Freelancer profile translated to English.
Back to original languageAbout Alejandro
Senior Android Developer | DevSecOps & Cybersecurity Specialist
Software Developer with over 4 years of technical experience, specializing in building native Android applications and securing critical infrastructures. My approach combines high-performance development with a Security by Design mindset.
I have worked for major clients (Vodafone, Iberdrola, Eulen) implementing Clean Architecture and MVVM architectures in mobile applications and reducing delivery times through CI/CD pipeline automation (Jenkins/Gradle).
What do I bring to your project?
- Mobile Development: Expert in Kotlin, Java, and Jetpack Compose. Proficient in dependency injection (Dagger Hilt), persistence (Room), and REST API consumption (Retrofit).
- Defensive and Offensive Security: Advanced training in Ethical Hacking, eJPT certification (in progress), and specialist in Vehicle Cybersecurity. Expert in Linux system hardening and vulnerability analysis.
- Cloud & Infrastructure (DevSecOps): Certified specialist in Microsoft Azure, Kubernetes, Docker, and network administration (CCNA). Ability to deploy and monitor scalable and secure environments.
- Automation: Development of proprietary tools in Python and Bash Scripting for triaging, log analysis, and web scraping.
My goal is to help companies not only launch functional products but to build resilient, secure, and automated software.
Spanish
Native or bilingual
English
Conversational
Can work on-site
Cádiz (up to 50km)
Experience
- Alten Spain,Android DeveloperTELECOMMUNICATIONSMarch 2023 - April 2025 (2 years and 1 month)Seville, SpainDevelopment and maintenance of native Android applications using Kotlin and Java for highly relevant clients such as Vodafone, Iberdrola, Eulen, and Clarel. I was responsible for implementing modern user interfaces using Jetpack Compose and XML to improve the fluidity of the user experience.I designed and structured the code under Clean Architecture and MVVM and MVP design patterns to ensure software scalability and maintainability. I also managed data persistence and communication with external services using Room, Retrofit, Coroutines, and Dagger Hilt for dependency injection.In addition to development tasks, I automated continuous integration and deployment workflows using Jenkins and Gradle to optimize delivery times. I also ensured application robustness by executing unit tests with JUnit and version control in Gitlab.
- ISG surOffice Worker, Administrative, AccountantRETAIL (LARGE RETAILERS)June 2021 - March 2023 (1 year and 9 months)Chiclana de la Frontera, SpainDigital transformation and optimization of the company's operational processes. My main role consisted of transitioning from manual records to digital systems, which improved data integrity and efficiency in information management.I was responsible for managing critical assets and inventories using advanced data analysis tools. Additionally, I managed documentary repositories and access controls in SharePoint environments, ensuring a methodical and secure organization of the company's technical and administrative documentation. I also managed incidents and maintained direct communication with suppliers to resolve queries and track internal processes.
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Education
- Higher Technician in Cross-Platform Application DevelopmentCES Juan Pablo Segundo2023
- Vehicle Cybersecurity (240h) Vulnerabilities in connected systemsIFCD1012026Ciberseguridad para Vehículos (240h) Vulnerabilidades en sistemas conectados
Certifications
- Vehicle Cybersecurity (IFCD101)Junta de Andalucía2026
- Fundamentals of Cybersecurity Professional CertificateMicrosoft2026