Paulo is available for hire
Hire PauloPaulo Rodrigues
Verified Expert in Engineering
Software Developer
Recife - State of Pernambuco, Brazil
Toptal member since November 18, 2020
Bio
Paulo is an enthusiastic software engineer with 14+ years of experience developing high-scale systems in multiple technology stacks. He loves using technology to solve real-world problems, having worked and led projects in awarded startups from the financial, education, and health markets. Paulo has great expertise in the development of microservices and web applications following the best engineering practices.
Portfolio
PLS Logistics - GoShip
Java, Angular, JavaScript, Spring, AngularJS, Agile, CI/CD Pipelines, Hibernate...
Zeal IT Consultants
Java, Microservices, Spring Boot, Docker, Amazon Web Services (AWS), PostgreSQL...
GoDocs
MVC Frameworks, C#, C#.NET, Visual Studio, HTML, CSS, JavaScript, .NET...
Experience
- Back-end Development - 15 years
- Java - 14 years
- JavaScript - 11 years
- C# - 7 years
- Microservices - 5 years
- Spring Boot - 5 years
- TypeScript - 2 years
- Kotlin - 2 years
Availability
Part-time
Preferred Environment
Windows, Linux, Git, Visual Studio Code (VS Code), MacOS, IntelliJ IDEA, JetBrains Rider, Visual Studio
The most amazing...
...thing I've done was to lead the technology team of an awarded startup project that raised the education levels of public schools of a Brazilian state.
Work Experience
Senior Software Engineer
2023 - 2024
PLS Logistics - GoShip
- Developed microservices for a major modernization project, replacing legacy systems and boosting the processing capacity of 1+ million annual loads.
- Investigated and resolved performance issues, optimizing memory and CPU configurations in a Kubernetes environment.
- Pioneered the implementation of server-sent events (SSE) in the project, enabling real-time push notifications for user updates and enhancing application interactivity and user experience.
- Developed front-end components using JavaScript and AngularJS.
- Introduced and integrated resiliency patterns, specifically implementing robust retry mechanisms to decrease failure rates during calls to other microservices and fortify the project's overall reliability.
- Participated actively in releases, code reviews, and design discussions.
Technologies: Java, Angular, JavaScript, Spring, AngularJS, Agile, CI/CD Pipelines, Hibernate, RabbitMQ, Spring Boot, PostgreSQL, Google Cloud Platform (GCP), Full-stack Development, JSON/XML Schemas, Confluence, GitLab CI/CD, Enterprise Application Development, API Development, Repository Pattern, Web Development, Cloud Architecture, Push Notifications, Spring Microservice, Apache Tomcat, JDBC, Data Pipelines, IntelliJ SDK, API Design, API/Services Architecture, Code Review, HTTP REST
Senior Software Engineer
2021 - 2022
Zeal IT Consultants
- Designed and developed microservices using Java, Spring Boot, and PostgreSQL.
- Applied event-driven architecture principles to develop loosely coupled microservices using Apache Kafka.
- Implemented microservice patterns to attend to desired consistency and delivery requirements.
- Provided guidance and mentoring to three mid-level junior engineers.
- Developed CI/CD pipelines to optimize build, test, and deployment.
- Created reusable GitHub private actions to perform service-checking operations, preventing the deployment of broken versions to production and reducing 70% of the needed code.
- Integrated services with New Relic giving monitoring capabilities to the team and reducing service downtime.
- Implemented data audit mechanisms providing data change tracking from multiple sources.
- Implemented consumer-driven contract testing using Pact to ensure communication and compatibility between microservices.
- Implemented integration tests to ensure desired application behavior in concurrent scenarios.
