Case study

A flagship fintech platform built from scratch.

How we designed, developed, and scaled a full-featured white-label payment system

used by clients across the EU.

How we designed, developed, and scaled

a full-featured white-label payment system

used by clients across the EU.

Who we built it for and why

Finsei is a European payment system offering digital wallets, SEPA transfers, cards, onboarding, KYC, and more. The client approached us to create a modular fintech platform from scratch — scalable, secure, and regulator-ready.

Our approach and
what we delivered

Modular architecture with web + mobile apps

Modular architecture with web + mobile apps

Modular architecture with web + mobile apps

Role-based dashboards for admins and clients

Role-based dashboards for admins and clients

Role-based dashboards for admins and clients

Realtime KYC/onboarding flows

Realtime KYC/onboarding flows

Realtime KYC/onboarding flows

Deep integrations with PSPs, banks, and card issuers

Deep integrations with PSPs, banks, and card issuers

Deep integrations with PSPs, banks, and card issuers

Multi-currency wallet management with fees and limits

Multi-currency wallet management with fees and limits

Multi-currency wallet management with fees and limits

Audit logs, permission layers, analytics

Audit logs, permission layers, analytics

Audit logs, permission layers, analytics

The stack behind the platform

The stack behind
the platform

01.

Frontend & Web

Vue, Nuxt

Vite, Vue CLI

Pinia, Vuex

TypeScript

SCSS

02.

Backend

PHP, Yii2

PostgreSQL, Redis

JWT Auth, RBAC

GitLab CI/CD

Docker

03.

Mobile

Kotlin + Jetpack Compose

Retrofit

Room

Combine

Hilt

Coroutines

Swift + SwiftUI

04.

Integrations & Infrastructure

Centrifuge

Sentry, Zabbix

Firebase, Amplitude, Adjust

Freshchat SDK

Ondato SDK

Swagger UI

The outcome

We don’t just ship features — we deliver long-term value. Here's what makes our solutions stand out in real-world environments.

Scalable infrastructure

Built to handle growth from day one — modular, cloud-ready, and production-proven.

Bank-grade reliability

Zero-downtime deployments, encrypted data flows, and battle-tested components ensure trust and uptime.

Seamless integrations

Plug-and-play architecture for banks, PSPs, card issuers, and more — no vendor lock-in.

Connected with the best
in the fintech space

Connected with the best in the fintech space

Let’s build your platform next

Looking to build your own fintech product or enhance what you already have? Let’s talk — just write to us.

By clicking "Send Message", you consent to allow KSOFT LTD to store and process the personal information submitted above to provide you the content requested.

Let’s build your platform next

Looking to build your own fintech product or enhance what you already have? Let’s talk — just write to us.

By clicking "Send Message", you consent to allow KSOFT LTD to store and process the personal information submitted above to provide you the content requested.

Let’s build your platform next

Looking to build your own fintech product or enhance what you already have? Let’s talk — just write to us.

By clicking "Send Message", you consent to allow KSOFT LTD to store and process the personal information submitted above to provide you the content requested.