Alejandro Villamizar

Java Backend Engineer

Perfil profissional

Backend engineer with 7+ years building resilient , cloud-native backends using Java , Spring Boot , Kafka , and AWS for e-commerce , banking , and healthcare . Expert in microservices , event-driven design , and high-availability systems

Experiência de trabalho

Java Backend Engineer

pro/source <it> | Junho 2024 - Maio 2025 (11 meses)

habilidades usadas

Built API-first integrations (REST/GraphQL + OAuth 2), applied CQRS, Dependency Injection, and documented architecture with ADRs. Ensured code quality with JUnit, Mockito, SonarQube (80% coverage).

realização principal

Designed event-driven microservices with Spring Boot & Kafka, optimized PostgreSQL, and replaced monoliths with AWS Fargate services. Raised NPS by 15% and ensured 99.95% availability.

Java Software Engineer

globant | Março 2021 - Outubro 2023 (2 años 7 meses)

habilidades usadas

Handled 200k+ daily requests, automated CI/CD with GitHub Actions, mentored junior engineers, and reduced integration bugs by 40%.

realização principal

Improved DB performance 70% with Redis caching, built microservices with Spring Boot, Kafka, AWS, and unified REST services with GraphQL.

Java Software Engineer

softcaribbean | Novembro 2020 - Março 2021 (4 meses)

habilidades usadas

Produced technical specs, enforced testing with JUnit/Mockito, led on-call rotation, and maintained 99.9% uptime.

realização principal

Delivered features with Java EE, Spring Boot, React, and Oracle. Improved code quality from 70% to 92% and cut integration time by 40%.

Formação acadêmica

Licenciado en Informática y Medios Audiovisuales Ingeniería de Software
Universidad de córdoba (co) | Profesional

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