Vinny Miana, Developer in São Paulo - State of São Paulo, Brazil
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Vinny Miana

Verified Expert  in Engineering

Software Developer

São Paulo - State of São Paulo, Brazil
Toptal Member Since
January 25, 2013

Vinicius is a seasoned, capable software architect who is an expert at developing efficient, scalable, and fault-tolerant server solutions for complex problems. He has extensive experience and skills with Agile processes as well as in Java, JEE, and Scala. He also excels at using open source solutions for projects.


Go, Terraform, Docker, Kubernetes, JEE, Java, Python, Payment APIs...
Universidade Presbiteriana Mackenzie
Swift, Play, Scala, Apache Struts, Git, Spring, JEE, Java...
Infillion (formerly The Mobile Majority)
Amazon Web Services (AWS), Ruby on Rails (RoR), Heroku, Apache Kafka, Play...




Preferred Environment

Git, IntelliJ, Linux, OS X, GoLand, PyCharm

The most amazing... I've built is a workforce optimization tool incorporating linear programming, statistics, and forecasting techniques to find an optimal work schedule.

Work Experience


2018 - PRESENT
  • Performed Go software development in a microservices architecture. Set up infrastructure as code using Terraform and migrated from Google Cloud Platform (GCP) and AWS to Azure.
  • Participated in the migration from monolithic JEE architecture to Go microservices-based architecture.
  • Integrated payment systems, such as Elavon and Ingenico.
  • Ensured PCI compliance by revisiting code, ensuring log compliance, and reviewing deployment architecture.
  • Developed Python notebooks using pandas for forecast analysis of the growth team.
Technologies: Go, Terraform, Docker, Kubernetes, JEE, Java, Python, Payment APIs, Card Payments, PCI, Google Cloud, Azure, HubSpot, Object-oriented Programming (OOP), Integration Testing, Django, Angular, Spring Boot, React, Amazon Web Services (AWS), Architecture, Microservices, APIs, JavaScript


2005 - 2018
Universidade Presbiteriana Mackenzie
  • Taught Java, Scala, Objective-C, and Swift programming, algorithm design, data structures, web development, and software quality to students at both undergraduate and graduate levels.
  • Mentored a group of 55 students in the development of iOS applications.
  • Coordinated research on the use of mobile technologies for STEM education in elementary schools.
  • Supervised undergraduate work on mobile development, software engineering, software quality, and frameworks.
  • Participated in different research projects applying innovation and information technology to provide digital transformation and disruptive technologies for different verticals, like law, finances, and general management.
  • Lectured Innovation and Entrepreneurship and mentored students in an incubator program.
Technologies: Swift, Play, Scala, Apache Struts, Git, Spring, JEE, Java, Test-driven Development (TDD), Agile Software Development, Object-oriented Programming (OOP), Spring Boot, Architecture, Microservices

Senior Software Engineer, Head of Brazil's Branch

2014 - 2016
Infillion (formerly The Mobile Majority)
  • Collaborated with the development team on a bidding and big data analytics platform.
  • Set up and managed the TMM branch in Brazil, including legal, accounting, tax, HR, budget, and financial reports.
  • Migrated the infrastructure from bare metal on SoftLayer to a cloud-based on AWS, bringing improvements in the performance and savings of over 30%.
  • Contributed to the migration of the platform's parts from Ruby on Rails (RoR) to Scala.
  • Mentored and led the Brazilian development team working on data engineering, RTB, and DevOps.
Technologies: Amazon Web Services (AWS), Ruby on Rails (RoR), Heroku, Apache Kafka, Play, Elasticsearch, Redis, MongoDB, Spark, Hadoop, Scala, Test-driven Development (TDD), Agile Software Development, Docker, Kubernetes, Terraform, Object-oriented Programming (OOP), CI/CD Pipelines, Unit Testing, Integration Testing, Spring Boot, Caching, Architecture, Microservices, APIs


