Grant
Timmerman

Full-Stack Software Engineer

About

Grant Timmerman

Hello there! I'm Grant Timmerman. I built Cloud Functions and App Engine serverless runtimes—Functions Framework, java17, ruby30—and created clasp, the Apps Script CLI (25k+ req/day). Now I'm at Cartesia building real-time voice AI.

Experience

Where I've worked

Cartesia - Member of Technical Staff
Mar 2026 – Present
Building real-time voice AI.
TypeScript
React
Anon.com - Staff Full-Stack Engineer; Interim Manager
Mar 2024 – Nov 2025
Led the dashboard, API, and docs for AI web-automation workflows.
  • Built API, UI, and docs for the AI developer platform with 3 engineers.
TypeScript
React
Postgres
GCP
Additive.AI - Member of Technical Staff
2023-2024
Built the web console, tax-PDF pipeline, and Excel workpaper tools.
  • Designed and built the frontend web experience for app.additive.ai
  • Built PDF generation pipeline for tax documents
  • Enhanced Excel workpaper with features such as checkfigures, error messages, and a summary page
TypeScript
React
Python
PyMuPDF
Django
Postgres
Docker
GCP
Observable - Senior Software Engineer
2022-2023
Shipped social follows/timeline, private viz embeds, and editor upgrades on the data visualization platform.
  • Built social identity (the ability to follow accounts and see a timeline of user activity)
  • Improved the core editing experience via a new menu and set of recommendations
  • Enabled Private embeds: The ability to securely share a single visualization on other sites
  • Worked on dashboards. Dozens of enhancements and bug fixes.
Node
TypeScript
JavaScript
Postgres
Heroku
Google - Software Engineer, Google Cloud, Serverless
2021-2022
Built Cloud Functions and App Engine runtimes, including java17, ruby30, and Functions Framework.
  • Built serverless runtimes for Google Cloud, App Engine and Cloud Functions.
  • Created java17 and ruby30 runtimes.
  • Created new features for the Functions Framework.
Java
Ruby
Go
Node
Google - Developer Programs Engineer, Google Cloud, Serverless
2019-2021
Built Functions Framework plus Eventarc and Cloud Workflows developer experience.
  • Led and built Google Cloud Functions computing strategy through the Functions Framework. Built 7 open source function runtimes in collaboration with language experts: git.io/gcfff
  • Built Eventarc devX: Google CloudEvents repos generated client libraries and samples.
  • Built Cloud Workflows devX: IDE autocompletion, API client libraries, and samples.
  • International speaker for Google Cloud. Spoke at over 30 developer events in 12 countries (USA/CAN/LatAm/Europe/SEA). Audiences between 20 and 500 developers.
Node
Python
Go
Java
Ruby
PHP
.NET
Dart
C++
Google - Developer Programs Engineer, Google Workspace (G Suite)
2017-2019
Created clasp, the Apps Script CLI (25k+ req/day), and Workspace API samples.
  • Designed, built, launched the Apps Script CLI, google/clasp. Sees 25k+ req/day. Used by thousands of devs building add-ons.
  • Created GitHub org, googleworkspace. Built API samples for Sheets, Slides, Drive, and other products.
Node
Python
Go
Java
Ruby
PHP
.NET
Apps Script
Sift Science - Software Engineer
2016-2017
Built features for the fraud APIs and web console, including workflows, enhanced payment and social profile data, and Mixpanel tracking.
Java
React
SCSS

Earlier experience

  • Google · Software Engineer InternAndroid app validation · Summer 2015
  • Sift Science · Software Engineer InternFraud tooling and visualization · Winter 2015
  • LinkedIn · Software Engineer InternGlobalized skills search · Summer 2014
  • Facebook · Open Academy - Socket.IOSocket.IO example app · Jan–June '14
  • Tableau · Software Engineer InternDashboard transparency and API · Summer 2013
  • Nor1 · Software Engineer InternHotel inventory applications · Summer 2012
  • Kongregate · Game DeveloperIndie Flash games · 2008-2011

Side Projects

Hackathon and side projects I've shipped