Juan Figuera

Payments taught me scale. AI is teaching me scope.

NowDirector, Product — Amex Digital Labs
BeforeCo-founder, HarvestYield · sold 2025
BuildingAPOA — authorization for AI agents
I

About

Electrical engineer by training, product leader by trade, repeat founder by habit.

The question I keep coming back to lately: how an agent gets authority to act on someone's behalf, and how that authority stays scoped, logged, and revocable. Most agent demos end with an API key and hope. That's the gap APOA is trying to close, as an open-source layer on top of MCP.

II

Notes

Apr 2026

Claude Design is 🔥🔥🔥

Always liked UI/UX design, and love working in Figma. Tried Claude Design recently and was so impressed with the quality of the output: multiple design directions, high-definition mockups. Makes me wonder how design will evolve over the next 12 months.

Apr 2026

What APOA adds to MCP

The piece I keep adding to MCP is capability attenuation: every time an agent delegates to another agent, the new permissions can only be narrower than the parent's. Never wider. The protocol enforces it at signing, and cascade revocation means pulling one token breaks the chain below it. Around that: OAuth for APIs, browser-based credential injection for the long tail that doesn't have one, natural-language soft rules logged next to hard rules the protocol refuses outright, per-action audit. None of it is novel alone. The question is whether it's the right default for agents acting on behalf of people.

III

Projects

Open source

APOA

Agentic Power of Attorney

Open-source authorization for AI agents, modeled on power of attorney. Works for services with APIs (OAuth under the hood) and services without (browser-based credential injection where the AI never sees the credentials). TypeScript and Python SDKs shipped, plus MCP and A2A packages.

Open SourceAI Agentsagenticpoa.com
2026 →
PSA

Ship Responsibly

A PSA for the vibecoding era

A satirical public health campaign about the risks of shipping vibecoded software. Five levels of responsibility, from renaming vacation photos to medical software built over a long weekend. Includes a playbook with real guidelines for shipping safer code.

SatirePlaybookshipresponsibly.com
2026 →
Weekend build

Silicon Fighter

Street Fighter, but for CEOs

A fun take on the iconic Street Fighter game I grew up with, starring tech CEOs instead of Ryu and Ken. Built over Thanksgiving weekend with Claude Code, Cursor, and Nano Banana Pro.

Pixel artGamingsiliconfighter.com
2025
IV

Experience

2019 → Now

American Express Digital Labs

Director, Product Management

Leading AI personalization and membership products inside the Amex mobile app. Built and mentored a team of product managers across membership and AI initiatives.

  • Dining & Hotel Recommendations
    AI-powered personalization built from spend patterns, location signals, and explicit preferences. Dining inventory from Resy, hotels from Amex Travel. Available in the Amex Mobile App.
    2024 →
  • Carbon Emissions Tracker
    Data-driven sustainability feature tied to actual transaction data rather than estimates. 7,300+ tons of CO₂ abated over the program's first two years.
    2022–2023
  • Amex Token Service
    Scaled payment tokenization infrastructure from $100M to $1.1B in annual transaction volume through feature development, API optimization, and merchant adoption.
    2019–2021
2015–2025

HarvestYieldAcquired

Co-founder & CTO

B2B agricultural fleet management platform. Built and scaled from zero to acquisition over ten years. Most of what I know about running a real business came from here.

  • Scale
    Grew to 1,700+ monthly users and $15M+ in transactions before the acquisition.
    2015–2025
  • Technical leadership
    Recruited and managed the engineering team. Owned full product lifecycle on Ruby on Rails, Swift, PostgreSQL, and AWS.
    2015–2025
2013–2015

Daily Burn

Software Engineer

Built the fitness recommendation engine that increased user engagement by 25%. Optimized backend API performance by 20%.

2011–2013

Deutsche Bank

Associate Business Analyst

Architected incident management platform for 24/7 monitoring of high-frequency trading systems. Wrote business requirements and UX flows for financial products.

V

Say hi

Always looking to meet interesting people!