Tommaso Fontana
Research Engineer at Würth Phoenix
Milan, Lombardy, Italy
Summary
👤
Senior🎓
Top SchoolTommaso Fontana is a research engineer with nine years of experience building high-performance systems in Rust, Python, C and x86_64 assembly, currently improving performance and reliability for Zellic’s agentic auditor. He has a strong background in compilers, succinct data structures and graph-scale engineering—having implemented a high-performance Webgraph compressor for SoftwareHeritage and contributed append/from_sorted_iter features to the popular roaring-rs Rust bitset. Tommaso’s work spans reverse engineering, JIT maintenance (s390→x86_64), ML for biomedical data, and resilient integrations (Rust HTTP proxies, SOAP adapters) delivered in production contexts. An active CTF player and reverse/pwn specialist with mHackeroni (multiple DEF CON finalist appearances), he combines offensive security insight with systems-level optimization. Based in Milan, he also brings experience training engineers and automating brittle legacy systems, often finding pragmatic engineering shortcuts that preserve correctness at scale.
9 years of coding experience
3 years of employment as a software developer
University of MilanMaster's degree Computer Science and Engineering, Master's degree Computer Science and Engineering at Politecnico di MilanoDiploma Istituto Tecnico e Professionale Elettronica ed Elettrotecnica, Diploma Istituto Tecnico e Professionale Elettronica ed Elettrotecnica at ITIP L.Bucci
English
Stackoverflow
720reputation
22kreached
18answers
1question
Github Skills (20)
algorithm10
algorithms10
bitmap10
data-structure10
bitmask10
data-structures10
bitmaps10
rust10
testing9
bitset9
documentation8
bit7
multiprocessing6
bubble-sort6
queue6
Programming languages (9)
Github contributions (5)
RoaringBitmap/roaring-rs
Oct 2020 - Oct 2020
A better compressed bitset in Rust
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 reviews, 24 commits, 3 PRs in 3 days
Contributions summary:Tommaso implemented and documented new methods for the `RoaringBitmap` and `RoaringTreemap` data structures, specifically focusing on `append` and `from_sorted_iter` functionalities. They added documentation, improved test coverage, and addressed potential issues with duplicate values during `push` operations. The user's contributions centered on enhancing the library's capabilities and usability with new methods while maintaining correct behavior. They also contributed to refactoring and code formatting.
rustroaring-bitmapscompressionbitset-librarybitset
zommiommy/influx_db_sanitization_scripts
Feb 2020 - Sep 2022
Contributions:173 pushes, 1 comment in 2 years 6 months
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