Sr. Python Engineer, Agentic AI

Job Summary We are looking for a Senior Software Engineer to lead the technical direction of our AI Agent initiatives. This is a backend engineering role first, focused on building scalable, reliable systems that happen to use modern AI techniques. You will architect and operate production‑grade backend services and agentic workflows that solve complex, non‑deterministic problems. While LLMs are a core capability, success in this role comes from strong systems thinking, designing for correctness, observability, failure recovery, and long‑term maintainability. You will serve as a technical anchor for the team—mentoring junior engineers, setting engineering standards, and working with leadership to turn AI concepts into dependable, customer‑facing systems. Level machine learning expertise and innovation capacity are essential. What You Will Do Architectural Leadership Design and own scalable backend architectures and complex agent‑driven workflows. This includes service boundaries, data flows, failure handling, observability, and performance characteristics—not just model interaction. Agent Behavior Engineering (Not Just Prompting) Design and productionize agent behaviors including tool invocation, state management, memory strategies, and reasoning control. Prompts are treated as code: versioned, tested, reviewed, and evolved alongside backend logic for reliability, cost, and latency. Systemic Quality & Code Health Set the bar for clean, readable, maintainable code across the Python backend. Establish patterns and standards that allow AI‑heavy systems to remain understandable and operable over time. Testing & Evaluation of Probabilistic Systems Design testing strategies for non‑deterministic AI components, including behavioral regression testing, automated evaluations, and guardrails that reduce blast radius in production. Technical Mentorship Lead code reviews as a teaching tool, run architectural discussions, and actively mentor Engineer 1–2 developers in backend fundamentals, system design, and operational thinking. Operational Excellence & Production Ownership Own CI/CD, deployment, and runtime health. Lead production support efforts and help build a strong on‑call culture where systems are observable, diagnosable, and resilient under real‑world load. Customer‑Facing Engineering Partner with product and design to deliver high‑traffic, customer‑facing experiences where AI responses must meet clear standards for latency, reliability, and UX—not just correctness. Cross‑Functional Technical Leadership Translate product goals into pragmatic technical roadmaps, identifying scaling risks, technical debt, and AI‑specific failure modes early. Advanced Debugging & Incident Leadership Lead investigations into complex issues spanning multiple services, data pipelines, or emergent agent behaviors in production. What We’re Looking For Senior Backend Engineering Depth Extensive experience designing, building, and operating backend systems in Python, including asynchronous frameworks (FastAPI, asyncio) and distributed service architectures. Production Experience at Scale A track record of owning customer‑facing systems in production. You understand uptime, latency budgets, incident response, and the cost of unreliable behavior. AI Systems Intuition Hands‑on experience integrating LLMs into real systems, with a clear understanding of their limitations, failure modes, and operational risks. You think in terms of workflows, control flow, and safeguards—not just prompt quality. Agent & Tooling Experience Experience building AI agents that interact with tools, APIs, and external systems, including managing agent state, bounding autonomy, and preventing pathological behaviors (loops, hallucinations, cascading failures). Support & Reliability Mindset Comfortable being responsible for systems after launch. You design software that is “easy to wake up to” when something goes wrong. Strong System Design Skills Experience with microservices, data stores, queues, and high‑throughput APIs—and the judgment to keep designs as simple as possible. Mentorship & Engineering Culture A desire to raise the bar for those around you through feedback, example, and thoughtful technical leadership. Pragmatism You enjoy leveraging advanced AI capabilities, but you prioritize stability, debuggability, and long‑term maintainability over novelty. Skills Adaptability Critical Thinking Curious Mindset Customer‑Oriented Python (Programming Language) Salary Primary Location Pay Range: $168,328.72 - $252,493.08 Comcast intends to offer the selected candidate base pay within this range, dependent on job‑related, non‑discriminatory factors such as experience. The application window is 30 days from the date job is posted, unless the number of applicants requires it to close sooner or later. Education Bachelor's Degree While possessing the stated degree is preferred, Comcast also may consider applicants who hold some combination of coursework and experience, or who have extensive related professional experience. Relevant Work Experience 7-10 Years Equal Opportunity Employer Comcast is an equal opportunity workplace. We will consider all qualified applicants for employment without regard to race, color, religion, age, sex, sexual orientation, gender identity, national origin, disability, veteran status, genetic information, or any other basis protected by applicable law. #J-18808-Ljbffr Comcast