Technologies: Java, Microservices, Spring Boot, Docker, Amazon Web Services (AWS), PostgreSQL, Kubernetes, Apache Kafka, Continuous Delivery (CD), Continuous Integration (CI), Couchbase, Pact, Integration Testing, Relational Databases, Java 11, JUnit, Bash Script, DevOps, REST APIs, API Integration, Kafka Streams, Web API, Bash, Microservices Architecture, Databases, CI/CD Pipelines, Java 8, Java 17, Mockito, GitHub Actions, GitOps, Web Architecture, API Architecture, RESTful Development, Agile, Back-end Development, Distributed Systems, JSON/XML Schemas, Confluence, Enterprise Application Development, Event-driven Architecture, API Development, Event-driven Programming, Repository Pattern, NoSQL, Spring Microservice, GitHub, Apache Tomcat, JDBC, Data Pipelines, IntelliJ SDK, API Design, API/Services Architecture, Code Review, HTTP REST
Senior Software Engineer
2020 - 2021
GoDocs
- Designed and developed specialized mortgage software for customers within various entities, applying necessary regulatory and legal requirements.
- Designed new system architecture using C#, .NET Core, and Vue.
- Revised old code bases and refactored application modules to adopt modern development standards, tools, practices, and frameworks.
- Created a refactoring plan for a team of five software engineers.
- Guided engineers to adopt modern practices and frameworks to increase maintainability and productivity.
- Communicated with investors to illustrate deficits and bottlenecks within existing software and proposed a refactoring plan.
Technologies: MVC Frameworks, C#, C#.NET, Visual Studio, HTML, CSS, JavaScript, .NET, Microsoft SQL Server, Bootstrap, Full-stack, SQL, Vue, jQuery, GitLab, Jira, .NET Core, Architecture, Relational Databases, API Integration, Web API, Model View Controller (MVC), .NET 4, SQL Server 2016, ASP.NET, Databases, Front-end, XML, .NET 5, Web Architecture, ASP.NET Core, Front-end Development, JavaScript MVC, API Architecture, Agile, Back-end Development, Full-stack Development, JSON/XML Schemas, Entity Framework, GitLab CI/CD, API Development, Repository Pattern, MVC Razor, Web Development, Cloud Architecture, Apache Tomcat, Data Pipelines, Entity Framework Core, API Design, API/Services Architecture, Code Review, HTTP REST
Software Engineer
2017 - 2020
Acqio Payments
- Designed and developed high-scale microservices to support about three million monthly payment transactions using C# and Kotlin.
- Developed integrations with external payment gateways, resulting in a three-time increase in credit card brands supported by the product and a revenue growth of about 5%.
- Built web applications, mobile applications, and features in POS devices using technologies like Kotlin, C#, MVC.NET, C/C++, JavaScript, TypeScript, and React Native.
- Engineered the core framework to integrate services with the company's ERP.
- Reviewed codes from teammates and algorithms from candidates in the hiring process.
Technologies: Bootstrap, MVC Frameworks, REST, MVC Design, Scrum, Full-stack, REST APIs, Fintech, .NET, Back-end, Object-oriented Programming (OOP), NPoco, Web API, ASP.NET MVC, Docker, C#.NET, TypeScript, jQuery, JavaScript, Mockito, xUnit, Unit Testing, Test-driven Development (TDD), C++, C, Protocol Buffers, gRPC, APIs, Microservices, MongoDB, Azure Cosmos DB, Azure SQL, Microsoft SQL Server, Azure, React Native, Kotlin, C#, Architecture, Integration Testing, Relational Databases, Card Payments, API Integration, Cloud, EventBus, Model View Controller (MVC), .NET 4, Ajax, SQL Server 2016, Bash, Microservices Architecture, ASP.NET, Databases, Front-end, SSL, React, XML, Java 8, Web Architecture, ASP.NET Core, Front-end Development, JavaScript MVC, Financial Data, Data Visualization, .NET Core, Point of Sale, POS, API Architecture, RESTful Development, Agile, Back-end Development, Distributed Systems, Full-stack Development, JSON/XML Schemas, Digital Payments, Online Banking, Real-time Systems, Entity Framework, API Development, Repository Pattern, MVC Razor, Web Development, Cloud Architecture, NoSQL, Azure App Service, Algorithms, GitHub, JDBC, Entity Framework Core, API Design, API/Services Architecture, Code Review, Payment APIs
Cloud Computing Consultant
2012 - 2017
Self-employed
- Mapped best solutions to local companies to migrate their infrastructure to the cloud, mainly working with Amazon AWS.
