The Software Engineer II position at The Trade Desk involves fixing bugs in the TTD platform, analyzing performance, and improving software components. The role requires participation in costing, designing, and specifying requirements for features requested by clients. Engineers will engage in discussions with product managers and stakeholders to design systems and analyze project requirements. Responsibilities include collecting, storing, changing, and analyzing data for data-driven decisions, designing and modifying software systems, and building testing and validation tools. The engineer will also define and measure system KPIs, deploy software components, and build monitoring systems. The role requires independent planning and execution of projects within a 1-6 month scope, applying modern software engineering techniques and best practices without guidance.