Jefferson S
Backend Software Engineer at Spotify
São Paulo, Brazil
Summary
👤
Senior🎓
Top SchoolJefferson S is a backend software engineer based in São Paulo with 13 years of hands-on experience building reliable server-side systems across finance, consultancy, and music streaming. Since 2016 he has been delivering backend solutions at Spotify, and earlier roles at ThoughtWorks and Banco Banif reflect strong foundations in engineering practices and domain diversity. He is an active contributor to well-known open-source projects like MyBatis, where he improved core object-instantiation and mapping behavior—work that touches low-level data mapping used broadly in Java applications. Comfortable with multiple tech stacks and quick to learn new ones, he combines pragmatic refactoring skills with thoughtful test coverage to make code easier to maintain. Colleagues rely on him for solving tricky integration and constructor-related mapping edge cases that often go unnoticed until production.
13 years of coding experience
13 years of employment as a software developer
Bacharel, Bacharel at Universidade Santo Amaro - UnisaCellepTécnico, Técnico at Centro Educacional e Assistencial de Pedreira
English
Github Skills (8)
mybatis-plus10
javas10
reflections10
reflection10
mybatis10
sql10
java10
testing10
Programming languages (2)
Github contributions (5)
mybatis/mybatis-3
Mar 2014 - Mar 2014
MyBatis SQL mapper framework for Java
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 commits in 1 day
Contributions summary:Jefferson contributed to the MyBatis SQL mapper framework by implementing and testing features related to object creation and constructor usage. They added test scenarios to support loading objects via constructors, even when result maps are not explicitly defined. The user refactored code and extracted methods to improve readability, while also addressing scenarios where the default constructor is unavailable. Their work involved core functionality related to object instantiation and data mapping within the MyBatis framework.
javamybatis-sqlsqlmybatis
jcsantosbr/todo-backend-spring4-java8
Aug 2014 - Jun 2019
Contributions:3 commits, 1 PR, 2 pushes in 4 years 11 months
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