HR Management Ecosystem

Challenge

Take ownership of an inherited HR platform used across the organization, keep daily operations stable, resolve production issues, and deliver a continuous stream of business changes without the freedom to rewrite the system from scratch.

Role & Collaboration

Alliance acquired this HR platform from a third-party provider before I joined. I maintain and extend the inherited ecosystem across its React web application, Node.js backend, React Native mobile application, and SQL Server integration, working with a project team on requested changes while also identifying and addressing technical risks that affect reliability and security.

Solution

Beyond day-to-day maintenance, I led two signature initiatives: migrating the earned-leave carry process from a calendar-year model to the organization’s fiscal year, and introducing JWT authentication across a backend that had previously relied primarily on frontend-only visibility restrictions. I also modernized the inherited mobile application onto a current React Native foundation.

Technical Contribution

I migrated the earned-leave carry process from a calendar-year model to the organization’s April-to-March fiscal year, covering transition behavior, outstanding applications, balance calculations, validation, reporting, and operational controls. I introduced JWT authentication across the backend and updated the web and mobile clients to use protected APIs, reducing reliance on frontend-only access restrictions.

• Fiscal-year-aware leave balance and carry calculations, with a staged carry process (start, calculation, review, confirmation, completion)
• Server-side JWT authentication rolled out across a large legacy route surface without disrupting daily use
• Replaced the mobile app’s aging React Native foundation with a modern codebase — new navigation, state, API, and test foundation
• Delivered new modules and enhancements across employee administration, attendance, benefits, payroll, and approvals

Quality & Engineering Rigor

The modernized mobile application carries meaningful automated test coverage, and focused backend tests protect authentication and newer-module behavior. The legacy web frontend carries the architectural and testing debt typical of a long-lived inherited system — an honest constraint of stewarding software built before my involvement.

Outcome

Both initiatives were introduced successfully while the platform continued supporting daily operations for a large organization-wide user base. The work established trust in my ability to handle high-risk changes to business-critical systems and became the foundation for broader ownership of internal enterprise platforms.