This chapter provides a comprehensive introduction to Financial Technology (FinTech). It begins by defining FinTech and exploring its key sectors, such as digital payments, blockchain, and robo-advisors. The chapter then examines the cutting-edge technologies driving this transformation, including AI, big data, and cloud computing. A significant portion analyzes how FinTech is reshaping traditional banking through increased competition and enhanced financial inclusion. Finally, the chapter details the essential legal and regulatory considerations for FinTech startups, covering business formation, intellectual property, fundraising, and the specific requirements of major financial hubs. It concludes with a deep dive into blockchain technology, its applications beyond cryptocurrency, and the associated legal landscape.