Citi is hiring a Senior Full-Stack Engineer to join its ATM Technology team, focusing on the design and development of enterprise-grade ATM applications. This role involves hands-on technical work alongside leadership responsibilities for lab environments and fleet expansion initiatives. The engineer will use Angular for front-end development and Java for back-end services while managing network security and connectivity. Key tasks include collaborating with cross-functional teams to align with architectural standards, overseeing global lab functions, and integrating new hardware vendors. Ideal candidates have over six years of experience in ATM application development or similar enterprise financial technology platforms, along with expertise in Java programming, network firewall management, and lab environment governance. Strong leadership skills and the ability to mentor engineers are essential for driving technical initiatives within a high-availability system context.