Senior Full Stack Engineer

My client is seeking a Senior Full Stack Engineer for a 1-year onsite contract to own and evolve our core enterprise dashboard platform. Tech Stack: SQL Server (100+ tables), Node.js/Express, React + TypeScript, React Native, SAP S/4HANA & OpenText integrations. Environment: Secure, offline Windows Server environment. Key Requirements: 10+ years total experience with 5+ years as a lead/senior engineer owning production systems end-to-end. Deep expertise in T-SQL migrations, secure coding standards (OWASP ASVS), and manual Windows deployments. Location: Doha, Qatar (Onsite). Duration: 12 Months.