Jalerson Lima

Software Developer at creditshelf Aktiengesellschaft

Experienced Senior Rails Developer with 10+ years of web applications development, agile methodologies and test-driven development.

  • 10+ years’ experience in Ruby on Rails framework;
  • 10+ years of software development experience using a variety of front and back-end technologies, platforms and tools;
  • Experience on developing high-performance web applications using agile methodologies and Test-Driven Development;
  • Strong background in computer science and software engineering;
  • Solid experience working collaboratively using Git, GitHub, GitLab and BitBucket;
  • Experience using SQL and relational databases, such as MySQL and PostgreSQL;
  • Passionate for automated testing, continuous learning and improvement.


Software Developer

creditshelf Aktiengesellschaft
April 2018 - Present

Fulltime Professor of Software Engineering

Federal Institute of Education at Rio Grande do Norte

Since 2010, I’m a full-time professor of software engineering, programming, web development and computer basics at the Federal Institute of Education at Rio Grande do Norte (IFRN). In these years as a professor, I had the opportunity to teach thousands of students, conduct research and educational projects, supervise students in their projects and so on.

At the Distance Education Campus, I also work as a software developer, building applications following agile-based methodologies and TDD, to support managers, professors and other professionals in their day-by-day tasks.

March 2010 - April 2018

Senior Ruby on Rails Developer and Project Leader

Laboratory of Innovations in Healthcare

Head developer of the Telepediatrics, which is a web application developed in Ruby on Rails using Test Driven Development (TDD), as well as agile methodology principles and practices. Telepediatrics supports non-specialist doctors in pediatric appointments, allowing them to discuss cases with remote medical specialists. In these days, Telepediatrics is a complex web application, which handles sensitive and law-protected data, supporting doctors by using complex algorithms to perform statistical analysis and calculations, such as insulin therapy, Z-Score, percentiles of anthropometry measures, as well as automatic detecting issues on neurodevelopment, vaccination and so on. I also managed the team that built the Telepediatrics mobile application in Android, iOS and Windows Phone, as well as built an API to integrate our web application to our mobile app.

February 2010 - February 2017

Senior Ruby on Rails Developer

Sync Systems

Senior Ruby on Rails developer of the internal management web application of the Telepesquisa company, built in Ruby on Rails and following agile methodologies principles and practices. The application was built by me from scratch: negotiating and collecting functional requirements at client’s site. This application had to import millions of records of other partner companies. I also was the head developer of the Bluesync, which is a Bluetooth marketing software developed in Java.

2009 - 2010

Remote Systems Analyst

Symetrix Corp.

Remote Systems Analyst Consultant of the Eye of the Eagle project, which was an application to prevent tax evasion of the Rio de Janeiro government. This application was built in Java, C and C# components, handling with smart cards and RFID (Radio-frequency Identification). In this position, I had my first experience negotiating features and deadlines with the clients in English.

2008 - 2009

Java Web Developer

Brazilian Ministry of Education

I worked as web developer to build the Knowledge Connections Portal to the Secretary of Continuing Education, Literacy, Diversity and Inclusion of the Ministry of Education. The portal, developed in Mentawai (Brazilian MVC Java Framework), it was nationally used to register and monitor projects conducted by federal universities.

2007 - 2008

Softwaer Developer

Real Security

Software developer to build an Electronic Security Monitoring System used by the company. The application, built in Java, had to manage all the security signals sent by devices located in the clients houses.

2007 - 2007

PHP Web Developer

Brazilian Agency for the Aquaculture Development

Web developer of the RECARCINE Portal, which was a web-based system, built in PHP, to manage projects of the Brazilian Agency for the Aquaculture Development.

2006 - 2007


Federal University of Rio Grande do Norte

Master's degree

During 2011 to 2014, I was a Master’s degree student and researcher at the Federal University of Rio Grande do Norte. During this time, I conducted researches in Software Product Lines, Software Metrics and Productivity Assessment. I also worked as researcher of individual productivity assessment on the university’s Software Development Department, producing individual software contribution reports based on mining repository-based metrics.

2012 - 2014

Open Superior School in Brazil

Specialization's degree

Computer Science - Agile Methodologies

2008 - 2010

Federal Institute of Education at Rio Grande do Norte

Associate's degree

Computer Science - Software Development

2004 - 2007