Backend-focused developer | Systems, APIs & automation

I am a developer from École 42 Lausanne, focused on building backend systems, APIs, infrastructure-aware applications, and practical automation tools.

I like projects that combine:

• clean backend architecture
• authentication and API security
• databases and data modeling
• Docker/Linux infrastructure
• systems programming and networking
• useful developer documentation

Currently improving my portfolio through advanced 42 projects, automation tools, and career-oriented learning resources.

A reusable Telegram expense tracker powered by Google Apps Script and Google Sheets.

Users can send messages like:

coffee 4
migros 12.50 chf
flixbus 82 euro

The bot parses the message, stores the expense, categorizes it, logs activity, and updates a Google Sheets dashboard.

Highlights

• Telegram Bot API integration
• Google Apps Script backend
• Google Sheets as storage/dashboard
• Multi-currency parsing
• User/admin permissions
• Private configuration through Script Properties
• Public template with no committed secrets
• Local development workflow using clasp

Tech: JavaScript · Google Apps Script · Google Sheets · Telegram Bot API · clasp

A structured, searchable and career-oriented guide to the 42 Advanced Curriculum.

🌐 Live website: https://nico-ry.github.io/The-Complete-42-Advanced-Curriculum-Guide/

Highlights

• 162 advanced projects documented
• 149 verified projects
• Official XP and estimated hours from 42 metadata
• Searchable JSON project database
• CLI search tools
• Generated Markdown documentation
• GitHub Pages website
• Learning paths for Backend, DevOps, Security, AI, Systems and Graphics
• Career, CV and interview-value recommendations

Tech: Python · JSON · GitHub Pages · Data processing · Documentation tooling

My personal workspace for the 42 Advanced Curriculum.

This repository will grow as I complete new projects in backend development, data science, systems, DevOps, security and AI-related topics.

Current focus

• strengthening backend and infrastructure skills
• building projects that are useful for interviews
• documenting learning paths and technical decisions
• moving from Common Core foundations toward advanced specialization

Full-stack multiplayer web application built as the final project of the 42 Common Core.

The app includes real-time multiplayer gameplay, authentication, 2FA, OAuth login, friends, presence, chat, match history, achievements, multilingual support and Dockerized infrastructure.

My main backend contributions

• JWT authentication with HTTP-only cookies
• global API guard and public-route system
• 42 OAuth login flow
• TOTP-based two-factor authentication
• friends system API
• realtime friends/presence synchronization
• Swagger/OpenAPI documentation
• backend error handling and API protection

Observability branch

• Added Prometheus metrics endpoint
• Integrated prom-client
• Exposed backend metrics for Grafana/Prometheus experiments
• Used as interview preparation for monitoring and reliability topics

Tech: NestJS · TypeScript · PostgreSQL · Prisma · Docker · Nginx · Socket.IO · JWT · OAuth2 · 2FA · Prometheus · Grafana

HTTP/1.1 server built in C++.

Highlights

• non-blocking server architecture
• poll()-based I/O multiplexing
• request parsing
• routing
• file uploads
• CGI execution
• concurrent client handling
• low-level networking concepts

Tech: C++ · Sockets · HTTP · Linux · Networking · Concurrency

Repository containing my 42 Common Core projects.

The Common Core gave me strong foundations in:

• C programming
• memory management
• Unix processes
• file descriptors
• networking
• algorithms
• graphics
• concurrency
• shell behavior
• Docker and infrastructure basics
• full-stack final project development

Backend

NestJS · TypeScript · REST APIs · JWT · OAuth2 · 2FA · Swagger/OpenAPI

Databases

PostgreSQL · Prisma · SQL · Google Sheets as lightweight storage

Infrastructure

Docker · Docker Compose · Nginx · Linux · Prometheus · Grafana

Systems

C · C++ · Unix · sockets · HTTP · processes · file descriptors · threads · mutexes

Automation & Tools

Python · JavaScript · Google Apps Script · clasp · GitHub Pages · CLI tooling

Core concepts

API security · authentication flows · concurrency · networking · observability · documentation

I am especially interested in backend and infrastructure-oriented roles where I can work on:

• API design and backend architecture
• authentication and security-sensitive flows
• database modeling
• Dockerized services
• monitoring and reliability
• developer tooling
• practical automation