Fullstack Developer · Lagos, Nigeria

Hi, I'm David Omiunu

Freelance web developer building scalable websites and web applications with Next.js, Express.js, and MongoDB. Focused on performance, clean architecture, and user-friendly interfaces.

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About

Background

I am a fullstack developer based in Lagos, Nigeria, with experience building scalable websites and web applications using Next.js, Express.js, and MongoDB. I have worked on production-level systems including invoicing platforms, CRM tools, and management systems.

As a freelance web developer, I focus on performance optimization, clean architecture, and user-friendly interfaces. Every project I take on is an opportunity to deliver reliable, well-crafted software.

Tech Stack

Frontend

Next.jsReactTypeScriptTailwind CSSFramer MotionStyled Components

Backend

Node.jsExpress.jsTypeScriptREST APIsJWT Authentication

DevOps & Tools

DockerGitJestPostman

Database

MongoDBMongooseRedisFirebasePostgreSQLMySQLSQLite

Work

Selected Projects

A few things I've built — from invoicing platforms to church management systems and corporate tools.

AutobillHQ

A fullstack invoicing platform for managing invoices, receipts, and quotations. Built with a scalable backend architecture and a clean dashboard UI.

  • Invoice and receipt generation
  • Quotation management
  • Clean dashboard UI
  • Containerized with Docker
Next.jsExpress.jsMongoDBDocker
Visit Live Site

Gathrik

A church management system focused on building responsive UI and improving user experience.

  • Responsive and accessible interface
  • Member and event management
  • Optimized user experience
Next.jsReactTypeScript
Visit Live Site

KloverHarris Website & CRM

Built both the marketing website and internal CRM system with admin dashboard and data management capabilities.

  • Admin dashboard
  • Data management system
  • Performance optimization improvements
  • Marketing website
Next.jsExpress.jsReactMongoDB
Visit Live Site

Experience

Where I've Worked

Fullstack Developer

KloverHarris Limited

Present

Leading the development of internal tools and client-facing web applications. Building and maintaining the company CRM, marketing website, and admin dashboards using Next.js, Express.js, and MongoDB.

  • Built and deployed the company website and internal CRM system
  • Managed IT infrastructure and development operations
  • Optimized application performance and user experience
  • Collaborated with cross-functional teams on digital transformation initiatives

Fullstack Developer

Fragment Solutions

Apr 2023 — Sep 2025

Developed and maintained full-stack web applications, collaborating with teams to deliver scalable solutions for clients using modern web technologies.

  • Built and shipped client-facing web applications using modern frameworks
  • Collaborated with designers and product teams to deliver features end-to-end
  • Implemented RESTful APIs and integrated third-party services
  • Participated in code reviews and maintained high code quality standards

Writing

Latest Writing

View all

Practical notes on websites, pricing, and growing a business online — written for founders and business owners in Nigeria.

What Is Web Hosting, and What Should You Pay in Nigeria?

A plain-English guide to web hosting, domains, and SSL for Nigerian businesses, with realistic Naira costs so you don't get overcharged.

Read

Paystack vs Flutterwave: Picking a Payment Gateway for Your Website

An honest comparison of Paystack and Flutterwave for Nigerian businesses, covering fees, payouts, payment methods, and which one to actually pick.

Read

How to Write Website Content That Actually Converts

Most business websites lose customers because the words are confusing. Here's how to write copy that turns Nigerian visitors into real enquiries.

Read

Contact

Get in Touch

Have a project in mind or want to collaborate? Send me a message.

enquiries@omiunudavid.com