Open to opportunities

TAHALLA MOHAMMED

@tahallamohammed

Systems engineer focused on C/C++ and OS internals, plus Java/Spring Boot backend development and research-driven infrastructure.

Morocco

Message

What I'm looking for

I’m looking to contribute to systems and infrastructure research—bringing strong OS internals and C/C++ foundations, plus secure Java/Spring Boot backends and Docker-based deployment, in a hands-on team that values performance, correctness, and continuous learning.

I’m a systems engineer with strong foundations in low-level C/C++ and OS internals, built through the 42 Network curriculum and peer-reviewed projects. Alongside that, I’m pursuing a Master in Software Quality and continuing hands-on work across UNIX, processes, memory management, and algorithms.

I also develop backend services in Java with Spring Boot and Spring Security, including JWT and OAuth2-secured REST APIs. I’ve built systems like a secure ticketing backend and an AI-Powered Healthcare Platform (RAG Medical Assistant) with a team workflow, database schema work, and Dockerized deployment for consistent environments.

My systems mindset is reinforced by performance and correctness-focused projects: an HTTP/1.1 server with non-blocking I/O that sustained 100+ concurrent connections, a Unix shell validated against bash across 500+ edge cases, and a deadlock-free thread scheduling model for Dining Philosophers. I’m also actively practicing algorithms on LeetCode and exploring introductory AI/ML with Scikit-learn, XGBoost, and Streamlit—motivated by contributing to systems and infrastructure research at Oracle Labs.

Experience

Work history, roles, and key accomplishments

Current

Peer Evaluator

Current

42 Network

Jan 2023 - Present (3 years 6 months)

Conducted technical code reviews across systems, operating systems, and algorithms projects. Evaluated peer submissions with a focus on correctness and implementation quality.

Code Review Systems Programming Operating System Algorithms

UNIX Shell Runtime

42 Network

Implemented a complete Unix shell supporting pipes, redirections, heredoc, and built-in commands. Validated behavior against bash across 500+ edge cases and verified zero memory leaks using Valgrind.

C Fork and Execve Waitpid Signal Handling POSIX Heredoc Valgrind

Concurrent Resource Arbitration

42 Network

Implemented Dining Philosophers in two variants (mutex and semaphore) and eliminated data races using rigorous lock ordering. Benchmarked both models for latency and starvation resistance at scale.

C Mutexes Semaphore Dining Philosophers Deadlock Free Scheduling Concurrency Lock Ordering Benchmarking

Software Defect Prediction

Master Research

Built a basic defect classification pipeline using NASA PROMISE defect data, experimenting with multiple models and comparing results. Developed a simple Streamlit interface to visualize predictions.

Python scikit learn XGBoost Streamlit NASA PROMISE Dataset Model Comparison

Containerized Multi-Service Platform

42 Network

Architected a multi-container infrastructure with an Nginx reverse proxy, MariaDB persistent volumes, and health checks. Enabled single-command deployment using docker-compose.

Docker Docker Compose Nginx MariaDB Reverse Proxy Persistent Volumes Container Orchestration

High-Performance HTTP/1.1 Server Engine

42 Network

Engineered a fully compliant HTTP/1.1 server from scratch, including raw request parsing, virtual host routing, and a CGI pipeline using fork/execve with timeout enforcement. Built a non-blocking I/O multiplexing design using poll() to sustain 100+ concurrent connections under stress tests without blocking or resource leaks.

C++Non Blocking I O Polling CGI Fork and Execve Request Parsing