Kerollos Magdy
Egypt
Summary
🤩
Rockstar🎓
Top SchoolKerollos Magdy is a results-driven software engineer with 8 years of experience building APIs, improving test coverage, and optimizing cloud and runtime performance across fintech, healthcare, and AI platforms. He has shipped production features at Microsoft’s AI & Search Platform—improving runtime performance, security posture, and build pipeline times—and led backend work for Egypt’s leading FinTech product at Klivvr. His freelance work includes architecting Google Cloud Healthcare API integrations for medical imaging and consumer-facing restaurant APIs that drove measurable business impact. An active open-source contributor, he has improved TypeScript type safety in the high-profile DefinitelyTyped repository and modernized Java tests across Exercism exercises. Known for turning messy legacy code into well-documented, testable systems, he also mentors junior engineers and accelerates onboarding through clearer docs. Based in Egypt, he blends pragmatic engineering with a focus on developer experience and secure, high-quality delivery.
8 years of coding experience
4 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Suez Canal University
Stackoverflow
350reputation
5kreached
8answers
8questions
Github Skills (22)
mongoose10
npm10
typescript10
typescript-definitions10
assertj10
java10
javas10
junit10
typescript-types10
typescripts10
testing9
static-typing9
type-definition9
strong-typing9
optional-typing9
Programming languages (54)
Github contributions (5)
DefinitelyTyped/DefinitelyTyped
Aug 2019 - Sep 2020
The repository for high quality TypeScript type definitions.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 reviews, 5 commits, 6 PRs in 1 year 1 month
Contributions summary:Kerollos primarily contributed to the type definitions within the DefinitelyTyped repository, focusing on enhancing the accuracy and completeness of TypeScript declarations for various libraries, including mongoose and hapi__joi. They fixed typos, added type definitions for query parameters, introduced custom paginate options, and incorporated new definitions for the mongoose-id-validator library. Their contributions improved type safety and developer experience for projects utilizing these libraries.
typescript-definitionstype-definitionshigh-qualitydtsdefinitions
exercism/java
Oct 2022 - Nov 2022
Exercism exercises in Java.
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:1 review, 8 commits, 10 PRs in 23 days
Contributions summary:Kerollos primarily contributed to improving the quality and reliability of the exercism/java repository. Their commits focused on converting existing JUnit exception assertions to AssertJ, a more fluent and readable testing library. This involved refactoring test code across multiple exercises, including series, change calculator, collatz-conjecture, dominoes, variable-length-quantity, wordy, perfect-numbers, largest-series-product, circular-buffer, and go-counting, by updating assertions for exception handling.
javaexercismexercism-exercisesexercism-trackcommunity-contributions-accepted
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