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The Head of Group Accounting and Reporting is responsible for the integrity, accuracy, and timeliness of Optiver’s consolidated financial reporting. The role sits within Group Finance, reporting to the Global Lead of Finance, and operates in a high-performance environment requiring strong technical judgement, clear ownership, extensive experience in the financial services industry, and the ability to translate complex accounting matters into practical outcomes. What you'll do  Be accountable for Group-wide financial reporting compliance, ensuring the integrity of consolidated financial statements and alignment with IFRS requirements. Own the Group technical accounting framework, setting policy and ensuring consistent application across jurisdictions. Partner with Finance, Risk, Legal, and business leadership to assess new standards and complex transactions, and provide clear technical accounting guidance. Lead the preparation of consolidated financial statements, including the annual report and interim reporting, ensuring compliance with IFRS and internal policies. Be accountable for the Group month-end and quarter-end close processes, maintaining a high-quality, controlled reporting environment and driving consistency across regions. Own the external audit relationship, acting as the primary point of contact, leading the Group audit process, aligning on technical positions, and resolving issues pragmatically. Represent Finance at Audit Committee meetings, clearly articulating key accounting matters and judgements. Co-lead Finance Transformation initiatives at Group level, driving the modernization of finance processes, controls, and automation, including AI.  Oversee regulatory reporting for Optiver Holding B.V., ensuring compliance and alignment with Group reporting requirements. Lead and develop the Group Accounting and Reporting team, fostering ownership, accountability, and continuous improvement. Who you are 15+ years of progressive experience in technical accounting, financial reporting, accounting advisory, or controllership within financial services or other complex international environments. Someone with deep expertise in IFRS and strong technical accounting capability across financial instruments and fair value measurement.   Strong analytical skills and judgement, with the ability to operate effectively in a fast-paced environment and balance technical rigor with pragmatic decision-making. Proven experience leading teams and managing senior stakeholders, including external auditors. Professional accounting qualification required. Robust experience in the Financial Services industry or exposure to complex financial instruments is preferred Big 4 experience is a plus Team spirit and strong ability to work in a globally set up organization with dispersed teams residing around the world Who we are At Optiver, our mission is to constantly improve the market by injecting liquidity, providing accurate pricing, increasing transparency and acting as a stabilizing force no matter the market conditions. With a focus on continuous improvement, we participate in the safeguarding of healthy and efficient markets for everyone who participates. As one of the largest market making institutions, we are a trusted partner of 70+ exchanges across the globe. What you'll get You’ll join a culture of collaboration and excellence, where you’ll be surrounded by curious thinkers and creative problem solvers. Motivated by a passion for continuous improvement, you’ll thrive in a supportive, high-performing environment alongside talented colleagues, working collectively to tackle the toughest problems in the financial markets. In addition, you’ll receive: A performance-based bonus structure unmatched anywhere in the industry. We combine our profits across desks, teams and offices into a global profit pool. The opportunity to work