Roland Kosemani Joshua

Developed and launched sales pages, a comprehensive website, and a certification verification portal using Next.js and MongoDB, boosting course purchases by 70% and achieving over $4,000 in annual third-party service cost savings.

Managed and optimized front-end assets with SanityCMS, reducing overall page bundle size by 50% and improving SEO performance, which led to a 25% increase in organic search traffic.

Designed and built an event photo and video collection web application with Next.js, reducing professional photography costs by 10% for event planners and hosts, while elevating brand rating by 20%.

Wrote and maintained robust unit and integration tests using Vitest, improving early error detection by 80% and reducing production errors by 90%.

Led a team of four developers on a high-impact project, coordinating sprints and peer code reviews to achieve a 22% faster development cycle.

Collaborated with product and design teams to develop a skincare brand web app, improving customer retention and user experience by 40% and boosting monthly revenue by 30%.

Optimized website flow and navigation menus, reducing misdirected customer service queries by 70% and increasing traffic to critical pages.

Built a user waitlist and contact page for a music distribution startup using Next.js and MongoDB, resulting in a 25% boost in user engagement within three months and a 20% increase in sign-ups.

Increased application load speed by 43% through advanced code splitting, lazy loading, and optimized asset delivery, enhancing user retention and engagement by 27%.

Integrated real-time performance tracking tools like Lighthouse and Web Vitals, achieving a 40% reduction in load times and significantly improving Core Web Vitals scores.

Collaborated to establish robust testing protocols for Vuetify components, boosting task delivery speed by 20% and improving API integration, performance, and stability.

Researched and implemented software development principles to enhance developer experience, reducing compilation times by 20% and increasing overall efficiency by 15%.

Designed and executed over 50 automated test cases using Jest, reducing production bugs by 47% and ensuring seamless feature rollouts.

Crafted custom semantic HTML elements for componentized forms, contributing to a 30% enhancement in overall developer experience.

Optimized complex Vue.js components, reducing rendering times by 35% and significantly enhancing application performance under high user loads.

Implemented Git for version control, improving code management and team collaboration, leading to a 25% improvement in development workflow efficiency.