Charles Okonkwo

Founding Full Stack Engineer - House Maduekwe

(2025-09 - 2026-07)

Designed and built a full-stack luxury men's fashion e-commerce platform from concept to production.
Architected and developed both frontend and backend systems using React, Vite, Node.js, Express.js, and MongoDB.
Built responsive and accessible user interfaces with Styled Components and Tailwind CSS.
Improved application performance through code splitting, lazy loading, caching, and frontend optimization techniques.
Designed reusable frontend components and shared application patterns to improve maintainability and development speed.
Built secure REST APIs, authentication, product management, checkout, order management, and customer account features.
Integrated Stripe for secure online payment processing.
Integrated Mailgun for transactional emails including order confirmations, verification emails, and notifications.
Implemented SEO improvements to increase search engine visibility and improve performance.
Designed the application's overall architecture, database structure, and business logic.
Managed deployment, server configuration, production monitoring, and ongoing maintenance.
Worked across product planning, feature design, and implementation from initial idea through production release.
Project: https://housemaduekwe.com

Senior Frontend Engineer - Konnadex & Konna, Nigeria

(2023-01 - 2024-10)

Built and enhanced scalable, responsive web applications using React.js, Next.js, TypeScript, Styled Components, CSS, and HTML.
Developed key frontend features for Konnadex, a Web3 cryptocurrency payment platform, building secure user and administrative dashboards for wallet management, cryptocurrency payment gateways, invoice generation, employee payment management, and other financial operations.
Led frontend development for Konna, a modern point-of-sale (POS) platform for retail businesses. Built and maintained the web application that also served as the foundation for the Electron-based desktop application, enabling inventory and stock management, sales processing, receipt and invoice generation, analytics, customer management, and cryptocurrency payment support.
Mentored a junior frontend developer on the Konna project through code reviews, technical guidance, and frontend best practices while helping maintain a high standard of code quality.
Contributed to application architecture, feature planning, deployment, maintenance, and continuous product improvements to deliver secure, scalable, and reliable software solutions.
Project: https://www.konnadex.com
Project: https://konna.io

Frontend Engineer - PrometaLab, Nigeria

(2022-09 - 2022-12)

Designed and implemented the frontend architecture for both the company website and the laboratory management platform using React.js, Styled Components, Tailwind CSS, HTML, and JavaScript (ES6+).
Built responsive, production-ready user interfaces for a laboratory management system, enabling laboratories to manage users, laboratory tests, test results, and other operational workflows through an intuitive web dashboard.
Worked closely with the product and backend teams to translate business requirements into scalable, maintainable frontend features and reusable components.
Managed application deployment and production maintenance on a VPS using GitHub Actions, ensuring reliable releases and efficient deployment workflows.
Project: https://www.prometalab.com

Front End Developer - Ogwugo, Nigeria

(2020-01 - 2022-08)

Developed and maintained customer-facing and merchant web interfaces for Ogwugo's food ordering and delivery platform using HTML, CSS, JavaScript, and React.
Contributed to backend development using PHP (Laravel) and SQL while gaining hands-on experience building production features across the full stack.
Worked closely with senior engineers and the product team to implement new features, improve existing functionality, and support the growth of a production food delivery platform.
Project: https://food.ogwugo.com
Project: https://courier.ogwugo.com

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