You will join Kreios Space’s Finance team, working closely with the Finance Manager to keep the company’s day-to-day financial and accounting operations running smoothly. You will support payments, accounting records, reconciliations and reporting, while helping maintain accurate and well-organised financial information as the company grows. You will also support the financial management of publicly funded R&D projects, including the tracking and justification of project costs and the preparation of supporting documentation. Own day-to-day finance operations : Support invoice management, expenses, payments, bank reconciliations and accounting documentation. Support closing and reporting :Work with the Finance Manager on reconciliations, cash monitoring, month-end activities and preparation of financial information. Support public funding and R&D projects :Track eligible costs, personnel expenses, invoices and supporting documentation for project reporting and audits. Keep financial information accurate : Ensure records and supporting documents are complete, traceable and properly maintained. Work across the company : Coordinate with People, Procurement, Operations and technical teams to collect information and resolve discrepancies. Improve how Finance works : Help implement and improve financial processes, controls and tools as Kreios scales.- Degree or vocational qualification in Finance, Accounting, Business Administration, Economics or a related field. Around 2-3 years of experience in finance, accounting or financial administration. Good understanding of basic accounting principles and day-to-day financial processes. Experience with invoices, payments, bank reconciliations, expenses and accounting documentation. Strong Excel skills and confidence working with financial data. Good organisational skills, attention to detail and a proactive, resourceful mindset. Comfortable working in both Spanish and English. Able to identify issues, ask the right questions and follow tasks through to resolution in a fast-moving environment. Nice to have Previous experience in a startup, technology or engineering company. Exposure to public funding, grants or R&D project financial justification. Experience supporting month-end closing or management reporting. Experience with ERP or accounting software and familiarity with Spanish accounting and tax processes. Interest in developing a broader career in Finance within a growing international company. We are looking for someone curious, reliable and sharp: someone who understands what they are doing, spots inconsistencies and is ready to take on more responsibility as the Finance function grow. Be part of a fast-growing NewSpace company where your work will directly support the financial operations behind cutting-edge aerospace innovation. You will gain exposure to a wide range of finance activities, from accounting and reporting to the financial management of publicly funded R&D projects. Join a collaborative and ambitious team where you will work closely with different departments, contribute to the improvement of financial processes and have the opportunity to grow your responsibilities as the company continues to scal