CFO
Alex Rak

Company's CFO, responsible for financial strategy, reporting, budgeting, and liquidity management. With over 20 years of financial experience spanning audit, corporate finance, and venture capital across Poland, Spain, and China, he brings an international perspective to building scalable financial infrastructure in a high-growth tech environment. Privately seasoned international traveler and board games fan, who feels equally at home in Wrocław and on the other side of the world. Most recently in love with his dog, who now manages his free time and vacations.
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Work with engineers who contribute to the ecosystem and turn new technology into real products. At Callstack, AI is part of how we build, learn, and ship software.