Our partner is looking for a Business System Analyst (Tax & Customers) based in Spain. Join a growing fintech product team building an advanced tax engine designed to simplify integral tax compliance for internet businesses. As a Business System Analyst, you will play a key role in translating business needs into clear technical requirements and scalable product solutions.

Your responsibilities will include analyzing APIs, mapping data flows, defining product logic, and ensuring development teams have clear specifications. You will help shape solutions covering tax registration, calculation, nexus monitoring, filing, and remittance across the US, Canada, and Europe. As the first dedicated analyst within the Tax & Customers domain, you will take ownership of requirements, system analysis, and documentation to help accelerate product development.

Translate product ideas and business needs into clear user stories, acceptance criteria, and development-ready specifications. Map data flows and support the design of scalable product architectures and integrations. Collaborate with Product Managers and engineers to shape merchant-facing features, including tax registration, nexus monitoring, calculations, and filing workflows.

Investigate complex business scenarios, clarify product logic, identify edge cases, and eliminate ambiguity before development begins. Maintain accurate and structured documentation covering product requirements, system behavior, and business logic. The ideal candidate combines strong analytical capabilities with technical knowledge and the ability to collaborate effectively across business and engineering teams. 1–2+ years of experience as a Business Analyst, Product Analyst, or System Analyst within a product-oriented company.





Understanding of REST APIs, JSON, system interactions, and data flow analysis. Strong requirements‐gathering and documentation skills, including user stories, acceptance criteria, and edge‐case analysis. Familiarity with Jira, Confluence, diagramming tools, and basic SQL.

Understanding of the Software Development Life Cycle (SDLC) and Agile methodologies. Ability to work independently, navigate ambiguity, clarify complex requirements, and bridge technical and business needs. Upper‐Intermediate English proficiency or higher.

Background in fintech, payments, billing, SaaS, or other complex product environments. Familiarity with tax compliance concepts such as VAT, sales tax, nexus monitoring, and tax filing. Work closely with an experienced Group Product Manager who will support your professional development.

Work on a recently rebuilt system with minimal technical debt, combining in-house tax capabilities with third‐party integrations. Develop valuable knowledge of international tax compliance, fintech infrastructure, billing systems, and complex API integrations. Collaborate with an experienced engineering team that emphasizes technical design discussions, code reviews, testing practices, metrics, alerts, and automated CI/CD.

General professional network: Become part of an international entrepreneurial ecosystem through a global community of high‐impact businesses.

Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre‐contractual measures under applicable data protection laws (including GDPR).

📌 Business System Analyst (Tax & Customers) (Madrid)
🏢 Jobgether
📍 Madrid