Rafael Saback
Member Of Technical Staff at OpenAI
Warsaw, Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolRafael Saback is a results-driven frontend engineer with 11 years of experience building high-quality web applications and leading squads, currently a Member of Technical Staff at OpenAI after senior and staff frontend roles at Neptune.ai. He combines deep frontend expertise in React and TypeScript with full-stack experience—having built backend entities and APIs end-to-end at Rollup—and a background in performance optimization and mentoring. Rafael’s career spans fintech at Goldman Sachs, ML-focused tooling, and early robotics research where he developed control systems and published work on fault-tolerant MPC, demonstrating strong analytical and systems thinking. He contributes to open-source front-end projects such as a React ePub reader, improving UX, mobile responsiveness, and TypeScript typings. Based in Warsaw, he brings a rare mix of rigorous engineering from embedded C++ robotics to scalable web UIs, favoring pragmatic, maintainable solutions that bridge research and product.
11 years of coding experience
12 years of employment as a software developer
Industrial Engineering Ingeniería Industrial, Industrial Engineering Ingeniería Industrial at Universidad de CantabriaMaster's degree Industrial Control and Automation, Master's degree Industrial Control and Automation at Universidade Federal da BahiaAutomation and Control Specialization Underwater Vehicles Control, Automation and Control Specialization Underwater Vehicles Control at Senai-Cimatec
Portuguese, English, Spanish, Polish
Stackoverflow
21reputation
168reached
1answer
1question
Github Skills (9)
javascript10
react10
css9
typescripts8
typescript8
typescript-types8
ui-design7
html6
ionic6
Programming languages (7)
Github contributions (5)
gerhardsletten/react-reader
Sep 2020 - Sep 2020
An ePub-reader for React, powered by Epub.js
Role in this project:
Front-end Developer
Front-end DeveloperContributions:7 commits, 6 PRs, 1 comment in 7 days
Contributions summary:Rafael primarily contributed to the front-end development of an ePub reader built with React. They focused on enhancing the user interface by fixing typos, adding features like text selection and a cursor to the table of contents button, and improving the responsiveness of the reader on mobile devices. Furthermore, the user added type definitions for components and styles to improve code maintainability and readability.
reactepub-readerviewerreaderepub
rafaelsaback/salary-comparison-by-city
Jan 2019 - Jun 2022
A calculator to compare the salaries in different cities by taking into account Numbeo's cost. (JavaScript, Sass, React) of living index.
Contributions:21 PRs, 40 pushes, 22 branches in 3 years 5 months
react-sassreactsassindexcss
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