Open to opportunities

Jaime Andres Alberto Olarte Fuentes

@jaimeandresalbertool

Message

Senior backend Java engineer delivering scalable systems, high uptime, and fast releases.

Colombia

Message

What I'm looking for

Busco un equipo que valore backend Java sólido: alta disponibilidad, pruebas reales >90%, APIs bien documentadas (OpenAPI), y automatización CI/CD en AWS. Quiero impactar con arquitectura escalable, baja latencia y mantenimiento de sistemas críticos con calidad.

En 10 años de desarrollo backend Java, he mantenido sistemas con 99.9% de uptime y mejorado la calidad con cobertura de pruebas >90% usando JUnit/Mockito. También he reducido tiempos de entrega en 30-60% mediante CI/CD en AWS, manteniendo una cultura de mantenimiento evolutivo y confiabilidad operativa.

Soy experto en Java 8/11/17 y Spring Boot (incluyendo microservicios) con Hibernate/JPA, PostgreSQL/Oracle y serialización con Jackson/JAXB. Desarrollo APIs REST/SOAP documentadas con OpenAPI/Swagger, aplicando SOLID, DDD y Clean Code para reducir deuda técnica y estandarizar contratos de integración.

He liderado mejoras medibles como 40% menos latencia en APIs críticas, 30% más rápido el ciclo de entrega y resolución de 100% de incidentes dentro del SLA. Actualmente, profundizo en arquitecturas de consistencia distribuida (patrones Saga, Transactional Outbox) y sigo impulsando proyectos que combinen resiliencia, observabilidad y pruebas sólidas.

Experience

Work history, roles, and key accomplishments

Current

Independiente - Arquitecturas

Current

Independiente

Feb 2026 - Present (4 months)

Focused on distributed consistency architectures (Saga, Transactional Outbox) and built personal projects to deepen backend design skills. Continuing active professional development while remaining available immediately.

Distributed Systems Saga Transactional Outboxes backend architecture Spring Boot

Senior Java Backend Developer

ITAC

Feb 2023 - Feb 2026 (3 years)

Optimized critical backend APIs on microservices Spring Boot, cutting API latency 40% and refactoring SQL queries in PostgreSQL/Oracle. Improved delivery speed 30%, reduced technical debt 25% via JUnit/Mockito coverage and OpenAPI contract documentation, and resolved 100% of critical incidents within production SLAs.

Spring Boot Microservices AWS PostgreSQL Oracle CI CD Junit

Senior Java Backend Developer

Grupo Mok

Jul 2022 - Feb 2023 (7 months)

Reduced production bugs 35% over 6 months by leading technical reviews focused on Streams/Lambdas, JVM exception handling, and Clean Code practices. Lowered critical incident resolution time 50% and achieved 90% uptime in microservice integrations by standardizing Jackson JSON serialization and OpenAPI REST contracts.

Spring Boot PostgreSQL MySQL REST Jackson

Backend Developer

Global66

May 2021 - Apr 2022 (11 months)

Increased CI/CD deployment frequency 7x by automating AWS CodePipeline and delivering event-driven microservices using SQS/SNS messaging and idempotent consumers. Maintained 0% transactional flow errors and delivered >90% test coverage across 12 months with JUnit/Mockito and TDD in Spring Boot and AWS Lambda.

Spring Boot AWS Lambda CI CD Liquibase Docker Junit Jackson

Java Developer

Nexos Software

Feb 2020 - May 2021 (1 year 3 months)

Supported mission-critical banking systems with 0 incidents during migration from Java 8 to Java 11, maintaining 100% uptime for 90 days post-migration. Reduced N2/N3 incident resolution time 40% by debugging WebLogic issues using heap dumps and JVM logs, and cut onboarding time 25% by producing UML diagrams and REST technical documentation.

Java 8 11 Spring Framework SQL Server REST Debugging UML

Ingeniero de Desarrollo

Fundación Cardiovascular de Colombia

Apr 2015 - Feb 2020 (4 years 10 months)

Maintained 99.9% uptime for 5 years on mission-critical Java EE/JBoss hospital systems through corrective, preventive, and evolutive improvements. Extended the lifetime of 3 legacy applications by 3 years, avoiding an estimated $150M COP replacement cost through strategic refactoring and improving test coverage from 30% to 85% with JUnit in every release.

Java EE JBoss SQL Server Junit Refactoring PrimeFaces