Job Summary: Responsible for domestic and international billing, issuance of tax documents, accounts receivable control, and collaboration with internal teams to ensure accuracy and customer satisfaction. Key Highlights: 1. Domestic and international billing 2. Collaboration with accounting and finance teams 3. Customer service and issue resolution Domestic and international billing; Issuance and delivery of invoices, tax invoices, and expense notes to domestic and international clients; Detailed review of pro\-invoices, ensuring invoices are sent according to partners’ instructions and contractual specifications; Monthly monitoring and regular collection of outstanding invoices to reduce the percentage of delinquent customers; Close collaboration with accounting, accounts payable, and accounts receivable teams to resolve billing and collection issues; Client, case, and billing rule registration in the internal system; Responsible for collecting and ensuring billable hours entries are made throughout the month to avoid delays in client billing; Collaborate with other departments to ensure billing accuracy; Respond to inquiries and handle customer complaints; Address general requests from internal and external customers, ensuring prompt and high\-quality responses. Internship working hours: 4 hours per day. Position type: Internship Contract duration: 12 months Compensation: R$1\.200,00 per month Benefits: * Transportation allowance Selection question(s): * Intermediate English (minimum). Work location: On\-site