Javier Martinez Perez
@javiermartinezperez
Backend Software Engineer at Keifi by Izertis, migrating MuleSoft APIs to Java and Spring Boot for financial services.
SpainWhat I'm looking for
At Keifi by Izertis / Izertis S.A., I migrate and implement REST APIs from MuleSoft to Java and Spring Boot, analyzing existing flows and ensuring functional equivalence.
I develop backend services for financial and card-related domains, integrating REST APIs with authentication and security flows using JWT, SAML, and OTP. I also troubleshoot issues across development and certification environments.
I use JUnit and Mockito for unit tests, and work with GitHub Actions, Docker, and OpenShift for CI/CD and deployments. I’m interested in continuing my career in product-focused environments.
Experience
Work history, roles, and key accomplishments
Backend Developer
Keifi by Izertis / Izertis S.A.
Sep 2025 - Present (1 year 1 month)
Migrate and implement REST APIs from MuleSoft to Java and Spring Boot, ensuring functional equivalence. Develop backend services for financial and card-related domains, integrating REST APIs and authentication flows.
Mathematics Tutor
IES Gabriel García Márquez
Jan 2025 - Jun 2025 (5 months)
Provided mathematics tutoring to students at IES Gabriel García Márquez.
Education
Degrees, certifications, and relevant coursework
Universidad Carlos III de Madrid
Bachelor of Science, Computer Science Engineering
Pursuing a Bachelor of Science in Computer Science Engineering, expected to complete in July 2026.
Availability
Location
SpainAuthorized to work in
Salary expectations
Social media
Job categories
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