Modernizing and Migrating a HR SaaS Platform from AngularJS to Angular with a Hybrid Approach

The client’s existing HR SaaS platform was built on AngularJS, which was approaching end-of-support, risking security vulnerabilities, outdated dependencies, and increased maintenance costs. The platform required modernization to keep pace with evolving technologies, ensure security, and support new features—all without disrupting ongoing operations or rewriting the entire codebase at once. Additionally, existing codebase complexities hampered development efficiency and future scalability.

A mid-sized US-based company providing cloud-based HR management and administrative services, including payroll, benefits administration, and employee support, seeking to modernize and enhance their SaaS platform.

• Develop a comprehensive migration plan from AngularJS to Angular to ensure a smooth transition without service interruptions.
• Implement a hybrid architecture supporting both AngularJS and Angular simultaneously to facilitate gradual refactoring.
• Enhance platform security by removing outdated dependencies and addressing legacy vulnerabilities.
• Improve developer efficiency and maintainability by adopting modern tools like TypeScript, CLI, and modular design practices.
• Enable ongoing development of new features in Angular while progressively migrating existing components.
• Ensure the platform remains fast, secure, user-friendly, and highly available throughout migration.
• Update project documentation to streamline future maintenance and onboarding processes.

• Parallel operation mode supporting both AngularJS and Angular frameworks using techniques like ngUpgrade.
• Automated build processes for supporting hybrid application deployment and production environments.
• Migration scripts and tools for incrementally moving core services, UI components, and shared modules to Angular.
• Implementation of a modular architecture promoting code reuse and easier maintenance.
• Integration of a secure communication protocol (SSL) for development and production environments.
• Detailed developer documentation and migration guidelines for future scaling and team onboarding.

• Backend APIs for HR data management and payroll processing
• Authentication and authorization services
• External data storage solutions
• Monitoring and security tools

• Maintain application performance with minimal downtime during migration
• Ensure platform security by eliminating outdated dependencies and vulnerabilities
• Support scalability to accommodate growing user base and data volume
• Achieve high availability with robust deployment and testing pipelines
• Ensure maintainability and ease of future feature addition

The platform modernization will enable the client to migrate their HR SaaS solution gradually, maintaining service continuity while leveraging modern technologies. The transition is expected to enhance security, reduce vulnerabilities, and improve development efficiency. Ultimately, this will enable the client to stay competitive in the HR services market by offering a more stable, secure, and flexible platform capable of supporting future growth and feature expansion.