Oluwatosin Kazeem
PRODUCT DESIGNER
PORTFOLIO '26
I design digital products and build them. From user research to production-ready code, I work across the full stack of product development. My work has helped startups raise over $200K in funding, get into accelerator programs, and launch faster.
Based in the Netherlands
Work
2024-2025
SpendFigo is a stablecoin spending platform built around one idea: making crypto payments feel as natural as spending regular money.
2023-2024
CollectAfrica was a fintech platform designed for Nigerian businesses of all sizes. It gave businesses a way to create payment links, manage customer contacts, handle transfers both locally and internationally, manage inventory, and control team permissions, all in one place.
2025
ClaraWave is a multi-sided platform built for the US home care and disability support market, connecting three groups through one connected system.
2020-2024
PHPSandbox is a web-based code editor where PHP developers can write, run, and share code directly in the browser. No local setup, no dependencies, no configuration headaches. Just open a browser and start coding.
2020-2024
Sandbox is the design system behind PHPSandbox, a scalable foundation that unified an engineering-led product and set the visual language for a growing ecosystem of developer tools.
2021-2022
SendpackAfrica is a delivery platform designed to solve how businesses and individuals send and receive packages across Africa.
2026
LockedIn is a focus-first reading app that streams your own books one word, sentence, or line at a time, with three reading modes, smart timing, and a personal library, built to help readers actually finish.
2025-2026
Pamoja is an AI-powered career platform built around a persistent professional Memory, helping people present the best version of themselves whenever opportunity arrives.
WRITINGS
View all writingsMY STRENGTH
I specialize in three things:
Research & Design
I conduct user research, usability testing, and design end-to-end product experiences from wireframes to high-fidelity prototypes.
Design Engineering
I translate Figma designs into pixel-perfect, production-ready components and build scalable design systems with consistent tokens.
Design Systems
I build and maintain scalable design systems with consistent tokens, reusable components, and clear documentation that keep products coherent as teams grow.
MY PROCESS
How it works
PROGRAMS & FUNDING
