Hi, I'm

Jesús Blázquez

CS & Mathematics student · UAM

Based in Spain

Systems programmer at heart, mathematician by training. I like software close to the hardware and easy to reason about.

Read the CV View projects

about

About

I'm a student in the Computer Science and Mathematics double degree at the Universidad Autónoma de Madrid (UAM). I write low-level C and C++, contribute to open source, and do security research.

Highlights

  • INSAIT research fellow, one of 15 students picked from 2,800+ applicants. Found a vulnerability in i2pd by fuzzing it (CVE ID [CENSORED] pending disclosure).
  • Code merged into FreeBSD: C23 floating-point functions in libm, the system math library.
  • HTTP/1.1 server from scratch in C++17, with an epoll event loop and a thread pool: 123k requests/s in benchmarks.
  • GPA 9.14/10 and an Academic Excellence Scholarship (2024).

Next: Erasmus exchange at TUM (Munich), October 2026 to August 2027.

experience

Where I've worked

  1. Summer Research Fellow · SURF 2026

    INSAIT · Sofia, Bulgaria

    June – August 2026

    One of 15 students selected from 2,800+ applicants to research the security of the I2P anonymity network.

    • Fuzzed the multi-threaded C++ i2pd codebase; diagnosed memory corruption, race conditions and leaks with GDB, Valgrind and AddressSanitizer.
    • Found a vulnerability in i2pd (CVE ID [CENSORED]); technical details [CENSORED] pending coordinated disclosure.
    • Supervised by Dr. David Basin and Ms. Nadia Markova; paper under submission (venue [CENSORED] pending review).

projects

Selected projects

Three I would show first. The rest are on their own page.

All projects (7)

  • POSTHaste HTTP server

    A zero-dependency HTTP/1.1 server written from scratch in C++17, benchmarked at 123k requests/s.

    • C++17
    • epoll
    • Lock-Free
    • Networking

    SourceWrite-up

  • merged upstream

    FreeBSD libm contributions

    C23 floating-point functions merged upstream into FreeBSD's system math library.

    • C
    • FreeBSD
    • IEEE 754
    • Open Source

    Commits

  • pending disclosure

    i2pd vulnerability research

    Found a vulnerability in i2pd (CVE ID [CENSORED]) by fuzzing it during my INSAIT research fellowship.

    • I2P
    • C++
    • Fuzzing
    • Security Research

education

Studies & awards

  1. Expected 2028

    Double Degree in Computer Science and Mathematics

    Universidad Autónoma de Madrid

    GPA 9.14/10. Distinctions in Computer Architecture (2026) and Data Structures (2024).

    Courses: Operating Systems · Computer Architecture · Algorithm Design · Networks · Numerical Analysis · Linear Algebra

  2. Oct 2026 – Aug 2027

    Erasmus Exchange in Computer Science

    Technical University of Munich (TUM)

    Planned courses: Computer Systems, High Performance Computing, Cybersecurity, Artificial Intelligence.

  3. April 2026

    Sino-Euro Spring School 2026

    Northwestern Polytechnical University (NPU)

    Selected by GPA for a 10-day program at NPU in Xi'an, with a course on the foundations and applications of large language models.

  4. 2024

    Academic Excellence Scholarship award

    Awarded by the Community of Madrid and UAM to the students with the highest grades.

  5. 2013 – 2023

    Professional Degree in Music (Oboe)

    Conservatorio Tomás de Torrejón y Velasco

    Ten years of conservatory training in oboe.

  6. 2018

    Regional Mathematical Olympiads award

    Silver medal (Albacete) and bronze medal (Castilla-La Mancha).

git log --author=jesus

Writing

All posts
  1. Building a C++17 HTTP Server with Linux epoll#C++#Networking#epoll

contact

Contact

If you want to talk about systems programming, security research, or open source, email me. I'm also on Libera.Chat.

jesuscblazquez@gmail.com
IRC
rotten_egg on Libera.Chat
PGP
1BC8 3469 6F33 43B0 7B8C 260C 549B 97A5 8FB2 EBB4 public key

Good to know

What are you looking for?
Opportunities in systems engineering and security research.
How should I reach you securely?
Email me and encrypt with the PGP key above. The fingerprint is listed so you can verify it out of band.