I am a results-driven Full Stack Web Developer with over 5 years of experience building scalable web applications and leading digital transformation initiatives across international markets. My expertise spans the complete technology stack, from crafting responsive user interfaces with React, Angular, and Vue.js to architecting robust backend systems using Node.js, Django, and microservices architecture. At Safaricom PLC, I spearheaded the development of the M-PESA Business mobile application, delivering a 43% increase in business transactions while optimizing system performance through strategic database management and CI/CD pipeline implementation. My capabilities extend beyond traditional web development into emerging technologies, including IoT integration for healthcare systems, real-time communication platforms using WebRTC, and cloud-native solutions across AWS, GCP, and Azure. With a strong foundation in computer science and hands-on experience with hardware integration through telemedicine projects, I'm well-positioned to bridge the gap between web development and robotic programming, particularly in areas requiring real-time data processing, sensor integration, and automated system control. I bring a unique combination of technical excellence, international perspective from my Brazilian background, and deep understanding of the African tech ecosystem, making me ideal for organizations seeking innovative solutions that scale globally while addressing local market needs. You can explore my work and projects at https://dennis2545.github.io/portfolio/ to see how I transform complex technical challenges into user-friendly, high-performance applications.