Joao is available for hire
Hire JoaoJoao Paulo Nascimento
Verified Expert in Engineering
Software Engineer and Developer
Brasília - Federal District, Brazil
Toptal member since November 21, 2024
Bio
Joao is a seasoned software engineer with over 10 years of experience specializing in back-end development. His expertise spans multiple industries, including banking, government, and technology, where he has consistently delivered high-performance, scalable, and secure software solutions. With a degree in computer science and a strong foundation in modern technologies and development practices, Joao brings a unique skill set to any project.
Portfolio
Act
Java, Springbot, Quarkus, Go, Kotlin, Amazon Web Services (AWS), Apache Kafka...
Finnet
Java, Springbot, Kotlin, Amazon Web Services (AWS), Go, Kafka Streams...
CWI Software
Java, Kotlin, Go, Amazon Web Services (AWS), Kafka Streams, Apache Kafka...
Experience
- Software Engineering - 10 years
- Springbot - 10 years
- Java - 10 years
- Kafka Streams - 8 years
- Amazon - 6 years
- Amazon Web Services (AWS) - 6 years
- Kotlin - 4 years
- Quarkus - 3 years
Preferred Environment
MacOS, Linux
The most amazing...
...solution I've developed is a financial application for a bank that required exceptional security, stability, and performance.
Work Experience
Senior Software Engineer
2022 - PRESENT
Act
- Worked on a financial application for a bank, a project requiring high security and stability.
- Handled architecture development, solution design, maintenance, and bug fixing.
- Collaborated closely with the development team and implemented SOLID principles and good programming practices to handle a large volume of transactions.
Technologies: Java, Springbot, Quarkus, Go, Kotlin, Amazon Web Services (AWS), Apache Kafka, Kubernetes, Jenkins, SOLID Principles, Spring Boot, REST APIs, SQL, APIs, Spring, Terraform, Architecture, Code Review, Software Development
Senior Software Engineer
2021 - 2022
Finnet
- Developed a payment gateway software system that served as a central hub to facilitate the integration of multiple banks.
- Handled complete development cycles and software architecture tasks.
- Ensured a seamless experience for users accessing and managing their financial transactions across various banking platforms.
Technologies: Java, Springbot, Kotlin, Amazon Web Services (AWS), Go, Kafka Streams, Kubernetes, Spring Boot, REST APIs, SQL, APIs, Spring, Google Cloud Platform (GCP), Terraform, Architecture, Code Review, Software Development
Senior Software Engineer
2020 - 2021
CWI Software
- Developed the PIX payment solution, Brazil's new bank transfer system. Due to the critical nature of real-time transactions, the project demanded high performance and constant availability.
- Handled full development cycles, bug fixes, and architecture design tasks.
- Ensured certain specific banks were at the forefront of implementing and adapting to this innovative Brazilian financial system.
Technologies: Java, Kotlin, Go, Amazon Web Services (AWS), Kafka Streams, Apache Kafka, Kubernetes, Jenkins, Spring Boot, REST APIs, SQL, APIs, Spring, Architecture, Code Review, Software Development
Senior Software Engineer
2018 - 2020
Santex Group
- Worked on developing a robust vehicle tracking system designed to handle millions of location requests per day with high availability and scalability as the key priorities.
- Completed all development cycles for the tracking system, including requirements gathering, architecture design, and quality assurance.
- Ensured efficient message processing and real-time updates in the system by leveraging various modern technologies, including Apache Kafka, Java, Spring Boot, ActiveMQ, and microservices.
Technologies: Amazon Web Services (AWS), Java, Kotlin, Amazon Simple Queue Service (SQS), Kafka Streams, Kubernetes, Jenkins, ActiveMQ, Elasticsearch, Spring Boot, REST APIs, SQL, APIs, Spring, Architecture, Code Review, Software Development
Software Engineer
2016 - 2018
Basis Tecnologia da Informação
- Handled the development of software solutions for the Brazilian government, collaborating with various ministries, including the Federal Justice Council.
- Worked on development tasks, maintenance, architecture design, and bug fixing.
- Learned the intricacies of governmental systems and the unique challenges they present.
Technologies: Java, PHP, Angular, Amazon Web Services (AWS), Oracle, MongoDB, Spring Boot, REST APIs, SQL, APIs, Spring, Code Review, Software Development
Software Engineer
2015 - 2016
CTIS
- Collaborated with several ministries in culture, science and technology, and education. One of my most significant contributions was assisting in developing a system for students' national examinations.
- Handled architectural design tasks and full development and maintenance cycles.
- Ensured high availability and optimal performance in the national examinations system, leveraging technologies including PHP, Zend, Yii, Symfony, Laravel, and Angular.
Technologies: Java, PHP, Angular, PostgreSQL 10, Oracle, Spring Boot, REST APIs, SQL, APIs, Spring, Code Review, Software Development
Software Engineer
2014 - 2015
Show Tecnologia
- Developed a state-of-the-art tracking system, participating in architectural design discussions and decision-making meetings.
- Handled the tracking system's development cycle, CI/CD pipeline development, quality tests, and architecture design tasks.
- Made the system as robust as possible, ensuring it successfully managed thousands of requests per second without compromising performance.
Technologies: PHP, Angular, Java, PostgreSQL 10, REST APIs, SQL, APIs, Spring, Code Review, Software Development
Experience
Vehicle Tracking Solution
http://www.showtecnologia.comThis project involved developing a software system to handle thousands of requests per second from tracked vehicles. I designed this architecture using Springbot and AWS. Part of my work also involved creating a gateway to handle all the incoming requests and implementing queues with Kubernetes. The system prioritized high availability and stability.
Education
2022 - 2023
Postgraduate Program in Software Architecture
University Vale do Rio Verde - Brazil
2009 - 2013
Bachelor's Degree in Computer Science
Federal University of Paraíba - Brazil
Certifications
FEBRUARY 2021 - PRESENT
AWS Certified Cloud Practitioner
Amazon Web Services (AWS)
Skills
Libraries/APIs
REST APIs
Tools
Kafka Streams, Amazon Simple Queue Service (SQS), Jenkins, ActiveMQ, Terraform
Languages
Java, SQL, Kotlin, PHP, Go
Frameworks
Spring Boot, Spring, Angular
Platforms
Amazon Web Services (AWS), Google Cloud Platform (GCP), Oracle, Kubernetes, Apache Kafka, Amazon, MacOS, Linux
Storage
PostgreSQL 10, MongoDB, Elasticsearch
Other
Springbot, APIs, Architecture, Code Review, Software Development, Software Engineering, Quarkus, Software Architecture, Scalability, Reliability, Performance, Computer Science, Enterprise Integration, Messaging, Architectural Design, SOLID Principles
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