Bruno Leite, Software Architecture Developer in Garopaba - Santa Catarina, Brazil
Bruno Leite

Software Architecture Developer in Garopaba - Santa Catarina, Brazil

Member since May 12, 2014
Bruno is a creative and forward-thinker back-end engineer and Oracle-certified Java programmer who can architect scalable systems with Java 8+, Spring, and AWS. He enjoys writing clean and testable code, has architected two projects from the ground up, and worked as a cloud engineer to make an IoT system scalable. Bruno can learn things fast and has clarity of mind, and he regularly contributes to the improvement of lean processes.
Bruno is now available for hire


  • Shoshin Works
    Java, Spring, Back-end Development, RESTful Web Services, MySQL...
  • Wearsafe Labs
    Spring, Java 8, Back-end Development, RESTful Web Services, MySQL...
  • Rebel Minds
    Java, Heroku, Spring, Back-end Development, RESTful Web Services, MySQL...



Garopaba - Santa Catarina, Brazil



Preferred Environment

IntelliJ IDEA, Linux

The most amazing...

...application I've architected is EM2, an app that monitors insurance customers' satisfaction levels using dynamic questionnaires that adapt to each person.


  • Back-end Engineer

    2021 - 2021
    Shoshin Works
    • Developed an app that gathers data from multiple sources, inputs this data into an NLP processor, and provides data visualizations to predict the future.
    • Integrated with SerpApi to get data from Google services and Zyte API for HTML data processing.
    • Created abstract Java components that facilitate the addition of new external services.
    • Managed a Java with Spring Data connection to a MongoDB instance on MongoDB Atlas.
    Technologies: Java, Spring, Back-end Development, RESTful Web Services, MySQL, Agile Software Development
  • Java/Spring Engineer

    2019 - 2021
    Wearsafe Labs
    • Developed Java AWS Lambda functions for processing IoT messages from personal safety devices. Configured AWS IoT rules and Kinesis Stream to interact with the Lambda function.
    • Created a Java critical section locking mechanism to handle parallel processing of device messages and avoid concurrent changes on devices.
    • Improved the legacy codebase with constant refactoring, reorganization of dependencies, and introduction of unit tests, integration tests, and end-to-end tests. That heavily increased delivery reliability and sped up the deployment cycle.
    • Improved the overall development processes with better PR reviews and helped propose a better scrum process by keeping it lean.
    • Implemented a solution to avoid duplicate message processing using Memcached on AWS Elasticache.
    • Created an end-to-end tester platform to allow testing messages flow from AWS IoT to Kinesis, Lambdas, Java API, and DB.
    • Developed a continuous delivery strategy for zero downtime on production deployments allowing a rollback when necessary.
    • Created an AWS Lambda function for processing and storing the device's audio data on S3.
    • Redesigned DB integration test architecture, enabling tests to run up to five times faster and with 1/3 code lines.
    • Implemented an AWS X-Ray tracing service for an API, instrumenting AWS Lambda and external services calls.
    Technologies: Spring, Java 8, Back-end Development, RESTful Web Services, MySQL, Agile Software Development
  • Java Architect

    2020 - 2020
    Rebel Minds
    • Developed an MVP application using Spring Boot to send out forms to clients, process their responses, and provide a dashboard for analyzing the responses.
    • Structured a microservices architecture using Netflix Eureka.
    • Created a deployment pipeline using Github and Heroku.
    • Developed REST API integrations with Typeform and
    Technologies: Java, Heroku, Spring, Back-end Development, RESTful Web Services, MySQL, Agile Software Development
  • Java Architect

    2019 - 2019
    Dandelion Development
    • Defined project structure with Spring Boot 2 and developed most of the application.
    • Led two other developers ensuring code quality and testability through code reviews.
    • Created an integration layer for interacting with ERP and CRM sides using Spring 5's new web client.
    • Created test cases structure for each code sector: controllers, database, and entities. Achieved 75%+ overall code coverage.
    Technologies: Spring Boot, Spring 5, Java 8, Back-end Development, RESTful Web Services, MySQL, Agile Software Development
  • Java Engineer

    2018 - 2018
    • Created definitions of how to integrate with external services from logistics providers, matching our modeling to providers' custom modeling.
    • Developed integrations with logistics carriers using an API made by P44 for data parsing/processing.
    • Developed unit and integration tests for components using the latest standards.
    Technologies: Spring, Java 8, Back-end Development, RESTful Web Services, Agile Software Development
  • Java Lead Engineer

    2017 - 2018
    Aon Inpoint
    • Architected a complete Java 8 with Spring Boot project.
    • Created REST web services for survey processing, reports, benchmark, and client configurations.
    • Developed full project test coverage with multiple scenarios.
    • Created an email processing and queuing system for sending out surveys.
    • Implemented a multi-language survey system that adapts to each user.
    • Implemented user security with JSON Web Token (JWT), including endpoints and authentication.
    • Created the continuous integration and deployment pipeline with Docker and CircleCI.
    Technologies: Spring, Java 8, Back-end Development, RESTful Web Services, Agile Software Development
  • Back-end and Web Developer

    2016 - 2017
    • Architected an AngularJS web front-end application using Grunt.
    • Structured the deployment pipeline using CircleCI and Cloud66.
    • Developed a standalone Java application that runs on clients to extract DB information from legacy Sybase and communicate to an FTP server.
    • Created a Spring Batch data integrator that imports data from various clients into a multi-retailer DB.
    Technologies: AngularJS, Spring, Java 8, Back-end Development, RESTful Web Services, Agile Software Development
  • Java Engineer

