Andrei MarchenkoSelected worksLinkedin

Fluid Finance — P2P Marketplace

Background

Fluid Finance SA was a Swiss fintech startup founded in 2021
and headquartered in Geneva, Switzerland. It was a bank alternative linked
to a Web3 wallet, aiming to bridge traditional banking with cryptocurrency
in a single app.

Company offered:

Project context

A P2P (Peer-to-Peer) crypto/fiat marketplace is a platform that allows individuals
to buy and sell cryptocurrencies directly with each other, without a centralized intermediary (like a traditional exchange) handling the transaction.

How it works:

Instead of buying crypto from an exchange's order book, you transact directly
with another person. The platform typically acts only as a middleman
for trust — holding funds in escrow and facilitating communication
but does not take the other side of the trade itself.

Key characteristics:

Product goal

Create a scalable P2P marketplace that enables users to trade cryptocurrency directly, supported by trust mechanisms such as escrow and reputation systems, along with flexible pricing and local payment options for the financial none-savy
audience.

My role in the project

As the product designer on this project, I was responsible for leading
the end-to-end design of the Investments section, from defining
the information architecture to shaping the user experience and interface.

⚠️ Important note

To further understanding of the final user interface design, it's important to note
that the app was initially
designed vertically to make it easier for developers
to adapt the design to smartphone browsers.
Also I need to mention
that for readability user flow (in the example) will be presented in a vertical way too because P2P-flows are complex and have a lot of screens.

Process

In the team we identified important criteria for the interface based on feedback
from our users who have a different experience with other P2P-services.
In collaboration with business analysts and CPO we created requirements lists
based on received information.

Client P2P requirements

Agent P2P requirements

Also I developed a visual user flow to align the team on the features before moving into interface design.

Client and Agent user flows

The stakeholders shared their in-depth industry knowledge, product vision
and relevant references. I carried out a competitive analysis to uncover patterns across competitors and extract insights to the design.

To be honest, it was hard to create this one because, as I said before, layout
of the Web App
was pretty unusual — main concern was is how to put so much information
on so small space and don’t overload visual architecture.

Client UI • Main screen

For design of the Filters section I also tried to reduce information overload
because financial apps deal with a lot of data and filters let users narrow things down, making the app usable instead of chaotic.

When users can precisely control what they see, they feel more confident that
the app is accurate and transparent. This contributes to improvement of UX.

Client UI • Filters section flow explanation

The next step was the design of the Agent User Interface part and here I decided
that we need to stepout from our legacy vertical layout because for the agent
it's crucial to see orders list created by him and at the same time offers that he
received from his clients

Agent UI • Main screen in empty state

Agent UI • Offer creation process

Agent UI • Created orders and offers representation

Agent UI • Offer detailed view

Agent UI • Chat example

For better understanding of the order creation flow here you can see demonstration of the process represented by user interface screens with detailed information
of each step.

We tested this scenario on our focus group of the end users several times.
I inquired about what they observed, what actions they wanted to take
and what outcomes they expected. Subsequently, I asked if the actual results aligned with their expectations. Overall feedback was positive.

Order creation process by the client, order processing
by the agent and the status model
based on scenariofiat-to-fiat P2P exchange

Outcomes

While the Investments feature was successfully launched and drove significant user growth, the P2P marketplace was completed at the design stage
but not released due to company closure.

The work established a comprehensive framework for peer-to-peer trading, including trust systems, transaction flows and edge cases, positioning the product for future scalability and increased liquidity.