Client Tax Business Analyst

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flatexDEGIRO SE operates the leading and fastest growing online brokerage platform in Europe. Based on modern, in-house state-of-the-art technology, customers of the flatex and DEGIRO brands are offered a wide range of independent products with execution on top TIER 1 exchanges. The technological edge, high efficiency and strong economies of scale enable us to continuously improve our service offering for clients and to set leading standards in terms of product, price and platform quality.

With more than 3,5 million customer accounts and more than 75 million securities transactions processed in 2025, flatexDEGIRO is the largest retail online broker in Europe. In times of bank consolidation, growing digitalization and the immanent need of millions of Europeans to take their financial future into their own hands, flatexDEGIRO is ideally positioned for further profitable growth.

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Support the Client Tax department in tax-related projects, data analysis, and reconciliation activities.

Gather, analyze, and document business requirements for Client Tax initiatives.

Translate business requirements into functional specifications for IT development teams.

Act as the link between business, tax, operations, and IT stakeholders throughout project delivery.

Support testing, implementation, and validation of system and process changes.

Analyze data flows, identify gaps, and propose process improvement opportunities.

Maintain project, process, and requirements documentation.

Perform reconciliations between internal data and information received from custodians and external providers.

Investigate and resolve data discrepancies and reconciliation breaks.

Support QI reporting and other tax reporting obligations through data validation and reconciliation activities.

Prepare reconciliation reports and monitor data accuracy, completeness, and regulatory compliance.

Contribute to process optimization and automation initiatives.

Bachelor's or Master's degree in Finance, Economics, Business Administration, Information Management, or a related field.

Professional experience in business analysis, data reconciliation, reporting, or operational processes within the financial services industry.

Understanding of securities processing, custody services, and financial data flows.

Experience collaborating with business stakeholders and IT development teams.

Strong analytical and problem-solving skills with a high attention to detail.

Advanced Excel skills; SQL knowledge is considered an advantage.

Knowledge of tax reporting and/or Qualified Intermediary (QI) reporting is a plus.

Excellent communication and stakeholder management skills in English; additional languages are beneficial.

Ability to work independently, prioritize tasks effectively, and meet deadlines in a dynamic environment.

Proactive, solution-oriented mindset with a strong sense of ownership and accountability.

Reliable team player who performs well under pressure and contributes to a collaborative work environment.

• Promise of a good work-life balance
• 30 days paid leave
• An enthusiastic and fun team to work with
• Personal and professional development with access to relevant courses
• Transport allowance or related benefits like a leased electric bike
• Pension plan
• A challenging job in an international and fast-growing company
• A lot of freedom executing your role and a chance to shape your own career
• The opportunity to participate in a new, enthusiastic…