Esteven De Leon

Software developer with over 11 years of experience designing and developing software across multiple programming languages, primarily .NET C#. Experienced in SQL database implementation, software debugging, troubleshooting, quality assurance testing, and technical documentation. Strong analytical and problem-solving skills for identifying and solving complex problems through efficient technological solutions.

Committed and passionate about continuous learning, research, and process improvement, with the ability to quickly adapt to new technologies and work environments.

Mobile App Developer at Independent App Developer (2022-05 – 2026-03)

• Mobile apps development using Flutter, including design, implementation, testing, and maintenance.
• Integration of local SQLite databases for data storage and management.
• Implementation of asynchronous programming techniques for efficient data processing.
• Publishing in Google Play Store.
• Web apps deploy using Firebase.
• Use of Flutter WebView component and run of JavaScript code within apps.

Software Developer at Upwork Platform (2021-05 – 2026-03)

• Desktop applications development and maintenance using C# and WPF, applying the MVVM architecture and WPF components.
• Integration of multiple database systems using Entity Framework.
• SQL databases design and optimization, including the development and performance tuning of Stored Procedures.
• Source code management and version control using Git, Azure DevOps, and GitHub.
• Development and maintenance of ASP.NET and Blazor web applications, including the use of the Radzen Blazor framework and MudBlazor.
• REST APIs implementation into applications.
• Participation in JavaScript, TypeScript, React, PHP, Python and PowerShell projects, and Google Chrome extension development.

Software Developer at Trends (2020-03 – 2021-05)

• Desktop applications development and maintenance using C# and WPF, applying the MVVM architecture and reusable WPF components.
• MariaDB databases design, optimization and maintenance.
• Performed bug fixes and continuous improvements to existing application features.

Software Developer at ARV System Corp (2015-10 – 2020-03)

• Enterprise applications development and maintenance using C#.NET, C++ with Qt Framework, and WinDev.
• Design and implementation of administrative management, inventory management, and point of sale (POS) systems.
• Development of software solutions for task management and internal communications.
• SQL databases design and optimization, including Stored Procedure development and optimization.
• Coordinated development team during various stages of software projects.
• Participated in all phases of the software development lifecycle.

Linux Technical Support & Software Tester at Grupo Advisers (2012-11 – 2015-10)

• Technical support for Linux operating systems.
• Intensive quality assurance testing and validation of Linux-based POS software.
• Data analysis to ensure system and database integrity.
• MySQL databases administration.
• Technical documentation creation for support staff and end users.
• Collaborated with internal and external teams to resolve issues and implement new technologies and software solutions.

Graphic Designer at Fotocolors Win (2010-03 – 2012-11)

• Design and edition of graphic designs using Adobe Photoshop.
• Creation and adaptation of graphic materials according to client requirements.

Bachelor's Degree in System Engineering – Universidad Interamericana de Panamá (2010 – 2016)

High School Diploma in Science with IT Specialization – Centro Educativo Stella Sierra (2007 – 2009)