Google Apps Script developer for hire.

What is Google Apps Script?

Google Apps Script (GAS) is a JavaScript-based runtime built directly into Google Workspace. It runs natively on Google's servers — meaning zero hosting costs, zero deployment headaches, automatic scaling, and built-in authentication for every Google account in the world.

For small and mid-sized businesses, this is a superpower: you can build internal tools, customer-facing portals, multi-marketplace dashboards, CRMs, inventory systems, and complete SaaS-style platforms — all backed by Google Sheets as the database — without paying for AWS, hiring DevOps, or worrying about uptime.

We've shipped Apps Script systems handling six-figure monthly revenue for trading card retailers, Amazon sellers, print shops, and field-service companies. It's not a toy — it's a production-grade platform when used correctly.

What we build with Apps Script

Every project is custom-architected for your workflow. Common patterns we deliver:

• SaaS-style web applications with multi-role login (admin, manager, staff, viewer), session tokens, and PIN-hash authentication
• Multi-marketplace dashboards integrating Shopify, Amazon SP-API, eBay, Etsy, TikTok Shop, Walmart, and Whatnot into a single Sheets-backed UI
• Custom CRMs and order management systems with kanban boards, status pipelines, and automated email/SMS triggers
• Live selling dashboards for trading cards, jewelry, fashion — capturing TikTok Live, Whatnot, and Fanatics orders in real time
• Inventory sync engines with bulk API operations, self-chaining triggers, and crash-safe progress saving
• Quote and invoice generators with PDF export, Gmail attachment delivery, and VAT/GST calculation pipelines
• Reporting platforms with scheduled triggers, dynamic chart generation, and email distribution
• AI-integrated tools using OpenAI, Julius AI, Claude — with streaming response handling and markdown table rendering

Our technical approach

After 7+ years and 400+ delivered projects, we've codified a set of architectural decisions that consistently produce maintainable, scalable Apps Script systems:

Modular file architecture

Every project follows a consistent file structure: Index.html for the main UI, CSS.html for styles, JS.html for client-side logic, and multiple service-specific .gs files for backend logic. We use HtmlService.createTemplateFromFile() with include() patterns to keep files focused and testable.

Settings-driven configuration

All configurable values — sheet names, column mappings, API endpoints, role definitions — live in a dedicated ⚙️ Settings tab using Named Ranges. This means your team can update configuration without touching code, and the system never breaks when columns are reordered.

Bulk API operations

We never write one-call-per-row code. For Shopify product updates we use the productVariantsBulkUpdate mutation with staged uploads. For Amazon SP-API we batch requests within rate limits. For Google Sheets we use getValues() and setValues() on entire ranges — not per-cell loops.

Crash-safe progress tracking

Apps Script has a 6-minute execution limit. For long-running operations we use self-chaining time-driven triggers with progress saved to PropertiesService, so a crashed run resumes exactly where it left off. No data loss, no manual restarts.

Concurrent-safe webhook handlers

For incoming webhooks (TikTok Shop orders, Stripe events, Shopify updates) we wrap writes in LockService.getScriptLock() with sensible timeouts. Idempotency keys prevent duplicate processing during burst traffic.

Comprehensive logging

Every project includes a Logs sheet that captures every API call, error, and significant event with timestamp + user + payload. When something goes wrong six months later, we can debug it in minutes — not days.

Why Apps Script over a "real" framework?

This is the most common question we get. The honest answer: it depends on your situation.

For most freelancers, agencies, e-commerce sellers, contractors, and service businesses — Apps Script is dramatically faster to ship, cheaper to operate, and easier to maintain than a custom Node.js/React stack. We'll tell you honestly if your use case is the exception.

How we work

Our process is designed around predictable delivery:

• Discovery (30 min): We map your sheets, APIs, user roles & outputs. You receive a written scope and fixed quote within 48 hours.
• Architecture sign-off: Sheets schema, Named Ranges plan, modular file layout — confirmed before any code is written.
• Module-by-module build: Daily updates. You test each module as it ships. Async-friendly across timezones, <1hr response time during India business hours.
• Handover: Setup guide, video walkthrough, Named Range documentation, and 14–60 days of free post-launch support.

Pricing

We work fixed-price, not hourly. No scope creep traps, no hourly billing surprises:

• Single-feature Apps Script project — From $375 (3–14 days)
• Multi-feature Apps Script web app — From $1,500 (2–4 weeks)
• Multi-module SaaS platform — From $3,500 (4–8 weeks)
• Ongoing maintenance retainer — $500–$2,500 per month depending on scope

All projects available through Fiverr Pro with escrow protection, or directly via WhatsApp / email for established clients.

Frequently asked questions

Will I own the code?

Yes. On project completion you own the GAS project, the Sheets, all source files, and full IP. We retain the right to use anonymized patterns in future client work.

Can you maintain the system long-term?

Yes — every project includes 14–60 days of free post-launch support. After that we offer monthly retainers for maintenance, feature additions, and priority response.

How do new clients typically engage with you?

Most new engagements start through Fiverr Pro — it gives clients escrow protection, a verified review history (400+ five-star reviews), and a structured delivery process that protects both sides. For clients who prefer direct contracting, we also accept fixed-price and retainer engagements via WhatsApp or email once scope has been discussed. Either way, the work, communication, and quality are identical.

What if I already have a Google Sheet I want automated?

That's our most common starting point. Share the sheet, describe the workflow, and we'll quote against the existing structure. We almost never rebuild from scratch unless the schema is unworkable.