Hi, I'm Manu

13+ years shaping data-driven products and leading high-impact engineering, data, and ML teams at Aircall, Klaviyo, Shopify, and BBVA.

Born in Marbella. Raised in Madrid. Rewired in the US.

Focused on AI and real-time systems, especially voice and on-device intelligence.

Machine Learning Generative AI NLP Voice AI Real-time Systems On-device AI Product Engineering UX Distributed Systems iOS Finance

🥦 means "stay green and eat your veggies": take care of your body and your codebase, do the unsexy refactor, tell the hard truth, and keep both yourself and the team actually healthy, not just hyped.

Latest posts
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Work Experience
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Jan 2026 - Present · Madrid & Paris
Aircall
Engineering Manager, AI

Building real-time transcription and real-time insights for Aircall’s voice platform.

Feb 2023 - Aug 2025 · Boston
Klaviyo
Engineering Manager → Senior Engineering Manager, AI & New Products

Senior Engineering Manager, AI & New Products. Built and launched AI-native products from scratch, including Customer Hub and Customer Agent for marketing and support. Led 14+ ICs across three cross-functional squads and two teams. Delivered agentic systems combining semantic and lexical search, intent routing, responsible large-scale crawling, and automated omnichannel responses, making AI a core revenue-driving capability.

Engineering Manager, Natural Language Interfaces. Founded and scaled a GenAI org from 0 to 10+ engineers across two teams. Hired and developed team leads, coached senior engineers to Staff, and seeded what became Klaviyo’s Marketing and Customer Agents through production-grade content generation and support automation.

Engineering Manager, Merchandising. Led a full-stack, ML-heavy team owning recommender systems that generated billions of recommendations during BFCM and sat on the critical path of the email rendering pipeline. Built large-scale attribution systems on Kafka, Hudi, and Spark.

Apr 2021 - Dec 2022 · San Francisco
Shopify
Machine Learning Engineering Manager

Led 12 ML Engineers across Payments and Risk. Shipped Shopify Protect, free fraud protection on Shop Pay for millions of merchants.

Recent projects
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If you want to get in touch about something or just say hi, reach out on social media.