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I am a Full Stack Java Developer with over 7 years of experience working across full stack development, microservices, and mobile applications. I have developed scalable, high-performance applications using technologies such as Java, Spring Boot, and cloud platforms like AWS and Docker. I am passionate about clean architecture, optimizing code, and building software that scales effectively. Throughout my career, I have volunteered and contributed to multiple impactful projects, including climate action initiatives and integrations for various industry platforms. Whether working on backend microservices or mobile apps, I enjoy embracing agile methodologies and continuous learning to deliver user-friendly and maintainable solutions.…I am a Full Stack Java Developer with over 7 years of experience working across full stack development, microservices, and mobile applications. I have developed scalable, high-performance applications using technologies such as Java, Spring Boot, and cloud platforms like AWS and Docker. I am passionate about clean architecture, optimizing code, and building software that scales effectively. Throughout my career, I have volunteered and contributed to multiple impactful projects, including climate action initiatives and integrations for various industry platforms. Whether working on backend microservices or mobile apps, I enjoy embracing agile methodologies and continuous learning to deliver user-friendly and maintainable solutions.

Jeremias Leonel Chaparro Bellier

Full Stack Developer, Back-End Developer, Cloud Developer, +1

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I am a Full Stack Java Developer with over 7 years of experience working across full stack development, microservices, and mobile applications. I have developed scalable, high-performance applications using technologies such as Java, Spring Boot, and cloud platforms like AWS and Docker. I am passionate about clean architecture, optimizing code, and building software that scales effectively. Throughout my career, I have volunteered and contributed to multiple impactful projects, including climate action initiatives and integrations for various industry platforms. Whether working on backend microservices or mobile apps, I enjoy embracing agile methodologies and continuous learning to deliver user-friendly and maintainable solutions.…I am a Full Stack Java Developer with over 7 years of experience working across full stack development, microservices, and mobile applications. I have developed scalable, high-performance applications using technologies such as Java, Spring Boot, and cloud platforms like AWS and Docker. I am passionate about clean architecture, optimizing code, and building software that scales effectively. Throughout my career, I have volunteered and contributed to multiple impactful projects, including climate action initiatives and integrations for various industry platforms. Whether working on backend microservices or mobile apps, I enjoy embracing agile methodologies and continuous learning to deliver user-friendly and maintainable solutions.

Available to hire

I am a Full Stack Java Developer with over 7 years of experience working across full stack development, microservices, and mobile applications. I have developed scalable, high-performance applications using technologies such as Java, Spring Boot, and cloud platforms like AWS and Docker. I am passionate about clean architecture, optimizing code, and building software that scales effectively.

Throughout my career, I have volunteered and contributed to multiple impactful projects, including climate action initiatives and integrations for various industry platforms. Whether working on backend microservices or mobile apps, I enjoy embracing agile methodologies and continuous learning to deliver user-friendly and maintainable solutions.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Portuguese

Advanced

English

Advanced

Spanish; Castilian

Fluent

German

Beginner

Work Experience

Back End Developer Volunteer at Zero Emission World

December 31, 2024 - August 27, 2025

Spearheaded development of proprietary software for NGOs focused on payment processing within a microservices architecture. Leveraged Java 17, Spring Boot, Docker, MongoDB, JUnit, and Kafka to build a robust backend supporting scalability and real-time data streams. Contributed to climate action initiatives by enabling NGOs to efficiently manage payment processes.

Mobile Developer at Impact Zero

December 31, 2023 - August 27, 2025

Developed and maintained the Travizco Android application using JavaScript, Flutter, and Dart. Established comprehensive test bases to ensure application reliability and performance optimization.

BackEnd Java Developer at Making Sense

July 31, 2022 - August 27, 2025

Integrated Royal Canin product into the VetSource platform to expand service offerings in the U.S. market. Designed and implemented a statistics dashboard using Datadog to monitor key system metrics. Used Java 8, Spring, Kafka, Vaadin, Hibernate, WebLogic, Kubernetes, Docker, Oracle DB, and BitBucket to improve system efficiency and scalability.

Full Stack Java Developer at Prosegur

April 30, 2022 - August 27, 2025

Developed and optimized microservices to enhance system performance and modularity. Migrated legacy monolithic modules to microservices, significantly reducing cross-team dependencies. Created new desktop and web screens improving workflow efficiency for operators. Used Java 8, Spring, JMS, Hibernate, WebLogic, Docker, OracleDB, JSF, JavaFX, EclipseLink, and BitBucket.

Full Stack Java Developer at Cognisys SRL

June 30, 2020 - August 27, 2025

Developed new features and optimized modules for municipal procedures pages improving performance and maintainability. Refactored monitoring modules enhancing debugging and feature extension. Led database migration and optimization projects indexing and transforming databases for better query performance. Developed responsive landing pages for real-time municipal status tracking. Technologies included Java 6 to 8, Spring Boot, JSF, Primefaces, JDBC, OracleDB, MySQL, Informix, Angular 8, and various version control systems.