juansg.dev
Hey, I'm

Juan.

Currently Founding Engineer at Ardent.ai. Previously built at Facebook, Stripe, and two robotics startups. 14 years making tools I wish existed.

RoboticsVRDevToolsAI

~ terminal
/NOW

What I'm up to.

Last updated: January 2026

Building @ Ardent.ai

Founding engineer helping reimagine software in the age of AI. Building tools that make people more efficient and effective at their work.

Full-Stack AI

Owning every layer so agents can be extended with user-created skills, execute securely in sandboxes, and surface results through purpose-built UI.

Agentic Architecture

Building a code-first agent architecture. Rather than tool-calling loops, agents generate and execute code in secure sandboxes. Dramatically faster and more token-efficient.

Come Work With Me

Looking for a senior/staff Product Engineer. TypeScript, React, and a love for shipping. Remote, real equity, no BS interviews.

View role →
EXPERIENCE

Where I've shipped.

14 years of building products that people actually use.

2025 — PresentArdent.aiArdent.aiFounding Engineer
  • Building tools that make people more efficient and effective. AI that gives users superpowers
  • Owning every layer so agents can be extended, execute securely, and surface results through purpose-built UI
AI/LLMElectronTypeScript
2021 — 2025
Stripe
Senior Software Engineer
  • Led Radar fraud detection platform as tech lead
  • Founding engineer on Internal Docs. Turned a top 5 company pain point into a highly-rated tool
  • Developer Experience: GitHub Enterprise consolidation (8+ hr backups → 30 min), Stacked PRs system
DevToolsInfrastructureRuby
2019 — 2021Advanced.farmAdvanced.farmSenior Software Engineer
  • Led robotics team shipping autonomous navigation and collision avoidance
  • Built harvesting simulator that reduced testing cycles from 5+ hours to 15 minutes
RoboticsPythonSimulation
2017 — 2019FacebookFacebookSoftware Engineer, VR
  • Built social VR experiences for Facebook Spaces and Oculus Rift
  • Shipped Groups integration, multiplayer video/music playback, and 360° photo portals
VRUnityGraphQL
2013 — 2017SunpowerSunpowerSoftware Engineer
  • Built tools to automate solar plant layouts, reducing design time from days to minutes
  • Developed AWS infrastructure and real-time monitoring for plant performance
AngularJSPythonAWS
2012 — 2013
GreenboticsGreenbotics
Software Engineer
  • First role out of college. Developed control firmware for robotic solar panel cleaners
  • Deployed to 100+ units. Acquired by Sunpower
RoboticsC++Arduino
Juan Sanchez
ABOUT

Beyond the code.

Dad of two amazing girls. Private and glider pilot. Former giant scale RC aerobatics competitor, now teaching it on YouTube. Sim racer (yes, that's a simulator in my office!).

Pilot
RC Planes
Racing
Dad