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Iβm Franklin Castillo, a Java Backend and Full-Stack Developer driven by a passion for building scalable, efficient, and secure applications. With hands-on experience in Java, Spring Boot, and React, I specialize in designing end-to-end solutions that combine strong backend performance with seamless user experiences. My expertise covers microservices architecture, RESTful and GraphQL APIs, cloud deployment, and database management, enabling reliable and high-performing enterprise systems.
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Whether youβre modernizing legacy systems, developing new platforms, or scaling microservices, I bring technical expertise, problem-solving skills, and a results-oriented mindset to every project. I collaborate closely with cross-functional teams to align technology with business goals β ensuring every solution is efficient, secure, and user-focused.
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β Java, Spring Boot, Kotlin, RESTful & GraphQL APIs
β Front-End Development with React, TypeScript, Redux
β Microservices Architecture, Docker, Kubernetes
β Cloud Platforms: AWS, Azure | CI/CD with Jenkins & GitHub Actions
β Database Management: SQL, NoSQL, MongoDB, Firebase
β Automated Testing: JUnit, Mockito, Jest, Testing Library
β Performance Optimization, Security, and DevOps Best Practices
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πΉ Proven track record delivering high-performance applications in enterprise environments
πΉ Skilled in optimizing architectures for speed, scalability, and reliability
πΉ Committed to clean, maintainable, and testable code
πΉ Experienced with Agile and DevOps methodologies
πΉ Lifelong learner who thrives on innovation and emerging technologies
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If youβre seeking a developer who combines technical depth with collaboration and a passion for excellence, letβs connect. Iβm open to new opportunities, partnerships, and conversations about building cutting-edge software solutions.
π© Letβs build something great together! More... View profile I am an IT architect, senior software engineer, and solution architect with many years of experience in system design, domain modeling, and leading complex technology projects. I have worked across telecommunications, finance, healthcare, e-commerce, and IT services, combining technical expertise with a systemic and process-oriented approach.
Alongside my IT career, I develop an independent vlog and video projects focused on cities, architecture, tourism, gentrification, identity, and social change. My work combines technological experience with research, curatorial, and artistic practice, creating visual essays based on observation, analysis, and a critical view of contemporary life. More... View profile