A senior engineer with five years of production experience ships a resume. React, TypeScript, AWS, Kubernetes: all of it real, all of it daily. Strong GitHub. Clean system design instincts. Applying for roles they're genuinely qualified for. No callback. Not from one company. From seven. The engineering hiring process has a layer most developers never think about. Before your resume reaches an engineering manager, before any human reads a single line, it runs through an Applicant Tracking System. The ATS doesn't evaluate your architecture decisions or your GitHub commit history. It compares strings in your resume against strings in the job description. Exact strings. This is where strong candidates disappear. The failure mode is invisible because it looks like a match when it isn't. You wrote "K8s" because that's how your team refers to it. The job description says "Kubernetes." The ATS scores you as missing Kubernetes experience.…