Alexandru Apostolescu
Software Engineer at University POLITEHNICA of Bucharest
Bucharest, Romania
Summary
🤩
Rockstar🎓
Top SchoolAlexandru Apostolescu is a software engineer specializing in Kubernetes platform engineering, currently operating and automating infrastructure across 100+ clusters at UiPath. With a 5-year track record spanning observability, service mesh, cluster lifecycle, and cost optimization, he focuses on shifting operational ownership to self-service platform capabilities. His low-level systems background and contributions to the Unikraft unikernel—especially improving lib/ukrandom and adding /dev/hwrng—underscore a strong grounding in OS internals and security-conscious performance engineering. He has built full-stack network observability features and extended rule engines at Keysight, and teaches cloud and operating systems topics at the University POLITEHNICA of Bucharest. Alexandru also contributes hands-on educational OS materials (C, shell, Python examples) to open-source teaching resources, blending practical pedagogy with production-grade platform work.
5 years of coding experience
2 years of employment as a software developer
POLITEHNICA București National University for Science and Technology
Github Skills (22)
net10
c1110
ipc10
networking10
c1710
kernel10
socket10
ed2551910
randomization10
interprocess-communication10
unikernel10
tcp-socket10
operating-system10
system-programming9
python9
Programming languages (9)
Github contributions (5)
open-education-hub/operating-systems
Nov 2022 - Dec 2022
Teaching resources (OER) for Operating Systems
Role in this project:
Back-end Developer
Back-end DeveloperContributions:133 reviews, 6 commits, 39 PRs in 17 days
Contributions summary:Alexandru primarily contributes to the operating systems teaching resources by adding and modifying code examples and lecture content related to I/O devices, interprocess communication, and optimizations. These contributions involve creating C code snippets demonstrating device interaction using ioctl, shell scripts, and Python-based servers. The user also modifies Makefiles and integrates FFMPEG for video generation. Their work suggests a focus on hands-on learning examples within the operating systems domain.
openeduoperating-systemsoperating-systemteachingsystem-programming
unikraft/unikraft
Aug 2022 - Aug 2022
A next-generation cloud native kernel designed to unlock best-in-class performance, security primitives and efficiency savings.
Role in this project:Back-end Developer
Back-end DeveloperContributions:36 reviews, 1 commit, 3 PRs in 1 day
Contributions summary:Alexandru primarily contributed to the Unikraft kernel, focusing on the lib/ukrandom library. Their work involved implementing and refining random number generation functionality, including adding a /dev/hwrng device and deprecating older methods. They also addressed API cleanliness, security, and performance by seeding the PRNG with hardware randomness and fixing return values. Furthermore, the user modified related files, including those for the x86_64 and ARM64 architectures.
kernelposix-compliantvirtualizationmicroserviceposix
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