Hi, I’m Rubén Espinosa González, a Full-Stack Developer specialized in .NET and modern front-end technologies such as JavaScript, React, and Angular. I freelance developing, maintaining, and providing support for a .NET 4.8 application used by major companies. In my free time, I also develop mobile apps and video games, combining my passion for technology with creativity and problem-solving. I currently work part-time as a Chemist in the perfumery, food, and pharmaceutical industries, a role that strengthens my analytical and research skills. My goal is to fully focus on software development, contribute to meaningful projects, and continue growing as a developer.

Rubén Espinosa González

Hi, I’m Rubén Espinosa González, a Full-Stack Developer specialized in .NET and modern front-end technologies such as JavaScript, React, and Angular. I freelance developing, maintaining, and providing support for a .NET 4.8 application used by major companies. In my free time, I also develop mobile apps and video games, combining my passion for technology with creativity and problem-solving. I currently work part-time as a Chemist in the perfumery, food, and pharmaceutical industries, a role that strengthens my analytical and research skills. My goal is to fully focus on software development, contribute to meaningful projects, and continue growing as a developer.

Available to hire

Hi, I’m Rubén Espinosa González, a Full-Stack Developer specialized in .NET and modern front-end technologies such as JavaScript, React, and Angular. I freelance developing, maintaining, and providing support for a .NET 4.8 application used by major companies. In my free time, I also develop mobile apps and video games, combining my passion for technology with creativity and problem-solving.

I currently work part-time as a Chemist in the perfumery, food, and pharmaceutical industries, a role that strengthens my analytical and research skills. My goal is to fully focus on software development, contribute to meaningful projects, and continue growing as a developer.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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Language

Spanish; Castilian
Fluent
English
Advanced

Work Experience

Full-Stack Developer at Sonkeit (Siac App)
January 1, 2025 - November 6, 2025
Expansion and improvement of the Siac app functionalities. Database management and maintenance to ensure stability and performance. Enhancement of user experience through UI/UX improvements. Technical support for clients and internal teams. Performance optimization and bug fixing to improve overall reliability. Contribution to the app’s continuous development and scalability.
Android & Video Game Developer (Freelance) at Freelance
January 1, 2023 - November 6, 2025
Development and publication of WeekEat, an Android Food Planning App. Development and launch of mobile video games in Unity (C#) with custom mechanics and performance optimization. 3D asset design and modeling using Blender, Substance Painter, and Photoshop. Implementation of game logic following SOLID principles for clean and scalable code. Version control management with Git and development under agile methodologies.
Analytical Development Chemist at Destilaciones Bordas
January 1, 2016 - November 6, 2025
Development of analytical methods for the perfumery, food, and pharmaceutical industries. Sample analysis using spectrometry and chromatography equipment. Collaboration on research projects with a team of five, following agile methodologies.

Education

Degree in Chemistry at University of Seville
January 11, 2030 - January 1, 2010
Degree in Computer Engineering at University of Valencia
January 1, 2023 - November 6, 2025
Bootcamp Front-End Developer (Angular) at UNIR / Qualentum
January 1, 2024 - January 1, 2024

Qualifications

Unity - Video Game Design & Development
January 1, 2023 - November 6, 2025
Meta - Front-End Developer
January 1, 2022 - November 6, 2025
Bootcamp Front-End Developer (Angular)
January 1, 2024 - January 1, 2024

Industry Experience

Software & Internet, Professional Services, Computers & Electronics, Manufacturing