Athletics Projects Resume
These photos was taken during my exchange semester at UBC, while hiking in the Rockies.
Profile

Hi, I'm Yehonatan

CS student • Software Engineer • Athlete

About me

I'm a Computer Science student at the Hebrew University of Jerusalem with a strong passion for both technology and athletics. Before my studies, I served as Deputy Commander of a Shaldag-class Warship in the Israeli Navy, where I gained leadership and operational experience under pressure.

I have a strong foundation in software engineering and I love building products end-to-end. This year, I completed a semester at the University of British Columbia (UBC) in Vancouver, Canada, as part of a student exchange program.

In addition to my studies, I am a competitive long-distance & XC runner and coach. I revived the Hebrew University’s running team and continue to lead it today. As an athlete, I placed third in the 5k road Israeli National Championships 2025 and was part of the team that won the Canadian Cross Country National Championship.

• Experienced with Python, C, C++, Java, Bash and more.
• Particularly interested in low-level systems, cybersecurity, AI, and ML.

My Athletic Journey

My journey as a middle-distance runner and coach.

Explore my projects

A collection of personal and academic projects.

My resume

Curious to know me better? Explore my story, experience, and passions in detail.

Selected Projects

Secure VPN (Python)

Engineered a secure VPN between client and server using Diffie–Hellman key exchange and AES-CBC encryption with HMAC authentication. The system mitigates man-in-the-middle, delay, and replay attacks, ensuring confidentiality, integrity, and reliable communication.

User-Level Thread Library (C++)

Implemented a user-level threading library in C++ with preemptive round-robin scheduling, custom thread control blocks (TCBs), and manual context switching via sigsetjmp/siglongjmp. Supports thread creation, initialization, sleep, blocking, resuming, and safe termination - all in user space without kernel involvement.

Job Scanner (Python)

Built a job aggregation tool that pulls listings from multiple APIs, including a non-documented Airtable source (Goonzile). Parsed hidden URLs and dynamic headers from HTML and JavaScript to access raw data. This module is part of a broader platform that matches resumes to job descriptions and helps users tailor their applications.

Technical Skills

Languages

  • Python
  • C/C++
  • Java
  • Bash
  • SQL
  • HTML, CSS, JavaScript (basic)

CS Fundamentals

  • Data structures, algorithms
  • operating systems, concurrency
  • OOP & design principles
  • Databases & SQL, basic cryptography

Network & Cybersecurity

  • AES-128/256, ChaCha20, RSA, ECC
  • CBC, CTR, ECB (avoid)
  • DH/ECDH, RSA key transport
  • TLS, HTTPS, SSH, IPsec
  • TCP, UDP

Machine Learning

  • scikit-learn, NumPy, pandas, matplotlib
  • Random Forest, AdaBoost, SVM, KNN, Logistic Regression
  • PCA, DBSCAN.
  • Data preprocessing & experiment design

Operating Systems

  • Threads, Processes, Scheduling
  • Mutexes, Semaphores, Condition Variables
  • Kernel vs User Space, System Calls
  • Virtual Memory, Paging
  • Pipes, Sockets, Shared Memory, Signals

Resume

Education

Hebrew University of Jerusalem

Computer Science, BSc • 2022-present • GPA: 88

Final-year student with focus on systems programming, low-level systems, and cryptography.

University of British Columbia (UBC)

Exchange Semester • 2024

Computer Science exchange program in Vancouver, Canada.

Experience

Instructor, Mamriot Cyber Program

2025 – Present

Provided mentorship to high school students in computer science and cybersecurity fundamentals.

Led educational sessions and guided student projects as part of Israel's elite national tech initiative.

Military Service

Israeli Navy - Deputy Commander, Shaldag-class warship

Led crew operations on a SHALDAG fast patrol boat with responsibility for real-time decision-making, safety, and mission execution. Gained hands-on leadership, teamwork, and high-pressure operational experience.