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jcarloscalleja

Juan Carlos C

@jcarloscalleja

Java JSP SQL developer and Excel CSV cleanup

Spanien
Spanisch
Einige Informationen werden in englischer Sprache angezeigt.
Über mich
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.... Mehr lesen

Kompetenzen

j
jcarloscalleja
Juan Carlos C
offline • 

Meine Dienstleistungen

Datenbereinigung
I will clean, organize and format your excel or CSV spreadsheets
Ab20 $ / ProjektWeitere Details
Dateneingabe
I will convert PDF tables into clean editable excel spreadsheets
Ab20 $ / ProjektWeitere Details

Portfolio

Arbeitserfahrung

Minsait

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.

EPAM_NEORIS

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.