- Migrated the infrastructure from a local eCommerce solutions company from a conventional host to AWS, including the eCommerce of one of the major local retail companies, which resulted in a cost reduction of 55% without any loss of performance.
- Redesigned the already existing infrastructure of an ERP company in AWS, resulting in a cost reduction of 75%.
Technologies: Amazon Web Services (AWS), Microsoft SQL Server, Amazon EC2, Architecture, AWS Cloud Architecture, Relational Databases, Bash Script, Cloud, SQL Server 2016, Databases, SSL, Azure, Azure SQL, Cloud Architecture, Azure App Service, GitHub, Amazon CloudFront CDN, Amazon S3 (AWS S3)
Systems Analyst
2013 - 2016
Foton Informatics
- Designed and developed large-scale and mission-critical Banking solutions using Java.
- Led a local development team of three engineers in the internet banking project.
- Participated in developing internet banking, bank automation, bank agency automation, and self-service center projects.
- Designed and developed a legacy bank system simulator, which removed the dependency on the client's legacy system and increased the team's productivity.
- Developed web services and integrated them with external and legacy systems.
Technologies: Back-end Development, JEE, MVC Frameworks, MVC Design, Full-stack, Object-oriented Programming (OOP), Jakarta EE, Microservices, Oracle, Web Services, APIs, Web Development, Banking & Finance, JSF, Spring, Java EE, Java, Integration Testing, Relational Databases, JUnit, API Integration, Core Banking Systems, Model View Controller (MVC), Ajax, Databases, Front-end, SSL, XML, XSD, XML Web Services, jPOS, Web Architecture, Front-end Development, JavaScript MVC, API Architecture, Technical Leadership, Full-stack Development, JSON/XML Schemas, Digital Payments, Online Banking, Real-time Systems, Enterprise Application Development, Repository Pattern, Spring Microservice, Apache Tomcat, JDBC, Reverse Engineering, Subversion (SVN), Eclipse, HTTP REST
Tech Lead | Software Engineer
2010 - 2013
Joy Street
- Led the company's technology team in an awarded project in the education market.
- Designed and developed a platform that includes a social network, a game server, and a back-office application using Java.
- Built the infrastructure in the Amazon AWS platform to achieve high scalability by applying clustering, load-balancing, and HA capabilities to support about 0.7 million users.
- Performed tuning and related tasks at server, application, and database levels to achieve performance and scalability needs.
- Provided guidance and mentoring to three mid-level junior engineers.
- Developed integration frameworks with third-party platforms like Wikipedia, WordPress, and Pentaho.
- Participated in the data warehouse and data mining company's project.
Technologies: JEE, MVC Frameworks, MVC Design, Scrum, Full-stack, Back-end, Jakarta EE, Linux, CSS, HTML5, Scalability, Web Scalability, jQuery, JavaScript, Amazon Web Services (AWS), MySQL, PostgreSQL, Pentaho, Apache Struts 2, Hibernate, JPA, Spring Data, Spring Security, Spring MVC, Spring, Java EE, Java, Amazon EC2, Architecture, AWS Cloud Architecture, Integration Testing, Relational Databases, Bash Script, REST APIs, API Integration, Caching, Cloud, Model View Controller (MVC), Ajax, Bash, Databases, Front-end, SSL, XML, XSD, XML Web Services, Ubuntu, Web Architecture, Front-end Development, JavaScript MVC, Data Visualization, Agile, Back-end Development, Technical Leadership, C#, Full-stack Development, JSON/XML Schemas, Repository Pattern, Web Development, Cloud Architecture, Collaboration, Spring Microservice, Apache Tomcat, JDBC, Amazon CloudFront CDN, Amazon S3 (AWS S3), Subversion (SVN), Eclipse
System Engineer
2009 - 2010
Meantime Mobile Creations
- Developed educational web platform for Government of Pernambuco state using mainly Java EE and Java Script.
- Implemented optimized tools to manipulate and import large data sets.
