All work

case study

DemmyPay

Designed the mobile experience for an airtime & data payments platform serving both consumers and high-volume vendors. Built a trust-first interface for fast, high-volume airtime and data purchases across Nigeria.

DemmyPay product screens
Timeline
1 to 3 months
Audience
B2B + B2C
Platform
Mobile
Role
Mobile App Design, Visual Identity, UX Research

Background

In the Nigerian airtime and data market, speed and trust are everything. DemmyPay needed to serve two very different audiences, everyday consumers making quick personal purchases and high-volume businesses reselling airtime and data, through a single platform. The challenge was building a product that felt simple and fast for individual users while offering the depth, pricing tools, and reliability that business vendors demanded at scale.

API Documentation
API Documentation

What needed to change

  • Designing a product that worked equally well for individual consumers and business users with fundamentally different needs and expectations.
  • Building trust at scale in a market where users are cautious about digital payment platforms and sensitive to any transaction failure.
  • Communicating speed, reliability, and business value clearly within seconds of a user landing on the platform.

The solution

I adopted a dual-audience, trust-first approach. In Figma, I designed a clean, modular mobile interface that supports both consumer purchase flows and business dashboards without overlap or confusion. Quick-action payment flows were prioritized for the consumer experience, while the business side got wallet management, vendor pricing logic, and transaction reporting tools.

The visual identity was refreshed to communicate reliability and professionalism, critical for building trust in a market where transaction failures and platform distrust are real concerns. I also designed a custom icon pack and developed the brand's design system to maintain consistency across all touchpoints.

Scope of work

  • B2B and B2C mobile app UI & UX
  • Brand Identity refresh (took a part)
  • Visual identity & design system design
  • Custom icon pack design
  • UX Research & wallet-based payment flows

The product

Mobile-first interface designs focused on quick-action payment flows.

Transaction History
Transaction History
Beneficiaries management
Beneficiaries management
Export Transactions
Export Transactions
Settings
Settings
Transaction History
Transaction History
Pin Setup
Pin Setup
Beneficiaries Selection
Beneficiaries Selection
Share 'n' Sell Data Sharing
Share 'n' Sell Data Sharing
Bulk Contact Addition
Bulk Contact Addition
Manual Contact Addition
Manual Contact Addition

The outcome

DemmyPay became a scalable B2B and B2C fintech platform handling high volumes of airtime and data transactions. The dual-audience approach worked, individual consumers got a fast, intuitive experience for everyday purchases, while businesses gained reliable vendor tools for high-volume operations. The trust-first design strategy paid off in a market where credibility is earned one successful transaction at a time.

“DemmyPay works perfectly for both our personal use and our data business. It's fast, reliable, and easy to manage.”
Ayomide · Product Manager

Let's talk

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© 2026 Tife Olayinka · CreditsLagos, UTC+1 ·