Upstream is a global leader in mobile marketing automation and digital service innovation, enabling mobile network operators and brands to grow revenue and engagement. Headquartered in Athens, Greece, with regional hubs in London, Dubai, Johannesburg, Lagos, São Paulo and Rio de Janeiro, Upstream delivers end-to-end strategy, creative development, technical deployment, campaign execution and ongoing optimization for seamless, scalable, and performance-driven service delivery. Role: We are looking for a motivated professional to join our Financial Reporting team. In this role you will handle controlling activities for our regional entities, prepare monthly IFRS reporting packages, and support the Group’s consolidation process. You will collaborate with external or in-house tax and accounting consultants in our local subsidiaries and report directly to the Group Controller based in Athens. Key Accountabilities: Maintain and review accounting books, records, and entries in SAP. Review payments and payment/PO schedules. Coordinate with external tax and accounting consultants for tax filings and ensure compliance with accounting, tax and statutory requirements. Prepare the monthly IFRS reporting packages for Group reporting and consolidation. Lead the coordination of the annual audit and liaise with external auditors for statutory and Group purposes. Maintain and enforce accounting policies and procedures. Support the business with financial reports and other special projects. Candidate profile: 4–6 years of experience in an accounting department or an audit firm; ERP experience

Upstream is a global leader in mobile marketing automation and digital service innovation, enabling mobile network operators and brands to grow revenue and engagement. Headquartered in Athens, Greece, with regional hubs in London, Dubai, Johannesburg, Lagos, São Paulo and Rio de Janeiro, Upstream delivers end-to-end strategy, creative development, technical deployment, campaign execution and ongoing optimization for seamless, scalable, and performance-driven service delivery. Role: We are looking for a motivated professional to join our Financial Reporting team. In this role you will handle controlling activities for our regional entities, prepare monthly IFRS reporting packages, and support the Group’s consolidation process. You will collaborate with external or in-house tax and accounting consultants in our local subsidiaries and report directly to the Group Controller based in Athens. Key Accountabilities: Maintain and review accounting books, records, and entries in SAP. Review payments and payment/PO schedules. Coordinate with external tax and accounting consultants for tax filings and ensure compliance with accounting, tax and statutory requirements. Prepare the monthly IFRS reporting packages for Group reporting and consolidation. Lead the coordination of the annual audit and liaise with external auditors for statutory and Group purposes. Maintain and enforce accounting policies and procedures. Support the business with financial reports and other special projects. Candidate profile: 4–6 years of experience in an accounting department or an audit firm; ERP experience