Guillermo Prieto

– Built a conversational AI system handling 1M+ messages per month, with a proprietary AI harness, immediate escalation to human agents, automated failure-mode detection, and a custom evaluation framework. – Reported results included conversion rate increases of up to 30 percentage points and reductions of up to 70% in sales customer acquisition cost (CAC). – Hired and managed a four-person FDE / engineering team, adopting new AI coding tools as they became available, from coding agents to development workflows combining multiple autonomous agents across all SDLC. – Raised seven-figure funding ($) from venture capital investors and business angels and reached six-figure annual recurring revenue (ARR, $), serving midsize and large B2C companies across sectors with high customer lifetime value.

– Built a personalized AI tutor with state-of-the art LLM models tailored to teachers' curriculum and tested with 100+ students in 2 paid pilots with private schools – Built a custom conversational analytics pipeline with a state-of-the-art speech-to-text model to work in a high-noise, multiple speakers scenario with unsafe sentences detection

– Identified opportunities to improve supply and operations planning in Latin America – Worked with local teams to define and scope data initiatives addressing those opportunities

– Developed a minimum viable product (MVP) to assess vegetation risks to electrical power lines across 100 km² – Pitched more than 30 investors during a fundraising campaign

– Contributed to the design, implementation, and rollout coordination (PMO) of a custom, data-driven B2B pricing engine integrated with Salesforce, deployed in 15+ countries and covering more than €1B in annual revenue – Conducted an in-depth analysis of reverse supply chain management practices and tools (SOP) – Led user research interviews across all levels of the sales organization to identify users' pain points

– Delivered data analytics and AI projects in logistics, energy, and e-commerce – Ran customer workshops across different industries to define project ambition, breadth, and scope of work

– Secured biofuels market consulting engagements with major industry players, including Shell, Cargill, and SHV – Analyzed and modeled the impact of regulatory frameworks, including RED II, on supply and demand – Developed biofuel price forecasting models for trading desks and brokers

– Led the scientific aspects of the project, including data acquisition and labeling, infrastructure, and methodology – Applied deep learning (U-Net) on hyperspectral satellite and drone imagery for tree counting

– Worked with leading North African companies in banking, transportation, tourism, and logistics – Supported strategy projects through data science modeling, optimization, and visualization

– Optimized and automated Disney's DVD and Blu-ray purchasing system for European distribution – Delivered €100K+ in recurring annual cost savings through improved inventory and order management