About Me

As a mobile application developer and experienced independent professional with 11 years of experience, I have dedicated my career to mastering the most advanced technologies in the field of application development. My focus is on Android, iOS, and Windows, with a particular emphasis on creating applications that not only meet user needs but also provide an exceptional user experience.

My expertise is not limited to frontend; I am deeply skilled in backend, employing cutting-edge technologies such as Google Cloud, App Engine, and Compute Engine to build robust and scalable infrastructures. These skills allow me not only to develop applications that operate smoothly but also to ensure their scalability and security in the long term.

Moreover, I have significant experience working with virtual machines and AWS, which enables me to create and manage highly efficient development and production environments. This experience is crucial to ensuring that the applications I develop are reliable and capable of adapting to changing market demands.

Regarding data management, I possess extensive knowledge in both NoSQL and MySQL databases. This expertise allows me to design and implement data storage solutions that are both efficient and secure, ensuring that the integrity and performance of the application are never compromised.

Skills

BackEnd:

Node.js: Advanced - Development of efficient and scalable servers.

Express.js: Advanced - Framework for web applications and APIs in Node.js.

Python (Django/Flask): Intermediate - Robust and scalable backend for mobile applications.

Java (Spring Boot): Intermediate - Microservices and secure APIs for mobile.

Ruby on Rails: Basic - Rapid development of backend web applications.

Go (Gin/Gorm): Basic - High-performance backend with Go.

API RESTful and GraphQL: Advanced - Design and implementation of modern APIs.

Firebase (Auth, Realtime Database, Firestore): Advanced - Serverless backend and real-time database.

AWS (Lambda, EC2, S3): Intermediate - Scalable and secure cloud services.

Google Cloud (App Engine, Compute Engine): Advanced - Infrastructure and cloud services for high-performance applications.

FrontEnd:

HTML5: Advanced - Expert use in hybrid mobile application structures.

CSS3: Advanced - Responsive design and animations for mobile interfaces.

SASS/SCSS: Intermediate - Enhancement of CSS styles with advanced functionalities.

JavaScript (ES6+): Advanced - Implementation of complex logics and asynchrony.

TypeScript: Advanced - Strong typing for more robust application development.

React Native: Advanced - Development of cross-platform native applications.

Flutter: Advanced - Creation of high-performance native UIs for iOS and Android.

SwiftUI (iOS): Advanced - Modern and declarative interfaces for iOS.

Kotlin (Android): Advanced - Efficient and modern native applications for Android.

Xamarin: Basic - Cross-platform development based on .NET and C#.

DataBase:

SQL (MySQL, PostgreSQL): Advanced - Design and optimization of relational databases.

NoSQL (MongoDB, Firestore): Advanced - Flexible databases for modern applications.

SQLite: Advanced - Efficient local storage for mobile applications.

Redis: Intermediate - In-memory storage for caching and session management.

ORMs (Sequelize, Mongoose): Advanced - Database abstraction for efficient development.

Experience in iOS

In the realm of iOS, my experience encompasses the use of Swift and Objective-C, along with essential tools such as Xcode and the latest features of the iOS SDK. I have developed applications that leverage key iOS technologies like Core Data, Core Animation, and SiriKit, ensuring that the applications are interactive, visually appealing, and fully utilize the capabilities of Apple's hardware. My focus in designing and developing applications for iOS is centered on optimizing performance, security, and seamless integration with the Apple ecosystem.

Experience in Android

In my career as a mobile application developer, I have accumulated significant experience in the Android ecosystem. I have worked with a wide range of Android technologies, including Android Studio, Kotlin, and Java, as well as with Android APIs for different versions of the operating system. My experience extends from the design of intuitive and attractive user interfaces to the implementation of complex functionalities optimized for performance. I have closely collaborated with designers and QA teams to ensure that each application not only meets functional requirements but also provides a smooth and enjoyable user experience.

Mobile

Services

Android/iOS Native Apps: Specialization in native development for an integrated and fluid user experience.

Multiparadigm Solutions: Adaptability in programming styles for customized solutions.

Mobile UI/UX: User-centered, functional, and attractive mobile designs.

Optimized Databases: Efficient and fast data structures for mobile applications.

Cross-Platform Apps: Development with Flutter and React Native to reach a wide market coverage.

Backend and Cloud: Powerful and scalable backend solutions with cloud service integration.

Desktop

Native Development: Creation of native applications for Android and iOS using Kotlin and Swift, ensuring performance and complete integration with each platform.

Multiparadigm Development: Implementation of software solutions using various programming paradigms for robust and scalable applications.

Graphic Interface Design: Design of intuitive and attractive UI/UX, with advanced tools for an exceptional user experience.

Database Design: Development of database structures, both SQL and NoSQL, optimized for performance and scalability.

Hybrid and Cross-Platform Application Development: Use of Flutter and React Native for high-quality applications on multiple platforms.

Backend and Cloud Services Integration: Implementation of backend solutions with Node.js, Python, Java, and cloud services like AWS, Google Cloud, and Firebase.

Visual Portfolio: A Glimpse into My Creations

Out of respect for the privacy and confidentiality of my clients, this portfolio does not include names or direct details of the applications developed. Each image is a representation of my skill and dedication, always maintaining discretion and professionalism towards those who trust in my work

Contact Me

David Julian C.

Whatsapp: +57 3127523007 / +1 6029222296

Email: lecom0328@gmail.com