Developed and integrated a new payroll feature in the PipedreamHQ/pipedream repository, focusing on expanding salary comparison and global net-salary calculation capabilities through the Obolus API. The work centered on backend development using JavaScript and Node.js, emphasizing robust validation, reliability, and comprehensive documentation. Addressed technical challenges such as handling negative values, refining request logic, and improving error management to ensure correctness across multi-country payroll workflows. Enhanced configuration by defining a central country property and streamlining payroll presets, aligning the solution with broader multi-country payroll strategies and supporting decision-making for payroll operations without introducing new bugs during the development period.