Carlos Carrillo

I’m a Senior Software Engineer with 5+ years of experience designing, developing, and migrating robust backend architectures and scalable microservices using Java (Spring Boot) and Python. I focus on high-concurrency systems, data integrity, and asynchronous processing in FinTech and trading platform environments.

At Excent Capital Ltd, I led backend development for the Finance domain within an international trading platform, implementing complex business logic under a hybrid cloud architecture using Spring Boot and Python modules deployed on AWS. I optimized PostgreSQL queries and MongoDB data structures to eliminate race conditions, while engineering secure, event-driven workflows with Apache Kafka and RabbitMQ plus Celery for real-time streaming and asynchronous deposits/withdrawals.

I’ve also worked as a Technical Lead for freelance enterprise clients, developing high-quality backend microservices in Java, Kotlin, and Spring Boot. I managed technical requirements end-to-end, including Git-based version control architecture and direct stakeholder communication in English.

Earlier, at Secretaría de Finanzas y Planeación (SEFIPLAN), I spearheaded migration from legacy systems to modern services and microservices in Java/Spring Boot. I translated complex fiscal and regulatory policies into actionable software requirements, implemented OAuth2/JWT-based security, and used Apache Kafka for high-availability data synchronization—plus I contributed to gRPC-based real-time communication and Go backend services at Grupo Aprentia.