Software Engineer Full Stack - Lille - Freelance (M/F)

About the role

DETAILED DESCRIPTION The Software Engineer - Full stack will contribute to the development and maintenance of our network software solutions. YOUR RESPONSIBILITIES * Architecture & Design: Define and design the architecture of robust backend and frontend components, capable of supporting large data volumes and complex business rules. * High-performance development: Participate in the development of new strategic features by writing clean, highly efficient, tested, and documented code. * Technical leadership & vision: Take an active part in defining the software strategy and long-term goals of the team. * Instill best practices through demanding code and design reviews. * Complex problem solving: Diagnose and correct structural anomalies, and provide second-level expertise to technical teams and clients during critical incidents. MAJOR PROJECTS AND SHORT-TERM CHALLENGES * Large-scale redesign and optimization: You will be involved in the evolution and global redesign of our Firewall flow lifecycle management platform. This critical system, which integrates all the complex management and security rules of a large company in the sector, requires a deep restructuring to optimize its performance and maintainability (management of complex technical debt, industrialization). * Network ecosystem automation: Design and deploy global automation solutions for our network infrastructures, going beyond isolated scripts to build true software engineering tools (Network Automation / NetDevOps). 1. Confirmed experience in Full Stack development on large-scale applications (ideally with infrastructure, network, or security issues) 2. Mastery of modern software architecture patterns (API-first, microservices, state management) 3. Knowledge of DevOps principles and mastery of CI/CD, PaaS, and monitoring tools 4. Ability to dive into complex existing systems (legacy), to understand their workings in order to simplify, redesign, and optimize them