AgileEngine is seeking a Senior Backend Engineer to architect and build core services for a next-generation ads platform. You will design high-throughput, low-latency systems for campaign delivery, targeting, attribution, and partner integrations using Python, Django, Kubernetes, and AWS. You will drive architectural decisions, own end-to-end systems, and collaborate with product and data teams while mentoring engineers in a fast-paced, remote environment with strong ownership and impact.