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Juan Carlos C
@jcarloscalleja
Java JSP SQL developer and Excel CSV cleanup
Spagna
Spagnolo
Chi sono
I am a Java developer with around three years of experience in enterprise applications, JSP, SQL and legacy system maintenance. I investigate reproducible bugs, provide focused corrections and explain the changes clearly. I also offer Excel and CSV cleanup and conversion of readable PDF tables into editable spreadsheets. My practical training includes Spring Boot, JUnit and Mockito. I work with clearly defined scopes, protect original data and check deliverables before sending them. Please message me to discuss your requirements.
Competenze
Juan Carlos C
offline •
Consulta i miei servizi
Pulizia dei dati
I will clean, organize and format your excel or CSV spreadsheets
Digitazione dati
I will convert PDF tables into clean editable excel spreadsheets
Portfolio
Esperienza lavorativa
Java Developer and Systems Engineer
Minsait
Oct 2023 - Present • 3 yrs 1 mo
Development and maintenance of enterprise payment applications using Java, JSP, Servlets, JavaBeans and SQL. Investigation of incidents across the web layer and COBOL service integrations, adaptation to requirements and functional verification. Participation in gradual modernization toward Spring Boot. Joined as Experienced Analyst in October 2023; Systems Engineer since January 2026.
Software Developer Intern
EPAM NEORIS
Mar 2023 - Jun 2023 • 3 mos
Internship developing APIs with Spring Boot and Spring Security, writing tests with JUnit and Mockito, and participating in Spring Batch processing and database development.
