Senior Tax Compliance Specialist

Source Up was founded in 2021 and is a company based in Luxembourg. We carry out our assignments in various sectors, ranging from banking, private equity, insurance, industry…with a pragmatic, proactive and solution-driven approach.  We strongly believe in the ideal of "having the right people in the right job".  We combine people and technology to connect individuals to their future professional project  We work with passion for candidates and employers with the ambition to bring the greatest number of people to bloom in their professional environment  Why apply ? You will be working in an international company present in 30 countries. You will discover different regulations and work in a fast paced environment. Recognized as the most professional firm in its sector, you will develop your technical knowledge, innovative solutions and become an expert in your field. Our client fosters a culture of connecting and sharing knowledge and best practices. About the offer Permanent contract Location : Madrid Top 3 Key competencies : Previous experience in a Tax Compliance Team Supervisor Fluency in Spanish & English About our client Sector : Service provider in fund, corporate, capital market and private wealth Values : Collaboration| Innovation | Excellence | Solution driven Employees : Worldwide +8000 / Spain: 200 Your missions You will be part of a local and collaborative Tax team. You will work under the supervision of the Business Unit Manager, and you will be responsible for the tax relating to client companies in the allocated portfolio with a focus on a particular client sector and for supervising junior roles. Key Responsibilities: Tax Compliance • Review, inspect, and analyse various tax declarations• Review both internally and externally prepared tax returns• Ensure timely filing of tax returns prepared internally or by external providers• Oversee and monitor portfolio tax obligations and carry out all necessary controls• Prepare or review clients’ tax compliance status reports• Provide technical support to the Accounting and Legal teams on tax-related queries• Review invoicing information to ensure accuracy and compliance• Participate in meetings or calls with clients and tax advisors Team Supervision • Manage and allocate the team’s workload, ensuring both quality and productivity• Oversee and monitor tax compliance obligations across the portfolio• Train and onboard new team members• Provide feedback on team performance to the Business Unit Manager of the Tax Department This position is a great opportunity to : Work directly with international clients from diverse industries, developing both your technical expertise and your client relationship skills. Develop within a global corporate services environment, where continuous learning and cross-functional collaboration are encouraged. Your ideal profile 5–7 years of experience in a similar Tax Compliance role. Bachelor’s or Master’s degree in Tax Law. Fluent/Native Spanish and advanced English (C1)  Strong understanding of tax calculations (VAT, CIT, Withholding Taxes). Solid knowledge of financial accounting principles and how they apply to tax matters. Familiarity with STA procedures and tax authority regulations. Ability to interpret internal and external tax policies and regulations. Experience preparing, reviewing, and filing tax declarations and managing a portfolio’s tax obligations. Knowledge of IFRS or US GAAP (depending on region). Ability to support audits, review financial statements, and manage tax notifications. Experience supervising or mentoring junior team members. Ability to manage team workload, ensure quality, and support onboarding/training. A candidate experience with Source Up, it’s … Carry out a skills assessment (soft skills and technical skills) in order to better define your professional project Access to your test results to guide you to your best career choices Interview coaching session before the client meeting Consistent and fair recruitment process with respect, transparency and trust