2010 - 2013
Vortex Technologies
  • Performed as an IT consultant to several companies, helping them define architecture and design and develop their web applications.
  • Collaborated with two main hosting companies in Brazil, a major player in eCommerce payment systems and an insurance company.
  • Developed scalable applications using Java, Scala, and Python.
Technologies: RabbitMQ, Scrum, Apache Velocity, Confluence, Jira, Ant Design, Apache Maven, JUnit, Oracle, PostgreSQL, MySQL, Subversion (SVN), RESTEasy, Hibernate, Apache Struts 2, Spring, Scala, Jetty, JBoss, JEE, Java, Test-driven Development (TDD), Agile Software Development, Object-oriented Programming (OOP), CI/CD Pipelines, Unit Testing, Integration Testing, Full-stack, Full-stack Development, Spring Boot, Architecture, APIs


2008 - 2010
Hollywood Movie Magic/Serendipia
  • Implemented new CRM and accounting systems using open-source solutions for 60% of the code.
  • Maximized savings on software licensing and services costs.
  • Changed account bookkeeping methods to allow double entry recording and to comply with the needs of American and Mexican investors.
  • Implemented a print at home web system that allows customers to print movie tickets at home using the website.
  • Created several websites for the company's clients.
Technologies: SugarCRM, Ajax, Apache Velocity, HTML5, Spring, Hibernate, Apache Struts 2, Joomla, MySQL, WordPress, PHP, Apache Maven, Ant Design, Apache Tomcat, JEE, Java, Test-driven Development (TDD), Agile Software Development, Object-oriented Programming (OOP), Full-stack, Full-stack Development, Architecture


2007 - 2007
  • Transferred and integrated technology of Vortex Workforce into Locaweb's VoIP call center product.
  • Redesigned product architecture to increase its scalability.
  • Implemented an Agile development process using XP.
  • Developed a feed from Asterisk logs to produce business intelligence (BI) reports.
Technologies: Apache Struts, Jakarta Server Pages (JSP), Subversion (SVN), Hibernate, Spring, JEE, Java, Asterisk, Test-driven Development (TDD), Agile Software Development, Object-oriented Programming (OOP), CI/CD Pipelines, Unit Testing, Integration Testing, Full-stack, Full-stack Development, Architecture

Chief Technology Officer

2003 - 2007
Vortex Workforce
  • Worked with marketing and sales to target new customers.
  • Acted as product manager and main architect, defining the features and architecture for the final product.
  • Developed a Web 2.0 application that integrated Avaya's ACD to forecast call volumes and provide optimal work schedules for agents in a call center using the Monte Carlo method and linear programming techniques.
  • Managed development, operations, and support teams.
  • Negotiated product spin-out to Locaweb.
Technologies: Linear Programming, JNI, Avaya AES, PostgreSQL, MySQL, Apache Struts, Ant Design, Apache Tomcat, Spring, Java, Test-driven Development (TDD), Agile Software Development, Object-oriented Programming (OOP), CI/CD Pipelines, Unit Testing, Integration Testing, Full-stack, Architecture


2002 - 2005
Sumare College
  • Supervised undergraduate theses.
  • Taught courses on Java development, project management, web development, data structures, software engineering, and advanced topics in computer science.
Technologies: JEE, Apache Struts, Jakarta Server Pages (JSP), PMI, Java, Object-oriented Programming (OOP), Architecture

Systems Architect

2000 - 2001
  • Developed highly scalable enterprise application integration (EAI) systems to integrate billing (mainframe), inventory (SAP), CRM (Siebel), and satellite communications systems. The integrated systems were exposed to stakeholders through different channels, including web applications, IVR, and web services.
  • Designed and tested different architectures under high volume to meet pay-per-view scalability requirements.
  • Led and mentored a 20-person development team including developers, testers, and technical writers.
Technologies: IBM Rational Rose, Web Services, Siebel, SAP, Oracle Tuxedo, WebLogic, JEE, Java, XP, Test-driven Development (TDD), Agile Software Development, Object-oriented Programming (OOP), Architecture

Systems Architect

1999 - 2000
General Reinsurance
  • Developed a turnkey B2B portal to quote and sell reinsurance.
  • Interfaced with clients to determine product requirements and negotiate project schedules.
  • Managed projects for a ten-person development team.
  • Interviewed and hired new software developers for the company.
  • Designed and implemented a scalable and robust J2EE architecture using WebLogic.
  • Refactored, improved, and integrated key parts of a legacy system.
Technologies: JDBC, Jakarta Server Pages (JSP), Servlet, Sybase, WebLogic, IBM Rational Rose, Jakarta EE, Java, Object-oriented Programming (OOP), Architecture