- Optimized SQL and HQL queries to extract strategic data to analysis from MySQL database.
Technologies: JEE, MVC Frameworks, MVC Design, Scrum, Full-stack, Back-end, Object-oriented Programming (OOP), Jakarta EE, CSS, HTML, JavaScript, Amazon Web Services (AWS), MySQL, Apache Maven, Apache Ant, Spring, Apache Struts 2, Java EE, Java, Relational Databases, Bash Script, REST APIs, API Integration, Caching, Model View Controller (MVC), Ajax, Databases, Front-end, XML, Ubuntu, Web Architecture, Front-end Development, JavaScript MVC, Data Visualization, Agile, Back-end Development, Distributed Systems, Full-stack Development, JSON/XML Schemas, Repository Pattern, Web Development, Cloud Architecture, Apache Tomcat, JDBC, Subversion (SVN), Eclipse
Software Developer
2008 - 2009
Vinic - Management and Projects
- Developed systems such as ERP, quality management, and hospital systems using Java.
- Mentored external client teams in design and development using Java.
- Developed strategic reports using iReport and BIRT.
Technologies: JEE, MVC Frameworks, MVC Design, Full-stack, Back-end, Object-oriented Programming (OOP), Jakarta EE, BIRT, iReport, Apache Maven, Oracle, PostgreSQL, JavaScript, JSF, Apache Struts, Java EE, Java, Relational Databases, Model View Controller (MVC), Databases, Front-end, Front-end Development, JavaScript MVC, Data Visualization, Agile, Back-end Development, Full-stack Development, Enterprise Application Development, Repository Pattern, Web Development, Apache Tomcat, JDBC, Subversion (SVN), Eclipse
Software Developer Intern
2007 - 2008
Contaline
- Developed the company's ERP product using ASP and VBScript.
- Developed management and accountability strategic reports.
- Managed the company's local and remote IT infrastructure.
Technologies: Full-stack, VBScript, SQL, Microsoft SQL Server, Active Server Pages (ASP), Relational Databases, Databases, Front-end, Front-end Development, Back-end Development, Full-stack Development, Enterprise Application Development
Experience
Account Manager Service
A microservice to aggregate and manage the organization's accounts.
This service was the source of truth for the account information. It was in charge of consuming Kafka messages from multiple sources, which included third-party applications, aggregating the data, applying for the needed business roles, and publishing a message to be consumed by others microservices of the solution.
Technologies used: Java, Spring Boot, PostgreSQL, and Kafka.
This service was the source of truth for the account information. It was in charge of consuming Kafka messages from multiple sources, which included third-party applications, aggregating the data, applying for the needed business roles, and publishing a message to be consumed by others microservices of the solution.
Technologies used: Java, Spring Boot, PostgreSQL, and Kafka.
Opportunity Manager Service
A microservice in charge of managing the opportunities of a hiring process.
This service was built to manage the opportunities of a staffing company, aggregating and applying the needed business rules over the related data.
Part of the solution was applied event-driven architecture; this service consumes and publishes data from Kafka clusters.
Technologies used: Java, Spring Boot, PostgreSQL, and Kafka.
This service was built to manage the opportunities of a staffing company, aggregating and applying the needed business rules over the related data.
Part of the solution was applied event-driven architecture; this service consumes and publishes data from Kafka clusters.
Technologies used: Java, Spring Boot, PostgreSQL, and Kafka.
Soccer Manager API
REST API to football/soccer fans create fantasy teams and sell or buy players.
The users can perform actions such as create an account, log in to the API, and manage their team selling and buying players. Users can also edit some specific information about their team and players.
Was also implemented an admin role in which CRUD users, players, and teams changing all its information.
This API was implemented using Spring Boot, Spring MVC, Spring Data, JPA, Hibernate, PostgreSQL, JWT, and Swagger (documentation).
Was also implemented integration and unit tests.
The users can perform actions such as create an account, log in to the API, and manage their team selling and buying players. Users can also edit some specific information about their team and players.
Was also implemented an admin role in which CRUD users, players, and teams changing all its information.
