Leandro Alfonzo
Senior Backend Engineer at Addi
Medellín, Antioquia, Colombia
Summary
👤
Senior🎓
Top SchoolLeandro Alfonzo is a Senior Backend Engineer based in Medellín with 11 years of experience building resilient, scalable backend systems and leading engineering teams. He progressed from electronics engineering into software, bringing hardware-minded rigor to system design, integration, and automation across startups and consulting firms. Leandro has held technical leadership roles including Development Team Lead at EPAM and CTO/Tech Lead at FinMaq, and now contributes at Addi where he focuses on backend architecture and delivery. An active open-source contributor, he has made substantive contributions to the well-known ZIO Scala library—implementing and testing core async traversal logic and improving code quality via scalafmt. He combines hands-on coding, QA sensibility, and team coaching to drive reliable production services and stronger engineering practices. Colleagues describe him as a pragmatic problem-solver who translates complex integration requirements into maintainable solutions.
10 years of coding experience
13 years of employment as a software developer
Bachelor of Engineering (B.Eng.), Electronics, Bachelor of Engineering (B.Eng.), Electronics at Universidad Simón Bolívar
Spanish, English
Github Skills (10)
testing10
asynchronous10
zio10
functional-programming10
io10
async10
concurrency10
scala10
scalaz9
code-formatting8
Programming languages (5)
Github contributions (5)
zio/zio
Jun 2018 - Jun 2018
ZIO — A type-safe, composable library for async and concurrent programming in Scala
Role in this project:
Back-end Developer & QA Engineer
Back-end Developer & QA EngineerContributions:7 commits, 1 PR, 8 comments in 1 day
Contributions summary:Leandro contributed primarily to the `zio/zio` project by implementing and refactoring core functionality within the ZIO library, specifically related to the `IO.traverse` function. They also added a new test suite `IOSpec` to perform testing for `IO.traverse` and other relevant code changes. The user also formatted code using `scalafmt` to maintain consistent code style throughout the project.
functional-programmingqueuesstreamsasynchronicityasync
leandrob13/Electronic-Ruminations
Apr 2021 - Nov 2024
Contributions:65 pushes, 7 branches in 3 years 7 months
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