AI Engineer - Full Stack

About the Role 📍Hybrid from Madrid or Valencia You will engineer the core of our proprietary internal platform that democratizes AI across the company. This is not a standard full-stack role maintaining existing systems, you will build the factory that enables other teams to create autonomous AI Agents. You will design Chain of Thought reasoning flows, integration layers, and agent logic that allow AI to execute complex business tasks at scale. This is applied AI engineering: no model fine-tuning, just sophisticated system design and relentless execution. You will join a new focused team of two engineers, collaborating daily with the AIGO team and cross-functional partners across Global Operations, Customer Satisfaction, and Engineering. Key Responsibilities - Develop and expand our internal AI platform, enabling internal teams to build autonomous AI Agents without deep ML expertise - Engineer Chain of Thought reasoning flows and integration layers that power agent logic - Build reliable, long-running AI Agent systems that handle failures at scale and prevent cascading outages when external LLM providers go down - Design node-based tools for intent retrieval, context management, and API routing - Program agent logic using TypeScript, Node.js, Express, React, Next.js, and SQL - Maintain a high bar for software quality and reliability while innovating at speed - Integrate AI-native tooling (Cursor, Claude Code) into your development workflow without sacrificing code quality Groupon is a marketplace where customers discover new experiences and services everyday and local businesses thrive. To date we have worked with over a million merchant partners worldwide, connecting over 16 million customers with deals across various categories. In a world often dominated by e-commerce giants, we stand out as one of the few platforms uniquely committed to helping local businesses succeed on a performance basis. Groupon is on a radical journey to transform our business with relentless pursuit of results. Even with thousands of employees spread across multiple continents, we still maintain a culture that inspires innovation, rewards risk-taking and celebrates success. The impact here can be immediate due to our scale and the speed of our transformation. We're a "best of both worlds" kind of company. We're big enough to have the resources and scale, but small enough that a single person has a surprising amount of autonomy and can make a meaningful impact. Groupon’s purpose is to build strong communities through thriving small businesses. To learn more about the world’s largest local e-commerce marketplace, click here. You can also find out more about us in the latest Groupon news as well as learning about our DEI approach.