This API was implemented using Spring Boot, Spring MVC, Spring Data, JPA, Hibernate, PostgreSQL, JWT, and Swagger (documentation).
Was also implemented integration and unit tests.
Payments Authorization Service
A service to process credit card transactions from POS devices.
This service was integrated with an external payment gateways to make the authorizations with the credit card brands and other internal services to process the liquidation.
It was developed using C#, Protocol Buffers, and SQL Server.
This service was integrated with an external payment gateways to make the authorizations with the credit card brands and other internal services to process the liquidation.
It was developed using C#, Protocol Buffers, and SQL Server.
Transactions ERP Integration
A framework to integrate credit card transactions with the company's ERP.
This company had a huge amount of transactions per day and needs to integrate these transactions in the ERP to perform the financial and accounting tasks.
This system made the parsing of the transactions data into the proper ERP entries and group everything in a queue to send to the ERP web service.
This demands proper throughput management to do not overload the ERP web service and, at the same time, flow the data in the proper schedule to the financial and accounting teams.
This system was a base framework to integrate any other company information.
This company had a huge amount of transactions per day and needs to integrate these transactions in the ERP to perform the financial and accounting tasks.
This system made the parsing of the transactions data into the proper ERP entries and group everything in a queue to send to the ERP web service.
This demands proper throughput management to do not overload the ERP web service and, at the same time, flow the data in the proper schedule to the financial and accounting teams.
This system was a base framework to integrate any other company information.
OjE - Olympics of Digital Games and Education
https://www.youtube.com/watch?v=t1tbuoNRkYoAn innovative Social Network for the education market created to increase the educational rates of students of public schools.
This project won many awards due to its innovative nature and practical result.
I joined the initial phase, and it was initially built using Java, Struts, Hibernate, and MySQL.
As the project tech lead, I was responsible for the major technical decisions to achieve the business goals.
This project was later redesigned to use the Spring Stack, with Spring MVC, Spring Security, and Spring Data.
This project won many awards due to its innovative nature and practical result.
I joined the initial phase, and it was initially built using Java, Struts, Hibernate, and MySQL.
As the project tech lead, I was responsible for the major technical decisions to achieve the business goals.
This project was later redesigned to use the Spring Stack, with Spring MVC, Spring Security, and Spring Data.
OjE - Admin
A back-office application to manage the main company product (Olympic of digital games and education).
This web application gives dashboards, monitoring, and registration tools to the team monitor and makes strategic decisions to the platform's growth.
It was built using Java, Struts 2, Hibernate, and JasperReports.
This web application gives dashboards, monitoring, and registration tools to the team monitor and makes strategic decisions to the platform's growth.
It was built using Java, Struts 2, Hibernate, and JasperReports.
Banklink
A mission-critical bank automation system, it works as the core system of a banking solution. This project was built to replace an existing legacy system of a Brazil capital public bank. I was one of the backend-developers. The solution was built from scratch using Java using some libraries such as JPos and Preon to attend to the standards of the financial market and integrate with other legacy systems.
Legacy Bank Simulator
A Java-based application of a legacy bank system simulator.
This app's development resulted in a huge increase in team productivity that has been impacted due to a lot of problems accessing the real client legacy system.
This app's development resulted in a huge increase in team productivity that has been impacted due to a lot of problems accessing the real client legacy system.
To-Do Web App
A web application to create a to-do list provides the user with the basic functions needed to see and manage his own to-dos.
The back end was developed over the Spring stack, using Spring Boot, Spring MVC, Spring Security, and Spring Data. JWT was used in the security layer for authorization.
The front end was developed in Angular 9, TypeScript, and Bootstrap.
The back end was developed over the Spring stack, using Spring Boot, Spring MVC, Spring Security, and Spring Data. JWT was used in the security layer for authorization.
The front end was developed in Angular 9, TypeScript, and Bootstrap.
OpenMed
A web app for an ERP hospital system developed in Java EE platform.
This system provides control and management of all areas of big hospitals.
It was developed using Java, Struts, Hibernate, and JasperReports.
