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I'm a student at 42 Paris
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I'm a student at 42 Paris

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s1-haya/README.md

Hi, I'm Hayato 👋

I'm a software engineering student at 42Tokyo, preparing to continue my studies at 42Paris from September 2026.

I'm building strong fundamentals in C/C++, Linux, algorithms, networking, and backend systems through the 42 curriculum.

I also have practical experience in LLM/RAG technical validation and PoC development for an internal AI chat application in the automotive industry.

Currently, I'm improving my technical communication in English, preparing for international opportunities in France, and exploring how software engineering and AI/RAG can solve real-world problems.


What I Can Do

  • Build software from the ground up using C / C++ / Linux
  • Understand and implement low-level concepts such as processes, signals, pipes, sockets, and HTTP
  • Develop backend APIs and connect them with databases
  • Work with Docker-based development environments
  • Build and validate LLM/RAG prototypes using Python, LlamaIndex, Qdrant, PostgreSQL, and Amazon Bedrock
  • Break down technical problems, test ideas, document results, and communicate findings clearly

Featured Projects

Project Description Tech Repository
webserv HTTP/1.1 server built in C++98 with non-blocking I/O C++98, Linux, socket, epoll, HTTP/1.1 Repository
42pong A classic Pong game with authentication, real-time communication, and web application architecture Docker, Nginx, Django, Django REST Framework, WebSocket, PostgreSQL, Redis, JavaScript Repository
minishell A simple Unix shell implementation inspired by Bash behavior C, Linux, process, pipe, redirect, signal Repository
miniRT A ray tracing project with basic 3D rendering C, vector math, ray tracing, graphics Repository

Tech Stack

Languages:
C, C++, Python, JavaScript, SQL

Backend / Database:
Python APIs, REST APIs, PostgreSQL, Qdrant, WebSocket

AI / LLM / RAG:
LLM, RAG, LlamaIndex, Amazon Bedrock, Claude, MCP

System / Infrastructure:
Linux, Docker, Docker Compose, AWS EC2, Git, GitHub Actions, Nginx

Low-level / Web:
HTTP/1.1, socket, epoll, process, signal, pipe, redirect


Current Focus

  • Preparing for 42Paris
  • Improving technical communication in English
  • Reviewing 42 Common Core projects
  • Building a portfolio for internships in France
  • Exploring practical AI/RAG and backend systems

Direction

I want to become an engineer who can understand real problems, build practical software, and communicate clearly across technical and business contexts.

Long-term, I’m interested in building software products and exploring startup opportunities.

Links


Contact

I'm happy to connect with engineers, founders, recruiters, 42 students, and people interested in software engineering, AI/RAG, startups, or international tech careers.

Pinned Loading

  1. 42-pong/42-pong 42-pong/42-pong Public

    Python 2

  2. 42-ws/webserv 42-ws/webserv Public

    A simple HTTP server written in C++

    C++ 1

  3. minishell_bonus minishell_bonus Public

    C 1

  4. miniRT miniRT Public

    C