API Data Transformation Function | Dataford Interview Questions

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The Justworks People frontend receives employee records in an API-specific shape. Transform the response into department groups that are ready to render, while filtering inactive benefits, removing duplicate plans, and applying deterministic sorting.

Formal Specification

Implement transform_justworks_people(response). The input is a dictionary containing a data array. Each employee has id, first_name, last_name, employment_status, an optional department object with id and name, and a benefits array. Each benefit has plan_id, plan_name, and status.

Return a list of dictionaries with this shape:

department_id: the department ID, or null when the employee has no department
department: the department name, or "Unassigned" when there is no department
employees: transformed employee objects containing id, name, status, and active_plans

Include only benefits whose status is "active". Deduplicate benefits by plan_id, retain the first name encountered for each plan, and sort plan names alphabetically. Group employees by department, sort employees by last name, first name, then ID, and sort department groups by department name.

Constraints

1 <= len(response["data"]) <= 10^5
Employee and department IDs are unique identifiers represented by strings or integers
Each employee has 0 <= len(benefits) <= 20 benefits
Each benefit has a non-empty plan_id and plan_name
Employee and department ordering must be deterministic

Function Signature

def transform_justworks_people(response):