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Osu

Osu is a business management and payments app for sole traders, integrated with accounting software. Yojji team built the front end for Osu’s open-banking service. It includes a payment widget and an admin dashboard for tracking transactions, managing users, and configuring features. After the MVP launch, we expanded the product with payment request flows and continue to develop the mobile app with new functionality.

client

Osu

industry

Fintech

platform

Web & Mobile

31 months

Duration

6 employees

Team

REQUEST

Osu requested a payment widget and admin system for tracking payments, with an MVP for managing requests. After launch, they chose to continue the partnership and expand to a mobile app.

CHAllENGE

The project required creating a production-ready payment solution in a short timeframe, while the product volume continued to grow. We had to release a stable payment widget and administration system on time, quickly adapt to new payment flows and regulatory constraints, and maintain a stable user experience as the product expanded.

OUR SOLUTION

We delivered a production-ready MVP in two months, starting with an open-banking payment widget and an admin dashboard. We then expanded the product into a full ecosystem: a mobile app for payment requests, reminders, invoicing, and client management. Then our team delivered a billing portal and marketing assets to support launch and growth. The platform continues to evolve as Osu adds new plans, features, and use cases.

Deliverables

Mobile app

The mobile app allows sole traders to create and resend payment requests, track payments, send reminders, and issue invoices in one place. It includes built-in CRM with contact import, scan-to-pay, secure Face ID and fingerprint login, plan-based limits, automated emails, notifications, and in-app support via Intercom.

Payment widget

We built a lightweight payment widget with a Pay with Osu button that guides customers through payment summary, bank selection, and secure payment processing. The widget is easy to embed and supports open-banking flows.

Marketing

Our team supported Osu during the go-to-market phase. We designed and developed landings, website pages, and marketing materials aligned with the product’s payment flows. This allowed the client to present the service clearly, explain open-banking value to sole traders, and launch without waiting on additional vendors.

Administration web app

An administration web app lets merchants manage clients, payment requests, transactions, users, and roles from a single interface. The system supports referral programs, widget branding customization, automated emails for all actions, and secure access with login, registration, and two-factor authentication.

Billing portal

Users can view pricing plans, track billing history, and manage their account access in the billing portal. This gave Osu a clear subscription flow and reduced support load around payments and plan changes.

Results

  • MVP delivered in 2 months, so Osu launched its open-banking payment service on schedule.
  • We delivered one connected system that combines the mobile app, payment widget, admin panel, and billing portal instead of fragmented tools.
  • Reduced manual admin work, as client management, invoicing, payments, and referrals moved into one system.
  • Compliant access across the product, with Face ID, fingerprint login, and two-factor authentication.
  • Our team supports ongoing product growth because the app continuously extends with new features and plans.

Technologies we used

react
React
react
React Native

Project Team

Oleksandra
Software Developer
Vadym A
Vadym
Software Developer
Olesia
Project manager
Yevhen Piotrovskyi
Yevhen
co-Founder
Sonya Vasylyuk
Sonya
QA Engineer

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