Hi, I'm Alessandro 👋

I lead the software organization at Quilt, a climate-tech company building intelligent heat pumps to decarbonize homes. The team spans embedded, cloud, mobile, and web, and I stay hands-on, from designing the strategy to writing the code.

Before Quilt I spent over a decade at Google in Travel: founded the Sustainability engineering org and shipped emission labels in Google Flights to hundreds of millions of users.

Writing on abahgat.com

The Velocity Paradox — why 100x faster code generation doesn't mean 10x faster shipping.
Permission Structure — using AI for evaluation, not just execution.
The Ghost in the Training Set — managing Contextual Debt in agentic systems.
Stuck in the Maze — what Zork reveals about agents and connected systems.
Visualizing Ukkonen's Algorithm — interactive companion to a classic algorithm.

Selected projects

suffixtree — Ukkonen's algorithm in Java, modernized to Java 21 and published to Maven Central.
timcp — MCP server wrapping Google's Travel Impact Model.
google/travel-impact-model — TIM, built by the team I led at Google; now used by Skyscanner and Expedia.

abahgat.com · LinkedIn · I also coach senior engineering leaders.

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A sample implementation of user account management with webapp2.

Python 177 50
A small Java bittorrent library, powering BitLet.org

Java 160 492
A Java implementation of a Generalized Suffix Tree using Ukkonen's algorithm

Java 127 61
A tiny UPnP (Universal Plug and Play) client library written in Java

Java 101 36
An MCP server implementation of the Travel Impact Model (TIM) for calculating life-cycle greenhouse gas emissions from flights.

Python 2
A Redmine plugin to search for possible duplicates when users are about to open new issues.

Ruby 69 43