Jorge Enrique Miralles Betancourt
Verified Expert in Engineering
Software Engineer and Developer
Dallas, TX, United States
Toptal member since May 8, 2025
Jorge is a senior software engineer with experience in designing, deploying, and optimizing large-scale distributed systems using Apache Pulsar, Java, and Spring Boot. He is skilled in fine-tuning high-throughput messaging platforms and event-driven architectures for on-prem and cloud environments. Jorge's expertise includes containerization and microservices, with a strong focus on scalability, reliability, and performance optimization.
Portfolio
Experience
- Java - 12 years
- SQL - 10 years
- Spring Boot - 10 years
- JavaScript - 8 years
- Docker - 8 years
- Apache Pulsar - 7 years
- AWS IoT - 7 years
- React - 5 years
Availability
Preferred Environment
Linux, MacOS, Spring Boot, Amazon
The most amazing...
...thing I've implemented is BigQ, an Apache Pulsar wrapper service, to handle over 30 million requests per minute (RPM) with response times under 10ms.
Work Experience
Senior Pulsar Architect
MercadoLibre
- Collaborated with MercadoLibre, the biggest eCommerce company in Latam and the most valuable company currently in Latam.
- Improved service performance by iteratively optimizing system architecture and implementing reactive microservices using Spring Boot (WebFlux) and Netty, achieving up to 30% lower latency and reduced resource consumption.
- Took ownership of BigQ, a small-scale messaging service based on Apache Pulsar, and led its transformation into a world-class, enterprise-grade messaging platform.
- Maintained strict performance SLAs with under 20ms average response time, throughput of 30 million messages per minute across over 30 Apache Pulsar clusters.
- Increased BigQ's resilience and observability by implementing high-availability strategies like failover, backup, and multi-region, as well as improving monitoring and logging practices.
- Upgraded Pulsar from early incubator versions to production-ready releases, including custom ARM builds to reduce cloud costs by up to 40%.
- Tuned Broker, Bookie, and Zookeeper configurations for optimal performance, significantly reducing latency and improving throughput.
Software Engineer
Independent
- Built a responsive single-page application using React and Firebase.
- Implemented features such as user authentication, data storage, and real-time updates using Firebase services.
- Headed the architectural design and security model for a full-stack framework in PHP and Node.js.
- Implemented core classes, ORM layers, RBAC architecture, different OAuth modules, and front-end support using Ext JS, Bootstrap, and Angular.
- Designed Android app and back-end architecture in PHP with Raptor 2.
- Integrated CRUD logic, optimized search algorithms, and deployed to production.
Mid-level Back-end Engineer
GEOCOM Uruguay
- Migrated core features from Spring 2.5 to Spring 3, improving maintainability and development speed.
- Enhanced transaction performance by 18% by profiling and integrating Redis and MongoDB.
- Delivered new features and bug fixes across 10+ sprints, improving delivery reliability in an Agile team.
- Maintained and contributed to the migration of the UI from AngularJS to React.
Software Engineer
Joven Club de Computación y Electrónica
- Developed SEAT ERP, a transportation statistics system, increasing operational efficiency by 68%.
- Designed and implemented multiple systems using PHP (Symfony and Raptor 2), PostgreSQL, and Android integration.
- Built a C++ authentication plugin for Unix and integrated a biometric security system.
- Headed architectural and database design for internal government and infrastructure systems, including SEAT ERP, AlmaXen—a warehouse inventory system—and government problem bank management.
Experience
Web Portal for Commercial Driver's License School
https://westcdltraining.com/Education
Bachelor's Degree in Computer Science
University of Informatics Sciences - Havana, Cuba
Skills
Libraries/APIs
REST APIs, React, Node.js
Tools
GitHub, AWS CloudFormation, Docker Compose, Amazon Simple Queue Service (SQS), RabbitMQ
Languages
Java, SQL, JavaScript, TypeScript, PHP, C++
Frameworks
Spring Boot, Spring 3, Angular, Laravel
Paradigms
Agile, Scrum, Microservices, Event-driven Architecture
Platforms
Linux, AWS IoT, Amazon EC2, Docker, Amazon Web Services (AWS), MacOS, AWS Lambda, Google Cloud Platform (GCP), Android, Firebase, Amazon
Storage
Amazon DynamoDB, Amazon S3 (AWS S3), MongoDB, Redis, Google Cloud
Other
Engineering Software, API Integration, Distributed Architecture, Back-end, Apache Pulsar, Amazon Kinesis, CI/CD Pipelines, Distributed Systems, Large-scale Distributed Systems, Quarkus, OAuth, Containerization
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