html Onyekachi Jeremiah - Frontend Developer
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Frontend Developer & Builder

Onyekachi Jeremiah.

I build interfaces that perform clean, fast, and purposeful. From e-commerce platforms to IoT dashboards, every pixel serves a reason.

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About
OJ

I'm Onyekachi Jeremiah, a Frontend Developer based in Lagos. I design and build digital products that balance aesthetic clarity with technical depth.

My work spans AI integrations and workaround, e-commerce systems, logistics platforms, IoT interfaces, and financial dashboards, always with a focus on mobile and desktop performance and seamless user experience.

I care about the details: load times, micro-interactions, API reliability, and the moment a user finds exactly what they need without friction.

AI integration
HTML / CSS / JS
PHP
API Integration
UI/UX & Figma
Auth Systems

Good frontend is invisible users never notice it, they just feel it working.

⬡
Interface Design
Clean, purposeful UI built mobile-first, accessibility-aware, and pixel-precise.
⤢
E-commerce Builds
Full checkout flows, product galleries, and vendor dashboards with payment & logistics APIs.
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API Integration
Shipbubble, PayStack, Google Auth, JWT — connecting frontend to backend reliably.
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Data & Dashboards
Analytics interfaces, real-time charts, and reporting tools for logistics and fintech.
Selected work
01
Clothing & Lifestyle · E-commerce
MAMAG STORE
A high-end clothing e-commerce platform built for scale. Custom PHP backend, advanced image gallery with modern effects and experience, and sophisticated cache-busting scripts for instant UI updates. API integration for quick payment checkout.
PHPMySQL Paystack API Image GalleryCache Optimization
Live Site → Want Something Similar ? →
02
AI FINTECH · Mobile and Desktop
Cogitto AI Banking
A sophisticated financial interface bridging the gap between physical hardware and digital intelligence through the Home Banking Device (HBD). This platform merges high-frequency ambient banking with secure, localized processing for a seamless user experience.
Javascript Auth Google Login Mobile-FirstSocial UI
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03
Online Courses & Education Chain
PDFarms Online Study
A specialized educational marketplace and gamified acquisition system. Real-time ticket allocation and automated raffle entry generation upon course enrollment. Complex backend logic managing multi-tier reward pools, secure drawing algorithms, and user entitlement state across the full learning lifecycle.
Javascript Multi-carrier API State Management Label GenerationReal-Time
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01
Hardware & Digital Billboard
NeoScreens
A high-performance digital-out-of-home (DOOH) interface for real-time billboard orchestration and asset management. Features a dynamic inventory dashboard with a Javascriptive geographic visualization engine that changes state based on live ad performance and screen health.
PHPMySQL Multi-carrier API Image GalleryCache Optimization
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05
Fintech & Online, Electricity Payment
PowerUp
A real-time energy and fintech dashboard. Seamless prepaid and postpaid loading via the dashboard and live balance tracking without hardware, integrated with money transfers and detailed utility analytics for clear consumption insights.
JavaScript Data Visualization Real-Time Charts Fintech UISME
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06
IOT & Automation · Smart Home
Vera
A futuristic smart home command center. An AI-integrated IoT dashboard featuring minimalist controls for real-time device automation and voice-responsive interfaces, optimized for seamless connectivity and low-latency performance.
HTML / CSS / JS / PHP ... Conversion-Optimized Mobile-First Lagos Market
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07
Food & Lifestyle ·
MAMATEESAUCES
A premium culinary e-commerce platform for Mamatee Sauces. Custom PHP backend featuring high-resolution product galleries, instant UI updates via advanced cache-busting scripts, and a streamlined API integration for a fast, secure checkout experience.
JS / TAILWINDCSSMySQL Paystack API Image GalleryCache Optimization
Live Site → Want Something Similar ? →
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More work
Other Projects
Additional client work, experiments, and builds. Some are under NDA. Reach out directly to discuss scope and timeline.
Get in touch →
On request
Contact

Let's build something worth using.

Open to freelance, contract, and full-time roles. Whether you need a frontend built from scratch or an existing product improved — let's talk.

jeremiahluis4life@gmail.com
WhatsApp↗ LinkedIn↗ Gmail↗
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