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Payment system for entrepreneurs from scratch

Mar 2020 – Present(~2 years)
United Kingdom
About Osu

Osu is helping sole trader businesses thrive by integrating a powerful business management and payment app for sole traders, with a modern, simple and elegant accounting software for accountants and bookkeepers.

Osu service include few products for all sides of payment prosecc: entrepreneurs, their clients, and accountants.

Model of cooperation with Osu
Dedicated team
You take full control of the execution of their tasks. Our software development company takes care of their retention and growth.
The team
Front-end developers
UI/UX Designers
QA Engineer
Yojji team worked on
As part of cooperation with the client, our company has provided the following services
Frontend web development
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UI/UX design
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Technologies and tools we used
Front-end Technologies
Tailwind CSS
Ant design
React Native
Osu – Yojji Partnership

Initial request

Initially, the client-company approached us with a request to design and develop a front-end of the open-banking service - a payment widget and an administration system for merchants. We have created an Osu payment widget and added a payment button to the website page. Besides, Yojji designers and front-end devs have developed an admin system where merchants can track all payments, manage users and roles, manage clients, and customize the widget using visual themes or choose their brand colors. Continuing the partnersip after launching of MVP Owing to the high level of professionalism, we have managed to launch this MVP in a short time, and the client decided to continue our cooperation. In two months, we have created a functional MVP app that enabled users to create payment requests and track paid requests. Our team has been invited to work on the front-end development of a mobile application for individual entrepreneurs and service providers. As the project grows and develops to this day, we are constantly working on improving it and adding new features.

Our Approach

Agile principles

Our work is based on two main pillars: Agile principles and an iterative approach. Therefore, we effectively carry out the assigned tasks and can adapt the project to new requirements at any stage of development. One of our core principles is a constant focus on technical excellence and architecture quality. We strive to deliver a fully functional product every few weeks, so we use a sprint system. In close cooperation with the back-end developers of the client-company, we have conducted a series of cycles. Each cycle was dedicated to the development of new features that improved the initial project. Thus, we have created a well-functioning product two months after the beginning of the development.

One of our top priorities is good communication between employees, as it contributes to achieving the most effective results. Thereby, we hold daily meetings to set goals and discuss objectives. During the release phase, our team conducts additional meetings to ensure that the final product fully meets the customer’s requirements.

Challenges and Solutions

We had to meet strict deadlines

Yojji has extensive experience working with startups, so we have developed individual approaches that allow us to provide effective solutions in a short time. Thanks to the flexible development methodology and excellent time management skills, we have managed to create an MVP in two months, and over the next few months, we have significantly expanded the functionality of the application.

We had to add new features during the development process

During the development process, the client-company asked us to add several additional features. Thanks to a professional approach, Yojji promptly made all the necessary changes.

Want to digitize in the financial sector?

Let’s create the next big project in the financial domain together. We apply our experience, growing expertise, and innovative tech stacks to develop a financial solution that will win over the market.

Products & Features


Create and Send/Resend payment request to the client, track payments, payment reminders, invoicing, referral plan, CRM + import clients from phone contacts, scan to pay, face ID and Fingerprint authorization, manage notifications, contact support with Intercom, emails for all features, limits according to plan, walkthroughs + Login and Registration

Feedback from client
The client considers Yojji a fully integrated part of their team. Their resources show a high level of skill, professionalism, and organization. They participate in daily meetings, are able to work independently, and can offer input on project scopes when asked.
Noam Nevo
Co-founder of OSU


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We discuss your project even if you have just an raw idea


We choose a model and approach that are suitable for your case and budget

Meet up in person

NL, Amsterdam

Ildar Kulmuhametov
Ildar Kulmuhametov
CEO, Co-Founder

USA, Austin

Yevhen Piotrovskyi
Yevhen Piotrovskyi
CTO, Co-Founder