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Fever Logo Fever · IT - Software Development

Technical Product Manager (Ai / Builder Role)

Spain, Madrid Employment contract · Job Posted May 05, 2026
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Job Description

We are looking for an AI Product Builder in Madrid: someone for whom thinking, designing, and building are not separate stages, but a single act. Someone who collapses the distance between idea and product until it becomes almost invisible. End-to-end, no intermediaries, no safe havens. You will work directly with the Data leadership and ship real impact from day one.

Job Responsibility

  • Own consumer-facing AI products end-to-end: from identifying the opportunity, to designing the experience, to shipping the implementation, to measuring impact
  • Embed AI across the full consumer flow — discovery, recommendations, conversion, retention, support — using LLMs, agents, and modern AI tooling
  • Understand our business, our customers, our market, and the data behind our consumer product
  • Move fast with strong opinions: form a hypothesis, build the smallest thing that proves or kills it, ship, learn, iterate
  • Build prototypes and production-ready experiences yourself when needed
  • Define the right metrics, run experiments (A/B tests, offline evals, online evals for AI features), and continuously improve product and model performance
  • Collaborate with stakeholders across Design, Growth, and the Tech team
  • Translate broad, ambiguous opportunities into concrete, measurable bets, and make sharp prioritization calls
  • Help shape the vision and strategy for AI in the consumer product, and bring it to life through what you ship

Requirements

  • Bachelor's degree in Engineering, Computer Science, or a related field
  • 3+ years of relevant experience building consumer-facing digital products end-to-end (as a builder, founder, full-stack PM, product engineer, or similar hybrid role)
  • Proven, hands-on experience integrating AI / LLMs into real products in production — not just prototypes or demos
  • Solid experience in consumer products: you understand user behavior, funnels, conversion, retention, and what makes a consumer experience feel magical
  • Strong technical fluency: comfortable understanding system architecture, prototyping with modern AI tools, working with APIs, and holding deep technical conversations with the engineering team
  • Independent judgment and taste: you have your own criteria for what good looks like and defend it with arguments, not consensus
  • Precision and speed: you ship quickly without losing rigor, and you treat being wrong fast as a way to get closer to the truth
  • Strong quantitative and analytical skills — comfortable with data, metrics, and turning numbers into product decisions
  • Proficiency in English
  • able to communicate complex technical and product ideas clearly to any audience, in writing and in person
  • High sense of ownership, urgency, and drive in a fast-paced, ambiguous environment

Nice to have

  • Hands-on experience with the modern AI stack: LLM APIs (OpenAI, Anthropic, etc.), prompt engineering, RAG, evals, agentic workflows, and AI coding tools
  • Experience designing and running evaluations for AI-powered features (offline and online), and reasoning about model quality, cost, and latency trade-offs
  • Background in tech startups, or a strong willingness to operate inside a fast-moving, high-ambition tech company
  • Track record of shipping products as a small team or solo: founder, early-stage employee, indie builder, or similar
  • Strong product taste and design sensitivity — you care about how things feel, not just whether they work
  • Experience formulating hypotheses, building lean validations, running A/B tests, and defining primary and guardrail metrics
  • Strategic sense: ability to collaborate in defining where the consumer product and its AI surface area should go in the next 1–3 years
  • Ability to build trust quickly across different levels of an organization and rally people around what you are building

What we offer

  • Flexible schedule
  • 2 days per week at the office
  • 40% discount on all Fever events and experiences
  • Health insurance from Day 1
  • English or Spanish Lessons
  • Wellhub Membership
  • Cobee (tax free allowance on restaurants and transport)
  • Possibility to receive in advance part of your salary by Payflow
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