Collins Maduka

Led the development of a B2B/B2C marketplace platform for the construction industry, digitizing procurement workflows and enabling real-time quote comparison, shipment tracking, and invoice management. Architected a microservices-based backend using Node.js/Express.js, containerized with Docker and orchestrated via Kubernetes, reducing deployment failures by 40%.

Led backend development for a ride-hailing platform, focusing on driver operations and fleet management, integrating with third-party mapping and payment gateways. Built a Nest.js-based driver rostering microservice, reducing ride assignment latency by 25% through geospatial indexing and optimized matching algorithms.

Collaboratively led the development of a wealth management platform, enabling clients to track multi-asset portfolios and liabilities with real-time analytics, risk assessment, and automated tax reporting. Engineered a React.js/Next.js dashboard with D3.js visualizations for portfolio performance, increasing user engagement by 28%.

Transformed legacy booking and reservation systems into a robust, scalable, and modernized application for 8 airlines, aligning with IATA NDC standards. Replaced a legacy PHP monolith with a React.js/Node.js SPA, reducing booking page load times from 8s to 2s and improving conversion rates by 20%.

Led development of a SaaS POS system for retail chains, enabling real-time inventory tracking, multi-store sales analytics, and offline transaction sync. Reduced checkout time by 30% by optimizing MongoDB aggregation pipelines for real-time stock updates and sales tax calculations.

Developed a food delivery aggregator platform connecting restaurants with users, featuring real-time order tracking, loyalty programs, and AI-driven meal recommendations. Scaled the backend to improve daily orders handling using Node.js clustering and MongoDB sharding, ensuring 99.5% uptime during peak hours.

Developed a car rental platform enabling dynamic pricing and real-time GPS tracking. Eliminated double-booking errors by 90% using Hibernate optimistic locking and idempotent API design for reservation endpoints.

Partnered in leading the development of a live-streaming platform supporting 2M+ monthly viewers with real-time broadcasts, VOD, and ad monetization. Reduced mobile app crashes by 70% by refactoring Ionic/AngularJS code and introducing automated E2E testing with Protractor.

Completed a diploma program focused on Core Java Language, encompassing both J2EE and JSE. Gained foundational and advanced knowledge in Java programming and enterprise application development.

Pursued a Bachelor of Science & Engineering degree in Chemical Engineering. Acquired comprehensive knowledge in chemical processes, engineering principles, and problem-solving methodologies.