Software Engineer

1999 - 1999
  • Developed a speech recognition application for Vodafone (known as Omnitel – Italy).
  • Gathered requirements and wrote technical documents for the software companies involved in the project.
  • Designed and implemented system modules using HDDL (a proprietary language), C++ and Oracle 8.
  • Implemented demos in Portuguese and Spanish and acted as a sales/support engineer for Latin America.
Technologies: Oracle, HDDL Plugin, C++

Software Engineer

1998 - 1999
  • Developed a college recruting website for athletes.
  • Designed the software using UML.
  • Programmed in PERL, Java, and HTML.
  • Trained other team members in object-oriented programming and Java.
Technologies: HTML, Perl, Java

Software Engineer

1996 - 1998
Hast Technologies
  • Designed and developed several modules of a business process control and decision support system for a paper factory.
  • Gathered requirements using CRC techniques.
  • Designed software using Rational Rose and ErWin.
  • Coordinated a four-person development and QA team.
Technologies: JDBC, IBM Informix, Erwin, Java, IBM Rational Rose, Delphi

Gimbal Integrated Mobile Advertising Platform
I migrated parts of the back-end from RoR to Scala/Java to improve performance and scalability and worked on the data platform and integrations with OpenX, Smaato, Pubmatic, and AdX

Locaweb Virtual PABX
This is Locaweb's virtual private automatic branch exchange (PABX) website, for which I designed the architecture and integrated Vortex Workforce software. The software was built using Java and Spring with Asterisk. It was integrated with Locaweb's infrastructure.

General Reinsurance B2B Portal

This is the current version of the site, for which I led the first development and launch in 1999.


Python, Java, Scala, Go, Swift, HTML5, HTML, Delphi, Pascal, PHP, C, C++, Perl, JavaScript


Apache Struts 2, Apache Struts, Spring, JUnit, Hibernate, Play Framework, ASP.NET, Spring Boot, Play, Jakarta Server Pages (JSP), Ant Design, Apache Velocity, JNI, Spark, Ruby on Rails (RoR), Akka, Hadoop, Apache Spark, Rational Unified Process (RUP), Django, Angular


Eclipse IDE, Apache Maven, Apache Ant, Jira, Confluence, Git, Asterisk, Subversion (SVN), Apache Tomcat, SugarCRM, Avaya AES, Oracle Tuxedo, IBM Rational Rose, Servlet, Erwin, Jetty, IntelliJ, RabbitMQ, Amazon Elastic Container Service (Amazon ECS), Amazon Simple Queue Service (SQS), SBT, GoLand, PyCharm, Terraform


Object-oriented Programming (OOP), Test-driven Development (TDD), Agile Software Development, Functional Programming, Concurrent Programming, XP, Unit Testing, Microservices, Linear Programming, Scrum, Management, Extreme Programming


Linux, Windows, Amazon Web Services (AWS), NetBeans, Oracle, JEE, WordPress, Joomla, Jakarta EE, JBoss, Heroku, Apache Kafka, OS X, Docker, Kubernetes, Azure


OAuth, log4j, Apache Commons, Integration Testing, Caching, Architecture, APIs, CI/CD Pipelines, Full-stack, Full-stack Development, Ajax, PMI, WebLogic, SAP, Siebel, Web Services, HDDL Plugin, Engineering, Electronics, Monte Carlo Simulations, Payment APIs, Card Payments, PCI, HubSpot


MySQL, Memcached, PostgreSQL, Sybase, IBM Informix, Redis, MongoDB, Elasticsearch, Amazon S3 (AWS S3), Google Cloud


JDBC, RESTEasy, Spark Streaming, Twitter API, LinkedIn API, Google API, Facebook API, Pandas, Asterisk-Java, React

2006 - 2011

PhD in Software Engineering

University of São Paulo - Sao Paulo, Brazil

2002 - 2004

Master's Degree in Software Engineering

University of São Paulo - Sao Paulo, Brazil

1991 - 1995

Bachelor's Degree in Electronic Engineering

Aeronautics Institute of Technology (ITA) - Sao Jose dos Campos, Brazil