AI Product Engineer
Fully Remote
We are seeking a founding AI Product Engineer to help our client shape their product from the ground up. You'll wear every hat – product, design and engineering – and have an outsized impact on what we build and how we build it. This is a role for someone who thrives on ambiguity, ships fast, and wants to define what an AI-native product looks like. This position is 100% remote.
Responsibilities include:
• Own AI powered features end to end – from identifying user problems to shipping polished, production ready experiences.
• Talk to users, define product requirements, and decide what's worth building next.
• Design intuitive UX flows and interfaces for AI native interactions.
• Build across the full stack – backend services, AI/LLM integrations, and frontend UI.
• Develop and refine prompts, retrieval pipelines, and agentic workflows using frontier LLMs (Claude, Gemini, GPT).
• Build evaluation frameworks to measure model quality, accuracy, caching, fallback strategies, and cost optimization.
• Help shape engineering culture, technical standards, and product direction as the team grows.
• Stay current with advances in LLMs, RAG, agents, and evaluation techniques; bring promising ideas into the product.
• Move fast, ship often, and iterate relentlessly based on user feedback.
Minimum Requirements:
• 4+ years of professional software engineering experience.
• Strong proficiency in Python and a modern web framework (FastAPI, Flask, Django, or similar).
• Frontend experience with React, TypeScript, or a comparable framework.
• Hands on experience building applications with LLM APIs (OpenAI, Anthropic, Google, or open-source models).
• Solid understanding of prompt engineering, retrieval-augmented generation (RAG), and evaluation methods.
• Strong product instincts – able to identify what's worth building and make sound UX decisions.
• High autonomy – thrives without a detailed spec or established process.
• Bias toward shipping; comfortable trading polish for speed when it matters.
Additional Requirements (Optional):
• Prior founding engineer, solo builder, or early-stage startup experience.
• Design fluency (Figma, prototyping, visual design fundamentals).
• Experience with agent frameworks, tool use, or multi-step LLM workflows.
• Familiarity with cloud platforms (GCP, AWS, or Azure) and containerized deployments.
• Background in regulated or compliance-heavy domains (FedRAMP, HIPAA, SOC 2, etc.).
Marathon TS is committed to the development of a creative, diverse and inclusive work environment. In order to provide equal employment and advancement opportunities to all individuals, employment decisions at Marathon TS will be based on merit, qualifications, and abilities. Marathon TS does not discriminate against any person because of race, color, creed, religion, sex, national origin, disability, age or any other characteristic protected by law (referred to as "protected status ").
