My Projects

Below are real-world applications I've designed and implemented. These projects showcase my ability to build scalable, secure, and enterprise-grade backend systems using Java, Spring Boot, and modern architectural practices.

• Wallet System – Consolidated Hallmark Insurance Plc (CHI)

  Architected and deployed a high-performance wallet service for CHI to manage digital transactions, account balances, and double-entry ledger updates. Designed with security, auditability, and third-party payment integrations in mind.

  Built microservices to support wallet funding, internal transfers, secure withdrawals, and automated financial reporting with end-to-end encryption and tokenized authentication.

  Technologies: Java (Spring Boot), PostgreSQL, JWT, Paystack API, Flutterwave API, Feign, Apache POI, iText, AES Encryption

  Key Contributions:

  • ⚙️ Developed a double-entry ledger system with reconciler logic.
  • 💳 Integrated Paystack/Flutterwave payment and webhook flow for real-time top-ups.
  • 🔐 Enabled encrypted OTP & PIN validations for withdrawal authorization.
  • 📄 Exported trial balances and reports in PDF/Excel using iText and POI.
  • 🔁 Scheduled retry jobs for failed transactions and settlements.
  • 🛡️ Applied user-specific AES encryption across secure endpoints.
  • 📡 Coordinated microservice communication using secure Feign clients.

• Kibou Registry – Event Platform (Algomath / Moneta)

  Designed and implemented a modern event registry system that enables users to schedule, manage, and track events through a responsive web platform. Focused on modular backend services, role-based access, and automated lifecycle transitions.

  Technologies: Java (Spring Boot), PostgreSQL, React, JWT, REST APIs, Render, Postman

  Key Contributions:

  • 📆 Built a scheduling engine for time-triggered event flows and reminders.
  • 🧾 Created event registration, RSVP tracking, and guest view endpoints.
  • 🛠️ Deployed full-stack app on Render with CI/CD readiness.
  • 🔐 Implemented JWT security across user, admin, and guest modules.
  • 🧪 Covered endpoints with Postman collections and test scenarios.

• Quickbite Restaurant Platform

  Built a full-stack restaurant management and ordering platform supporting multi-restaurant registration, menu uploads, and customer order tracking. Includes separate role flows for admin, staff, and customers.

  Technologies: Java, PostgreSQL, React, SQL, JWT

  Key Contributions:

  • 🔐 Set up JWT auth and role-based access for admin and restaurant staff.
  • 📦 Designed product/menu CRUD APIs with pagination and filtering.
  • 🛒 Enabled real-time order flow and order tracking components.
  • 📊 Delivered responsive frontend in React for mobile and desktop users.

• Job Board System

  Developed a secure and intuitive job board platform for employers to post roles and manage applications, while allowing job seekers to search, filter, and apply to jobs.

  Technologies: Java, PostgreSQL, JavaScript, JWT

  Key Contributions:

  • 🔐 Built secure login flows with JWT and user-role separation.
  • 🧾 Delivered CRUD features for job listings, employer profiles, and applications.
  • 🔍 Implemented keyword/category search with smart filters.
  • 📈 Created job application tracking dashboards for employers.

• Inventory Management Platform

  Backend system designed for product inventory control, order placement, and stock deduction. Built to handle high concurrency and track seller-buyer activity across multiple channels.

  Technologies: Java, PostgreSQL, JavaScript, JWT

  Key Contributions:

  • 🔐 Developed secure APIs with encrypted auth for product access and transactions.
  • 📦 Managed stock movement and quantity sync using transactional queries.
  • 🛒 Enabled real-time ordering and seller-controlled product visibility.