Dayanne Fernandes - Co-Founder at ReOpenly

Dayanne Fernandes

Co-Founder at ReOpenly

Rio de Janeiro, Brazil

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Summary

🤩

Rockstar

🎓

Top School

Dayanne Fernandes is a versatile software engineer with over a decade of experience building web applications, AI systems, data science platforms and robotics software from Rio de Janeiro. She has shipped production ML and MLOps tooling at LandingAI and contributed to AI and video/IoT solutions for major organizations including Banco do Brasil and the IAEA, where she prototyped an OCR system that recovered decades of handwritten crop irradiation reports. Comfortable across the full stack, Dayanne has hands-on expertise in backend bytecode work and native GUI toolkits—she made notable contributions to the BeeWare Toga GUI and the voc Python-to-Java transpiler. Her background blends applied research (autonomous cars, biomedical robotics, fog computing) with startup and enterprise delivery, including integrations for YC-backed bxblue. A former GSoC mentee who moved Tkinter UIs to native toolkits, she pairs academic rigor in computing theory with pragmatic system design and a knack for bridging hardware, cloud and user-facing interfaces.

11 years of coding experience

11 years of employment as a software developer

Bachelor’s Degree, Computer Science, Bachelor’s Degree, Computer Science at Universidade de Brasília

Portuguese, English, Spanish, Japanese

Github Skills (12)

javas10

web-widgets10

front-end-development10

python10

widgets10

bytecode10

codegen10

java10

cocoa10

objective-c9

testing8

datatypes8

Programming languages (14)

C#PowerShellCSSC++RustCMakefileHTML

Github contributions (5)

beeware/toga

Mar 2017 - Aug 2017

A Python native, OS native GUI toolkit.

Role in this project:

Full-stack Developer

Contributions:54 commits, 24 PRs, 22 comments in 5 months

Contributions summary:Dayanne contributed significantly to the Toga GUI toolkit by implementing and improving the Cocoa backend. Their work included adding functionality to widgets, specifically the Button and MultiLineTextInput. They also worked on integrating the tree widget with the Cocoa backend, enhancing the overall usability of the toolkit and improving the window handling capabilities. Furthermore, the user added and modified internal elements, like color constants, to improve the toolkit.

gui-toolkitpythongui

beeware/voc

Oct 2017 - Oct 2017

A transpiler that converts Python code into Java bytecode

Role in this project:

Back-end Developer

Contributions:13 commits, 4 PRs, 1 comment in 3 days

Contributions summary:Dayanne contributed to the `voc` repository by implementing several methods related to byte and byte array operations within the Java bytecode generation process. Their work included adding `isalpha`, `isdigit`, `upper`, and `isspace` methods for `bytes` and `bytearray` datatypes, along with tests for these functionalities. These changes suggest an emphasis on expanding the functionality of the bytecode compiler related to Python's built-in types.

java-bytecodepythontranspiler

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