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Laurentiu Chircan l4aaa

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l4aaa/README.md

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💼 Current

Software Engineering Intern @ IBM (Jun. 2026 – Present)

  • Collaborating in a remote team of 3 to build AutoMinutes, an AI-driven platform turning raw meeting transcripts into structured summaries and actionable trackers.
  • Owning the Spring Boot backend and LLM integration layer, parsing unstructured model outputs into deterministic JSON records in PostgreSQL.

Cybersecurity Consultant & Participant @ Google Cybersecurity Seminars (Jan. 2026 – Present)

  • Completed intensive training covering network defense, web application auditing, and SOC operations.
  • Partnering to deliver pro-bono vulnerability assessments for local SMEs, currently executing wireless penetration tests and black-box web testing for live clients.

 About

I'm a Computer Science student who enjoys building systems from the ground up—from AI-powered parking platforms and SAT solvers to custom physics engines.

My interests center around backend engineering, systems programming, and offensive security. I enjoy understanding how software works beneath the surface, whether that's implementing CDCL from scratch, auditing web applications, or engineering cryptographic exploits under strict on-site constraints.

  • 🎓 BSc Computer Science (English) — West University of Timișoara (Oct. 2024 – Expected 2027)
  • 🔐 Google Cybersecurity Seminars — Selected participant, providing live vulnerability assessments & wireless pentesting
  • ⚡ Outside of code: JDM cars, sim racing, hardware tinkering

🚀 Current Focus

  • Developing AutoMinutes and managing LLM integration layers at IBM
  • Executing black-box web application testing and wireless pentesting for local SMEs
  • Competing in on-site and global jeopardy-style CTF competitions
  • Designing robust full-stack applications with modern Java (21) and React

 Achievements



Co-built Parkie in a team of 5 over a 48-hour window. Personally owned the FastAPI backend, YOLOv11 slot matching logic, and live operator dashboard.



Community Problem Track · Mar 2026



Ranked 11th out of 30 teams (Senior Category) in an intense, 8-hour on-site CTF without AI tools. Engineered exploits for PHP code injection, Known Plaintext Attacks, and JWT forgery.



ZeroDay CTF · May 2026



Exploited JWT forgery vulnerabilities and e-commerce business logic flaws while automating attack workflows with custom Python scripts across Web, Crypto, and Steganography fields.



Ranked 101 / 350 Teams · Feb 2026


 Featured Projects

🅿️ Parkie

AI-powered smart parking platform with real-time occupancy detection. Camera feeds are processed using YOLOv11, mapped to parking polygons via a FastAPI backend, and synchronized seamlessly to a React Native (Expo) mobile application and a live Vite + React operator dashboard via Supabase Realtime.


🎮 LevelUp

Full-stack gamified learning platform featuring a Spring Boot REST API secured with Spring Security and stateless JWT authentication, PostgreSQL pessimistic locking to ensure consistency for concurrent XP updates, and a responsive React 19 + Tailwind CSS frontend using Axios interceptors for automatic token refresh.


🧠 SAT Solvers

Implemented four Boolean satisfiability algorithms in C++17, culminating in a CDCL solver with 1-UIP conflict analysis, non-chronological backtracking, and VSIDS-inspired heuristics, achieving up to 150,000× speedups over the project's brute-force baseline on benchmark SAT instances.


⚙️ Physics Sandbox

Interactive 2D rigid-body physics engine featuring angular dynamics, OBB + SAT narrow-phase collision detection, grid-based broad-phase spatial partitioning, and realistic impulse-based object interaction.


  SFML   SAT   Euler Integration

 Tech Stack

Languages & Systems



Featuring Java 21, C/C++, TypeScript, Python, SQL (PostgreSQL), Bash

Frameworks, Frontend & Mobile



Spring Boot, FastAPI, React, React Native (Expo), Tailwind, OpenCV

Databases, DevOps & Cloud



PostgreSQL, Supabase, Docker

Developer Tools



Git, GitHub, Linux/UNIX, CMake, Postman, Vite

Cybersecurity Toolkit → Wireless Security Testing • Web Exploitation • PHP Code Injection • Known Plaintext Attacks • JWT Forgery • SOC Operations


 GitHub Stats




Timișoara, Romania 🇷🇴

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  1. bisquitew/Parkie bisquitew/Parkie Public

    Parkie is an AI-powered smart parking solution designed to eliminate the guesswork of finding a parking spot by providing real-time availability updates.

    TypeScript 5

  2. LevelUP-backend LevelUP-backend Public

    ☕ The high-performance REST API for LevelUp, a gamified learning platform. Built with Java 21 and Spring Boot 4, featuring asynchronous task verification, JWT security, and a complex XP/achievement…

    Java 1

  3. LevelUP-frontend LevelUP-frontend Public

    ⚛️ The immersive, gamified frontend for LevelUp. Built with React 19, TypeScript, and Vite, featuring a sleek Tailwind CSS UI (Catppuccin theme), real-time XP tracking, and interactive quest manage…

    TypeScript 1

  4. classical-SAT-solving-algorithms classical-SAT-solving-algorithms Public

    A high-performance C++17 benchmarking suite comparing classical SAT solving algorithms (CDCL, DPLL, Davis-Putnam, Resolution). Includes a custom DIMACS CNF generator in Python and comprehensive per…

    C++ 1

  5. electronic-wallet-system electronic-wallet-system Public

    A C++17 electronic wallet simulation featuring dual console applications for card management and remote transactions. Supports P2P transfers, persistent CSV storage, and transaction logging.

    C++ 1

  6. Interactive-Physics-Sandbox Interactive-Physics-Sandbox Public

    An interactive 2D physics playground in C++ featuring real-time momentum-based dragging, AABB collision resolution, and Euler integration.

    C++

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