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Etoile-Bleu/README.md

Mathéo Delbarre

Systems / Compiler / Backend Engineer

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Third-year computer science student at EPITECH Nancy, focused on low-level systems, compilers, and backend engineering. I build offline-first software for places the industry usually skips, and I specialize in LLVM infrastructure, runtime environments, and performance optimization.

Looking for a part-time position: 2 days/week (Thu-Fri), Sep 13 2026 to Mar 1 2027.

Interests

Cybersecurity • Compilers • Runtime Systems • Distributed Systems • Rendering Pipelines

Stack

Rust C++ C LLVM Linux Docker


Selected Projects

Offline-first sync engine for clinics that run on 2G and lose power mid-transfer.

  • WAL replication with Hybrid Logical Clocks and Version Vectors for exact delta sync, zero re-transmission.
  • mTLS identity and ChaCha20-Poly1305 encryption at rest, under 10 MB of RAM on a Raspberry Pi.
  • Built for district health clinics in Bhutan. Read the write-up.

Offline medication interaction checker for medical workers with no internet access.

  • One static Rust binary, one database file, every lookup fully local, sub-5ms.
  • Zero false negative policy, no silent correction of drug names.
  • Built for war zones, refugee camps, and rural clinics. Read the write-up.

LLVM-backed compiled programming language written in C++.

  • Custom front-end, parser, and static type system.
  • LLVM IR generation pipeline supporting both JIT and AOT execution.

Professional Experience

Software Engineering Intern @ AT7 Système (Aug-Dec 2025): ported a 25-year-old internal WinDev system to the web for technicians on a locked-down industrial site, working around a vendor API that was throttled on purpose. Read the write-up.

Security & Achievements

  • Top 5 / 90 - Binary Exploitation CTF (EPITECH): stack/heap overflows, GOT overwrites, ROP-style chains, reverse engineering against custom Linux binaries.
  • Top 7 / 149 - OWASP Juice Shop (inter-campus): 119 challenges solved, spanning XSS, SQLi, broken access control, crypto, and business-logic flaws.

Contributions

Contribution Graph

Pinned Loading

  1. ZamSync ZamSync Public

    Resilient offline-first sync engine -- WAL replication with Hybrid Logical Clocks, Version Vectors, mTLS, and ChaCha20-Poly1305 encryption at rest. Built for intermittent-connectivity deployments (…

    Rust 65 9

  2. MenSung MenSung Public

    Offline medication interaction checker for humanitarian medical workers. Medical Shield.

    Rust 4