    2015 - 2017
    Tasting Table
    • Developed a web application using AngularJS and Bootstrap 3 for creating multiple crops of a single picture.
    • Managed Ubuntu Linux servers and Wildfly application server.
    • Created REST integration with and Imgix APIs to post-process images.
    • Managed a (Back4App) application and created JavaScript functions, cloud jobs, and integration with Foursquare, Yelp, and Algolia APIs.
    • Created Node.js tests for functions using Mocha, Sinon, and Chai.
    • Developed a dashboard that retrieves restaurant information using Foursquare API. Used Spring Boot and AngularJS.
    Technologies: Python, AngularJS, Java, Back-end Development, RESTful Web Services, Agile Software Development
  • Java Senior Developer and Architect

    2013 - 2015
    • Handled architecture and development of Jakarta EE components using SOAP and RESTful web services, test-driven development (TDD), JPA (OpenJPA and Hibernate), unit testing (JUnit and JMock), integration testing, and a continuous delivery model.
    • Implemented architecture and set up of cloud environments, creating images and a provision/de-provision process. The environments were used as environments for developers hired through the IBM Liquid platform.
    • Led development events in the IBM Liquid platform (a crowdsourcing platform of short cycle assignments), creating development specifications, validating solutions provided by developers, and integrating code into the existing one.
    • Created and improved processes for automating tasks such as deployments, module packaging, and Websphere management with Python scripting.
    • Handled administration and configuration of the Websphere Application Server.
    • Worked as a support analyst, providing ongoing support for high-availability production environments.
    Technologies: Java EE, Back-end Development, RESTful Web Services, Agile Software Development
  • Java Developer

    2011 - 2012
    • Developed Java components for managing security in ADP's portal application.
    • Worked on the migration of a portal platform to a PaaS business model.
    • Worked in an agile team with a goal-oriented pace with daily scrum meetings.
    Technologies: Java, Back-end Development, RESTful Web Services, Agile Software Development


  • Wearsafe Cloud

    A cloud-based app for managing wearable safety devices data. I was a back-end developer, responsible for providing solutions to scalability issues and improving the project code quality and test coverage. Created various components and extensions to the existing project with success.

  • Experience Monitor 2

    EM2 is an application to assess insurance customers' satisfaction levels based on net promoter scores and questionnaires. I've worked as the lead architect and back-end developer on EM2, an application built with Java 8 and Spring. I've been responsible for the architectural decisions including which technologies and APIs to use, how to structure translating system, and usage of design patterns, deployment pipeline, security implementation, REST endpoints layout, and more.

    "Everyone was happy, we delivered as promised and under budget [...] the client has taken over maintenance of the solution." – Richard Forsythe, PM

  • Mhsync

    An app that synchronizes data from the MarinaTek platform to Hubspot. Worked as the lead architect of an ERP to CRM integration with Data Warehouse. The project was a great success with almost zero issues.

  • GroceryPress

    GroceryPress is a personalized digital promotions and loyalty applications suite for natural and specialty retailers. I worked as a full-stack engineer in the project, first building a front-end application called Consumer using AngularJS. I structured the whole architecture, continuous integration, and continuous deployment. I built a console application that runs on client machines to extract data from Sybase databases as well as manipulate and communicate to the GroceryPress FTP server using Java with Gradle builds. I worked on the core application on the ingestion module to enable Spring Batch ingestion of client data into a multi-retailer database.

  • IBM – IEPD

    IEPD is an inter-enterprise data orchestrator that treats and routes calls from failing hardware devices and takes immediate actions to solve the problems. Those calls can come from web service calls or emails. I worked as a Java developer, writing components for that application. After 2013, IBM started using a new methodology for development called Liquid, where the development is packed in small pieces and externalized. I worked on implementing this new methodology in our project, preparing environments in cloud servers, planning the specifications for the developers, overseeing the process, and reviewing the code.

  • Guide to Spring Boot REST API Error Handling (Publication)
    Spring Boot gives very useful error messages to engineers building REST APIs. Yet, those same messages are noisy and useless for the API consumer, not to mention they reveal implementation details. Luckily, there are simple ways of handling this.


  • Languages

    Java, SQL, JavaScript, Java 8, Java 11, Python
  • Frameworks

    Spring, Hibernate, JUnit, JPA, Spring Boot, JSON Web Tokens (JWT), Spring Batch, AngularJS, Spring Security, Spring 5
  • Libraries/APIs

  • Tools

    CircleCI, Cloud66, Docker Hub, Eclipse IDE, GitHub, IntelliJ IDEA, Apache Tomcat, Jenkins, Git, Shell, Maven, Amazon Virtual Private Cloud (VPC)
  • Paradigms

    Continuous Integration (CI), REST, Unit Testing, Scrum, Test-driven Development (TDD), Software Testing, Agile Software Development, Object-oriented Programming (OOP), Agile, Microservices, DevOps
  • Platforms

    Amazon Web Services (AWS), Docker, Linux, AWS Lambda, Ubuntu, AWS IoT, Java EE, Heroku
  • Storage

    AWS S3, Spring Data JPA, JSON, PostgreSQL, MySQL, Spring Data, Microsoft SQL Server
  • Other

    RESTful Web Services, Software Architecture, Back-end Development, Integration Testing, Cloud Computing, Scalability, AWS, Writing & Editing, Reactive Streams, Computer Engineering, Project Reactor


  • Bachelor's Degree in Computer Engineering
    2005 - 2013
    Pontificia Universidade Católica do Rio Grande do Sul - Porto Alegre, Brazil


  • Java Reactive Programming
    JUNE 2022 - PRESENT
  • Oracle Certified Professional, Java SE Programmer
    MAY 2011 - PRESENT

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