Mohamed Hashi
Software Engineer at Facebook
North Brabant, Netherlands
Summary
👤
Senior🎓
Top SchoolMohamed Hashi is a software engineer with a decade of experience who blends a strong mathematical background (MSc in Mathematics) with practical engineering at companies like Facebook and Spreadshirt. He builds robust back-end systems and microservices in Java and contributes to performance-critical open source—most notably improving the rope data structure and benchmarks for the xi-editor Rust editor. Comfortable across many languages (Java, C#, JavaScript, Python, Haskell, OCaml, Kotlin), he is drawn to optimization problems and enjoys explaining and implementing abstract solutions. Colleagues rely on him for clear communication, code quality, and pragmatic architecture improvements across CI/CD, QA, and payment/order systems. An analytical thinker who moonlights in OSS, he brings both theoretical rigor and production-hardened delivery to distributed systems.
10 years of coding experience
4 years of employment as a software developer
Master of Science - MS Mathematics, Master of Science - MS Mathematics at Leiden UniversityBachelor of Science - BS Computer Science, Bachelor of Science - BS Computer Science at Utrecht University
Dutch, English, German, Somali
Stackoverflow
1reputation
0reached
1answer
0questions
Github Skills (10)
algorithm10
data-structures10
algorithms10
rust10
text-editing10
data-structure10
performance-optimization9
documentation8
benchmark7
java6
Programming languages (9)
Github contributions (5)
xi-editor/xi-editor
Mar 2018 - Sep 2018
A modern editor with a backend written in Rust.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:22 commits, 8 PRs, 25 comments in 5 months
Contributions summary:Mohamed primarily focused on refactoring and improving the `xi-editor/xi-editor` project's rope data structure, a key component for text editing. The contributions involved fixing bugs related to code boundaries, adding documentation, and optimizing performance through the use of `memrchr` for reverse byte lookup. The user also introduced a new tree builder method and added associated benchmarks to compare performance. These improvements enhance the efficiency and robustness of the text editor's core data handling.
rustbackendeditor
mqzry/dotfiles
Jan 2017 - Sep 2018
Contributions:40 pushes, 11 branches in 1 year 8 months
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