delivered

Blockchain development

Frontend development



Espeo has been great throughout our project. Very responsive, quick execution and always available for quick tasks and clarifications. I would definitely use them for other projects.

Vaibhav Kadikar

Founder and CEO

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