Johnson Obioma

Architected and maintained two enterprise-grade platforms: a multi-tenant ERP system and a real-time event ticketing system using .NET and Angular, achieving consistent sub-300ms API response times. Designed and deployed RESTful APIs in a microservices architecture, with Docker containerization and service orchestration for modular scalability. Built CI/CD pipelines with GitHub Actions, enabling 60% faster deployment cycles and reducing manual errors. Integrated AWS Lambda for asynchronous ticketing workflows and ERP automation tasks, enabling event-driven backend processing. Led a cross-functional team across both projects, ensuring clean architecture, SOLID principles, and 90% automated test coverage using NUnit and Postman

Built and maintained a responsive React web app and cross-platform React Native mobile app backed by ASP.NET Core Web APIs, serving 5,000+ monthly users at 99.5% uptime. Implemented a Backend-for-Frontend (BFF) pattern to provide tailored, optimized API endpoints for web and mobile clients, improving client-side performance by 80%. Modernized legacy systems to microservices architecture, deployed on Azure App Service, improving deployment frequency from monthly to bi-weekly. Achieved 80% Jest test coverage across UI components and 85% NUnit coverage on backend, cutting defect rate by 30%.

Developed SaaS applications for enterprise clients using Angular (TypeScript, RxJS, NgRx) and .NET Core. Applied Repository and Dependency Injection patterns to enforce clean architecture, reducing coupling, improving maintainability, and reduced development time by 30%. Optimized SQL database performance through indexing strategies, query tuning, and implemented caching with Redis, improving response times by 25%. Communicated complex technical solutions to cross-functional stakeholders, enhancing overall project transparency and workflow efficiency.