Leonardo Wolter
Staff Software Engineer at Kiwify
São Paulo, Brazil
Summary
👤
Senior🎓
Top SchoolLeonardo Wolter is a Staff Software Engineer based in São Paulo with 14 years of experience building backend systems and production-grade ML platforms for e-commerce. He led the design and implementation of an in-house ML productization stack using Airflow, MLflow, Kubernetes and AWS SageMaker to power recommendations, categorization and product-creation automation. Transitioning from senior backend engineer to data scientist and ML engineer, he blends strong mathematical foundations with pragmatic software craftsmanship to ship models into production. His open-source contributions to Java web frameworks and a Q&A engine reflect a long-standing focus on backend architecture, serialization, and core service features. Colleagues know him for turning research-level models into reliable services that materially improve customer experience. He combines hands-on coding, platform thinking and a learner’s mindset—evident from an MBA in Big Data/Data Science and continued community contributions.
14 years of coding experience
12 years of employment as a software developer
Fédération Internationale de l'Art PhotographiqueTechnician, Web development, Technician, Web development at FITO
English, Japanese, Portuguese
Stackoverflow
108reputation
2kreached
1answer
1question
Github Skills (22)
mvc-framework10
rails-i18n10
back-end-development10
authentication10
user-authentication10
java10
javas10
ember-i18n10
i18n-js10
xstream10
json-serialization10
web-application9
spring-boot9
jtest9
junit9
Programming languages (7)
Github contributions (5)
caelum/mamute
Jan 2013 - Aug 2015
Q&A Engine
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1201 commits, 10 PRs, 11 pushes in 2 years 6 months
Contributions summary:Leonardo primarily contributed to the backend of the "Q&A Engine" repository. Their commits demonstrate the implementation of core functionalities, including features like answer models, user authentication/registration, and moderation of posts. The user also integrated comments. Their contributions show a focus on building and modifying the system's core components.
caelum/vraptor
Nov 2012 - Feb 2013
Simple Java Web MVC Framework
Role in this project:Back-end Developer
Back-end DeveloperContributions:8 commits in 3 months
Contributions summary:Leonardo contributed to the core functionality of the Vaadin Raptor framework by implementing and refactoring features related to JSON serialization, specifically for i18n messages. The commits involve changes to `I18nMessageSerialization`, `XStreamJSONSerialization` and `Results` classes, demonstrating the modification of the serialization process, including changes related to how messages are rendered. They also modified tests to reflect those changes and introduced a new way to use the `message` alias for serialization.
java-webrestfulframeworkweb-mvcmvc
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