This system provides control and management of all areas of big hospitals.
It was developed using Java, Struts, Hibernate, and JasperReports.
OpenSGQ
A quality control system developed to attend a demand from a local maintenance park of Brazilian army forces.
As the principal developer, I built this system from scratch using the Java platform and frameworks Struts, Hibernate, and JasperReports.
As the principal developer, I built this system from scratch using the Java platform and frameworks Struts, Hibernate, and JasperReports.
Education
2011 - 2013
Master's Degree in Computer Science
Federal University of Pernambuco (UFPE) - Recife, PE, Brazil
2006 - 2010
Bachelor's Degree in Computer Science
UniFBV Wyden - Recife, PE, Brazil
Skills
Libraries/APIs
Web API, REST APIs, Entity Framework, API Development, JDBC, React, jQuery, JasperReports, NPoco, Vue
Tools
Visual Studio, Git, GitHub, Amazon CloudFront CDN, Subversion (SVN), Apache Maven, Kafka Streams, Apache Tomcat, iReport, Apache Ant, xUnit, GitLab, Jira, IntelliJ IDEA, JetBrains Rider, RabbitMQ, Confluence, GitLab CI/CD, Azure App Service
Languages
SQL, Java, JavaScript, CSS, C#, HTML, C#.NET, XML, Java 11, Java 8, TypeScript, Bash, XSD, Active Server Pages (ASP), VBScript, HTML5, Kotlin, C, C++, Hibernate Query Language (HQL), Bash Script
Frameworks
Spring, Hibernate, .NET, Mockito, Spring Boot, JUnit, .NET Core, .NET 4, ASP.NET, ASP.NET Core, JavaScript MVC, Spring Microservice, Angular, MVC Razor, Entity Framework Core, Apache Struts, JSF, Apache Struts 2, Spring MVC, Spring Security, JPA, React Native, gRPC, ASP.NET MVC, jPOS, JSON Web Tokens (JWT), Bootstrap, .NET 5, AngularJS
Paradigms
Microservices, Object-oriented Programming (OOP), MVC Design, REST, Model View Controller (MVC), Microservices Architecture, Web Architecture, API Architecture, RESTful Development, Agile, API/Services Architecture, Test-driven Development (TDD), Scrum, Continuous Integration (CI), Unit Testing, Continuous Delivery (CD), DevOps, Real-time Systems, Event-driven Architecture, Event-driven Programming
Platforms
Eclipse, Java EE, JEE, Amazon EC2, Linux, Amazon Web Services (AWS), Azure, Docker, Apache Kafka, Visual Studio Code (VS Code), Windows, Oracle, BIRT, Pentaho, Jakarta EE, Kubernetes, MacOS, Ubuntu, Google Cloud Platform (GCP)
Storage
Databases, Relational Databases, JSON/XML Schemas, Amazon S3 (AWS S3), PostgreSQL, MySQL, Azure SQL, SQL Server 2016, NoSQL, Microsoft SQL Server, Spring Data, Azure Cosmos DB, MongoDB, JSON, Spring Data JPA, Couchbase, Data Pipelines
Industry Expertise
Banking & Finance
Other
Web Development, APIs, Web Services, Back-end, Full-stack, MVC Frameworks, Back-end Development, Architecture, Integration Testing, API Integration, Cloud, Front-end Development, Financial Data, Data Visualization, Full-stack Development, Enterprise Application Development, Repository Pattern, IntelliJ SDK, API Design, Code Review, HTTP REST, Payment APIs, Fintech, AWS Cloud Architecture, Card Payments, Caching, Ajax, CI/CD Pipelines, Front-end, XML Web Services, GitHub Actions, Point of Sale, POS, Distributed Systems, Digital Payments, Online Banking, Cloud Architecture, Algorithms, Reverse Engineering, Software Engineering, Learning, System Design, Software Architecture, Cloud Computing, Scalability, Web Scalability, Protocol Buffers, Pact, VM, EventBus, Core Banking Systems, SSL, Java 17, GitOps, Technical Leadership, Push Notifications, Collaboration
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