Alef Chaves

Currently, I am a Senior Software Engineer at Pismo/VISA, working in the Authorizations team. In this role, I actively contribute to the core business processes of authorization handling, including Base 1, Base 2, reconciliation, stand-in processing, and clearing. My work involves developing and optimizing critical systems to ensure efficient and accurate authorization processes for network transactions.

As a software engineer and founder of a startup, I prioritize quality, scalability, and maintainability in my work. My approach revolves around utilizing architectural principles such as Clean Architecture and Domain-Driven Design (DDD) to develop modular applications. I leverage a range of technologies, including Java 11, JUnit, Spring Boot, Spring Cloud, AWS, Hibernate, Spring Data JPA, Spring Web, and Restful APIs, to create reliable and efficient software solutions.

Currently, I am part of a dynamic team in a leading digital bank, specifically in the insurance squad, where I actively contribute to the development of innovative products and solutions. In this role, I am involved in the creation of Restful APIs, microservices, and scalable architectures, ensuring seamless experiences for our customers. Working with microservices, Java 11+, Spring Boot, Spring Data JPA, REST, JUnit, Feign Client, MongoDB, Hexagonal Architecture, Sonar, Docker, AWS services such as EKS, S3, EC2, SNS, SQS, Secret Manager, along with tools like Dynatrace, Kibana, Kiali, Azure DevOps, Jenkins, and following the Scrum methodology.

Responsible for developing a payment and collection platform for a major player in the financial sector, as a fullstack development engineer using technologies such as: Clean Arch, Microservices, Restful APIs, Java, Spring Framework, Junit, Mockito , Microfrontend, Angular, TypeScript, Jest and more.

Currently, allocated in one of the squads responsible for the development of Pix for a big player in the adiquiring sector, working with cutting-edge technologies such as: Clean Arch, Clean Code, Micro Services Architecture, Reactive Programming, Sonar, Restful APIs, Java, Spring , WebFlux, Junit, Mockito, GitLab, Cucumber, MongoDB, Apache Kafka, SNS, SQS and others.

In this context I worked as one of the software engineers responsible for the development and integration of PIX (instant payment system) for a big player in the acquirer sector. working with technologies such as: Microservices, Amazon Web Service, Spring Web Flux, hexagonal architecture.

Algorithms and Graphs: I gained advanced knowledge in algorithms, analysis, and efficiency, as well as design techniques like divide and conquer, dynamic programming, and greedy methods. I studied NP-completeness theory and polynomial reductions. I developed strong problem-solving skills using graphs and applying efficient algorithms. Distributed Systems: I deepened my understanding of distributed systems, working with consensus protocols and blockchain technologies like Hyperledger Fabric. I gained experience in implementing consensus protocols and exploring blockchain applications in distributed environments.

As a software developer in an event ticket sales application, my main responsibility was to provide maintenance and develop new functionalities using Spring, Java, Junit, MySQL and PHP with Laravel. I conducted tests to ensure the quality of implemented features, identifying and fixing bugs. I also actively participated in evaluating the technical feasibility of new ideas and proposed features.