Stephen Adeniji
Frontend engineer building fast, well-made interfaces for web and mobile.
Two years in, shipping production work with Next.js, React Native, and TypeScript. Chrome extensions when the right itch shows up.
About
I've spent the last two years building interfaces that ship — for fintechs, dealerships, edtech platforms, and a handful of solo products of my own. My focus is the part of the stack where design meets engineering: animations that feel right, forms that don't frustrate, and code that the next engineer can read.
On the web I work in Next.js and TypeScript. On mobile I reach for React Native and Expo. I've also shipped Chrome extensions, and I'm comfortable enough on the backend to wire up an API when a project needs one.
Stack
Selected work
4 of 5Privvy Ledger
mobilePrivacy-first expense tracker. No account, no cloud, no ads — just a fast offline ledger.
2025React Native · ExpoLloyd Autos
webCar dealership platform with full inventory management, filters, and a Sanity-powered CMS.
2025Next.js · SanityEzzymeans
webLoan platform for salary earners offering quick access to funds at affordable rates.
2025Next.js · TypeScriptNomad Fitness
webLanding page with onboarding and payment flow for an AI-powered fitness app.
2025Next.js · TypeScript
Experience
Dec 2024 — Present
Frontend Engineer · Freelance
Building web and mobile products for small businesses and product teams. End-to-end ownership from setup through deployment.
Feb — Jun 2025
Frontend Engineer · Optisage
Built Optisage.ai with Next.js and TypeScript. Worked closely with design, backend, and product to ship features in an agile environment.
Nov 2024 — Apr 2025
Frontend Engineer · Cosonas
Built responsive web and mobile applications using Next.js and React Native for client projects across industries.
Aug 2023 — Sep 2024
Frontend Engineer · Voltwolf
Built and maintained user and admin dashboards for fintech products. Shipped features aligned with product goals and business needs.
Contact
Have a project, role, or rough idea you want to talk through? The fastest way to reach me: