Ralf Honório de Lima

• I work as a Software Engineer developing digital certification and digital security applications for issuing and controlling credentials with microservices distributed architecture. To support these projects I use Java, Kotlin, Spring, and NodeJs with the Google Cloud Platform infrastructure. Projects involve cloud technologies (Buckets, BigTable, CloudSQL, DataFlow, Kubernetes, Compute Engine, Cloud Run, and others) to support a large volume of issued credentials, and also score validations, we also deliver software with best practices of continuous integration, continuous delivery, testing, availability, and resilience with Kubernetes.
• Technical leader of a team of 5 senior software engineers, I was responsible for architecture, Proof of Concept development, alignment of business best practices with POs and stakeholders, and sprint planning.
• I migrated the Monolith architecture to Microservices, facilitating the segmentation of businesses and teams, resulting in more flexibility, resilience, and elasticity of services using Cloud Computer, CI/CD, Event Drive architecture, and DDD.
• I migrated the on-premise docker infrastructure to Kubernetes Cloud Engineer on GCP to reduce infrastructure costs and bring elastic and scalable services.
• Implementation of Event Drive Architecture with Google Pub/Sub using ack/nack strategy ensuring message delivery and using DLQ for reprocessing, supporting 800K invocations per day considering user requests and background tasks.
• Implemented caching patterns and buckets (stored images) to reduce the throughput to 70% of the response time.
• Implementation of design patterns (eg, a chain of responsibility, factories, and builders), SOLID concepts, and hex architecture, providing easy extensibility and maintenance.
• Transfer legacy data to new software using Google DataFlow. This process runs in parallel and quickly migrates a large volume of data.

• Experienced Java Developer specializing in systems development using the Spring Framework for backend solutions. I lead a team of three senior software engineers and one UX designer, focusing on architecture definition and the collection of both functional and non-functional requirements. Utilizing Domain-Driven Design (DDD), I align best business practices with product owners, stakeholders, and sprint planning.
• I spearheaded the implementation of GraphQL in a mobile application, replacing REST, to handle large data volumes. This approach enhanced data segmentation and optimized bandwidth usage. My expertise in the CAP theorem guided the selection of the most suitable NoSQL database, improving data manipulation, flexibility, and availability.
• I'm adept at applying performance optimization techniques, including refining database queries through indexing, normalization, denormalization, connection pooling, and returning only essential data. My approach also involves implementing lazy loading, effective caching strategies, and concurrent programming to enhance system efficiency and responsiveness.
• I have worked with the Spring Framework and Spring Boot, utilizing Java versions from 7 to 11.

I developed numerous applications for the financial sector at Banco Votorantim and BV Financeira, focusing on system development using Java technologies, including JSE, JEE, and the Spring Framework. My experience in these projects allowed me to gain a deep understanding of financial systems and the unique challenges they present.

I contributed to the development of a web-based financial system for a Factoring company, utilizing a multi-layered architecture approach. In the business layer, Enterprise JavaBeans (EJB) technology was employed for robust transaction management and business process execution. The persistence layer integrated JPA and Hibernate, ensuring efficient data handling and database interactions. The presentation layer was designed using JSF, combined with Facelets and RichFaces, to create a dynamic and user-friendly interface. My role in this project involved working on these various technologies, contributing to the creation of a highly functional and scalable system tailored to the specific needs of the financial sector.