The Senior Application Engineer – Banking Systems is responsible for the operational stability, maintenance, and support of critical banking software applications, including the FIS core banking platform, Q2 digital banking system, and the MANTL account origination platform. In this senior role, you will manage and maintain core banking and supporting software solutions by collaborating with internal IT teams, business units, and vendors to install, update/patch, secure, monitor, troubleshoot, and optimize these application environments. A key focus is ensuring high availability of customer-facing digital banking services (online and mobile banking) through proactive monitoring, timely incident resolution, and continuity planning. This position also leads efforts in integrating new features or third-party solutions into the banking systems and guarantees that upgrades or changes meet technical requirements without disrupting existing services. Strong technical acumen, problem-solving abilities, and effective communication skills are essential for success in this role. This is a full-time, permanent position based on-site in Plano, TX, working closely with both business stakeholders and technology vendors to support the bank’s core and digital platforms.