Full Stack Engineer

Full Stack Engineer Job Title
Full Stack Engineer
Location
Qatar – Onsite
Duration1 Year
Working Hours8 hours per day
Job Purpose

We are looking for a highly experienced Full Stack Engineer with 10+ years of technical experience to take end‑to‑end ownership of an enterprise platform covering CRM, project and portfolio delivery, and financial workflows.

The platform is built using Microsoft SQL Server, Node.js/Express, React, and React Native and operates in a secure, on‑premise Windows environment with restricted/offline internet access.

The successful candidate will be responsible for developing and enhancing the application across the database, backend, frontend, security, and deployment layers
. This is a hands‑on generalist role requiring strong database expertise and the ability to work independently in a controlled on‑premise environment.

• Design, develop, maintain, and enhance full‑stack enterprise applications.
• Design and safely evolve Microsoft SQL Server database schemas while maintaining data integrity and audit requirements.
• Develop and maintain T‑SQL stored procedures, views, and database scripts
  .
• Create and manage sequential database migration scripts without relying on ORM or migration frameworks.
• Develop production‑grade Node.js and Express APIs
  .
• Implement RESTful APIs, JSON‑based integrations, authentication, validation, error handling, and third‑party integrations.
• Develop responsive and maintainable web applications using React and Type Script .
• Work with React hooks, API clients, server‑state management, typed forms, validation, and data visualization.
• Implement and maintain application security, including authentication, authorization, RBAC, secure coding, CORS, XSS prevention, upload validation, and secrets management.
• Perform end‑to‑end development from database and API layers through to the user interface.
• Support deployment and operational activities in an on‑premise Windows Server environment
  .
• Develop and maintain deployment scripts using Power Shell
  .
• Manage Windows services, scheduled tasks, firewall configuration, and application dependencies.
• Perform controlled, script‑based releases in an environment without runtime internet access.
• Ensure all dependencies and application assets are vetted and bundled appropriately before deployment.
• Troubleshoot application, database, deployment, and performance issues.
• Contribute to performance optimization, maintainability, reliability, and security of the platform.

• HTML, CSS, Java Script
• React / React 18
• Type Script
• Vite
• React Query / Tan Stack Query
• Typed forms and validation
• Data visualization

• Node.js
• Express.js
• Production REST API development
• API authentication and authorization
• Request validation and server‑side error handling
• Database connectivity, pooling, and timeout management
• JSON and third‑party API integrations
• GraphQL knowledge is an advantage

• Microsoft SQL Server / T‑SQL – primary competency
• Stored procedures
• Views
• Relational database design
• Database schema design and evolution
• Sequential migration scripting
• Data integrity and audit requirements
• Query optimization

• Token‑based authentication
• Password hashing
• Role‑Based Access Control (RBAC)
• Secure coding practices
• XSS prevention
• CORS
• Secure file‑upload validation
• Secrets management
• Data protection

• Windows Server
• Power Shell scripting
• Windows Services
• Windows Scheduled Tasks
• Firewall configuration
• Script‑based/manual deployments
• On‑premise and restricted/offline environments
• Docker and CI/CD experience is an advantage

• 10+ years of technical experience in designing, developing, and maintaining applications from frontend to backend.
• Strong experience with full‑stack application development.
• Strong hands‑on experience with SQL Server/T‑SQL
  .
• Experience with Node.js and Express.js
  .
• Strong experience with React and Type Script .
• Experience developing and integrating RESTful APIs.
• Experience with application security and server‑side authorization.
• Experience with on‑premise deployment and Windows‑based environments is highly desirable.
• Bachelor's degree in Computer Science, Software Engineering, Information…