Google Workspace add-on development
Editor and Workspace add-ons with a CardService UI for Sheets, Docs, and Gmail — deployed privately or to the Google Workspace Marketplace.
Google Workspace
Google Apps Script Developer
Google Apps Script development creates automations and add-ons for Google Sheets, Docs, Gmail, Drive, Forms, and Calendar. It is intended for Google Workspace teams that need triggers, custom menus or sidebars, document workflows, external API connections, or private and Marketplace add-on deployment.
What I build
What is included in Google Apps Script development?
Google Sheets add-on developer
Custom functions, menus, sidebars, and onEdit/onOpen triggers that turn spreadsheets into dashboards, tools, and automated reporting.
Google Docs add-on developer
Document generation, templating, and find-and-replace automation built directly inside Google Docs.
Gmail & Drive automation
Auto-labeling, draft creation, and Drive file organization driven by installable triggers.
API & external integration
UrlFetchApp calls to CRMs and REST APIs, the OAuth2 library for third-party auth, and BigQuery for larger datasets.
Problems this solves
What problems can Google Apps Script development solve?
- A Google Sheet used as a database, kept up to date by manual copy-paste.
- A weekly report someone rebuilds by hand every Monday.
- A team process with no Workspace-native UI, so it lives in scattered tabs.
- An add-on you need available across a whole Google Workspace domain.
- Scripts buried in the editor with no version control or local development.
Example use cases
What does Google Apps Script development look like in practice?
Automated weekly report
A time-driven trigger builds and emails a formatted report from a Sheet every Monday — no one touches it.
Validate & sync on edit
An onEdit trigger checks new rows and pushes valid ones to an external API via UrlFetchApp in real time.
Marketplace add-on
A Workspace add-on with a CardService UI for a niche Sheets workflow, published to the Marketplace with the right OAuth scopes.
Versioned, testable code
Moved a client's editor-only scripts into clasp with Git, so changes are reviewed and deployable.
Tech stack
What technologies power Google Apps Script development?
Language & tooling
- Apps Script (V8)
- clasp
- Git
- TypeScript
Add-on UI
- CardService
- HtmlService sidebars
Triggers
- Time-driven
- onEdit
- onOpen
- Installable
Services
- SpreadsheetApp
- DocumentApp
- GmailApp
- DriveApp
- UrlFetchApp
Publishing
- Workspace Marketplace
- OAuth scopes
Process
How does Google Apps Script development work?
01
Map the workflow
I map the Sheets, Docs, or Gmail process, the data sources, and where the manual work actually hurts.
02
Build the add-on
Apps Script, CardService UI, and the right triggers — developed locally with clasp and Git, not just in the editor.
03
Test & deploy
Verified across accounts and OAuth scopes, then deployed privately or submitted to the Marketplace.
04
Support & iterate
Documentation, handoff, and ongoing tweaks as the workflow grows.
Apps Script often connects to other systems — I pair it with API integration services when it needs external data, and build document automation when the output is generated Docs.
Related services
Document Automation Software
Document automation uses templates, structured data, add-ins, and workflow integrations to generate or process documents with less manual assembly. It is intended for teams that create recurring contracts, proposals, reports, or approval packages in Word or server-side systems.
API Integration Services
API integration connects applications so they can exchange data and trigger actions without manual transfer. It is intended for teams that need a custom API, a third-party service connection, webhook processing, or a secure partner-facing interface.
Microsoft 365 Developer
Microsoft 365 development creates add-ins and integrations for supported Outlook, Word, Excel, and PowerPoint clients using Office.js, Microsoft Graph, and Entra ID. It is intended for organizations that need to place business workflows inside Microsoft 365 or connect Microsoft data to another system, with compatibility determined by each host and requirement set.
FAQ
Questions, answered
- What can you build with Google Apps Script?
- Custom automation and add-ons across Google Workspace — Sheets, Docs, Gmail, Drive, Calendar, and Forms — from a single custom function up to a full Marketplace add-on with its own UI.
- Can you publish a Google Workspace add-on to the Marketplace?
- Yes. I handle Google Workspace add-on development end to end: the CardService UI, OAuth scopes, the verification and review requirements, and either domain-wide private deployment or public Marketplace publishing.
- Do you build both Google Sheets and Google Docs add-ons?
- Yes — as a Google Sheets add-on developer and Google Docs add-on developer I build custom functions, sidebars, document generation, and data workflows in both.
- Do you use clasp and version control?
- Yes. I develop Apps Script locally with clasp and Git so code is reviewable, testable, and deployable — not trapped in the online editor.
- Can Apps Script connect to external APIs and CRMs?
- Yes. Using UrlFetchApp and the OAuth2 library, Apps Script can call any REST API — CRMs, payment tools, databases, or internal services — with secure authentication.
- Can scripts run automatically on a schedule or on edit?
- Yes, via triggers: time-driven triggers for scheduled jobs, and onEdit/onOpen or installable triggers to react to changes as they happen.
Let's build it together
Email me with what you need — I'll reply with a clear plan and next steps. Prefer chat? WhatsApp works too.