Carlos Calero

I’m a IT Developer with over 10 years of professional experience in building and testing mobile apps, backend APIs, and web solutions. My background covers the full development cycle, from idea to deployment.

On the mobile side, I’ve built and maintained over 10 Android applications using Kotlin and Java. I have solid experience with Android SDK, Jetpack Compose, MVVM, REST APIs, BLE, Firebase, and local storage. I enjoy creating intuitive user interfaces and reliable app behavior.

In backend development, I’ve worked mainly with Java Spring Boot, building RESTful services, microservices, and secure authentication flows. I’ve used MySQL, MongoDB, Redis, and Docker in production environments.

I have a strong foundation in testing and QA. I’ve led testing teams, created automation strategies, and used tools like JUnit, Mockito, Espresso, and Selenium to ensure high-quality releases.

I’ve also worked with Flutter for cross-platform apps and managed several WordPress-based projects, including custom themes, WooCommerce setups, and third-party integrations. I’m comfortable using Elementor and writing custom PHP when needed to meet client needs.

What sets me apart is my adaptability, organization, and clear communication. I’ve worked with international teams across time zones and handled both technical and functional roles. I’m fluent in Spanish and English, and I approach every task with attention to detail and a solution-oriented mindset.