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william-dan/README.md

Hi, I’m William 👋

Security-minded Software Engineer • Product Security / AppSec / DevSecOps • Switzerland 🇨🇭

LinkedIn arXiv Email

Focus

  • 🔐 Software supply chain security & secure SDLC (CBOM / dependency & crypto usage transparency)
  • 🧰 Practical security tooling: Linux, Docker, Nginx, OAuth2/JWT, pentest toolchain
  • 🛰️ Interests: SOC/MDR workflows, virtualization security, OWASP web/API risks
  • 🧱 Strong systems foundation: OS / compilers / networking — useful for building and securing real systems

Featured projects (pinned)

Publications & competitions

  • 📄 When Gradient Optimization Is Not Enough: Dispersive and Anchoring Geometric Regularizer for Multimodal Learning — arXiv:2601.21670
    https://arxiv.org/abs/2601.21670
  • 🏆 ICPC SWERC 2025 — selected to represent University of Bern (team contest)
  • 🏆 Huawei BiSheng Cup (National Compiler Design Competition) — optimizing compiler in C++ targeting ARM

Tech snapshot

Security / Platform: AppSec • DevSecOps • OAuth2/JWT • Linux • Docker • Nginx • (runtime tracing) eBPF/bpftrace
Systems: C/C++ • compilers/tooling • networking • performance mindset
Backend / Data: TypeScript/Node.js • REST • MQTT • MongoDB • InfluxDB • testing (Jest)
ML (selective): PyTorch • RL (Gymnasium / PPO)

Open to opportunities

I’m currently looking for Product Security / Application Security / DevSecOps roles in Switzerland.
Languages: English (C1), German (B2), Chinese (native).

GitHub stats (optional)

GitHub Stats Top Languages

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  1. SEG-UNIBE/DynamicCBOM SEG-UNIBE/DynamicCBOM Public

    Runtime Cryptography Bill of Materials (CBOM) extraction via eBPF/bpftrace, generating CycloneDX 1.6 CBOMs and evaluation charts for OpenSSL-based apps.

    Python 1

  2. LingoDB-CSE LingoDB-CSE Public

    LingoDB-CSE is a research prototype for multi-query optimization via common sub-join elimination and hash multi-map reuse across RelAlg/SubOp, with batch SQL compilation and thesis-backed speedups.

    C++

  3. SysY2022-ARMv7-Compiler SysY2022-ARMv7-Compiler Public

    An optimizing compiler for the SysY2022 language that targets 32-bit ARMv7 assembly. It features a full front end (lexer/parser, AST, semantic analysis), an MIR+SSA-based middle end with classic op…

    C++

  4. ASE2024-Yellow/thingy-api-Yellow ASE2024-Yellow/thingy-api-Yellow Public

    Backend API for the Smart Mobility Bike Accident Detection system (Thingy:91).

    TypeScript

  5. rl-elevator rl-elevator Public

    Event‑driven elevator dispatch Gymnasium environment with FIFO/LOOK baselines, RL agents, and visualization/analysis from a full course project.

    Jupyter Notebook 1

  6. swiss/e-collecting-hackathon-team9 swiss/e-collecting-hackathon-team9 Public

    Work Space for Team 9 @ E-Collecting Hackathon 2025

    Python