Freelance Project Opportunity – Senior Software Engineer (Madrid, Hybrid)We are looking for a Senior Software Engineer to join a 6‑month freelance project in Madrid.This is a hybrid role with regular on‑site work required.Key Skills & Experience:- Strong background in C/C++ development for embedded systems- Proficiency in Linux- Experience in software design & architecture for real‑time sensor applications- Knowledge of CI/CD processes and version control- Familiarity with SoC platforms- Ability to analyze and refactor legacy C++ code- Experience with API design & development (REST, ONVIF, CGI)- Strong knowledge of internal protocols: MQTT, serial communication, socketsLocation: Madrid (Hybrid, regular on‑site presence)Duration: 6 months freelance contract