Custom Development

Custom Tracking & Development

When standard tags can't track what your business actually does. Custom tracking, automation, and integrations built for your exact setup — single-page apps, complex data layers, the edge cases standard tools miss.

Standard analytics tools solve common problems. But if you're doing something unique, you need custom solutions: tracking that standard tags can't handle, automation to save hours of manual work, or integrations between systems.

With a background in Computer Engineering and iOS development, I build custom solutions that bridge the gap between your analytics tools and unique business requirements. JavaScript for client-side tracking, Python for automation, Swift for mobile SDKs: whatever the problem needs.

What you get

  • Custom GTM templates
  • Automation scripts and tools
  • Data pipeline development
  • API integrations
  • Documentation and support
01

Development Services

Custom GTM Templates

Custom Tag Manager templates for tracking the native tools can't: tags, variables, and triggers that extend GTM's capabilities.

Tracking Scripts

Custom JavaScript for complex tracking scenarios: single-page apps, form tracking, scroll depth, video engagement, or platform-specific interactions.

Data Automation

Python scripts to automate reporting, data processing, quality checks, or migrations. Save hours of manual work with scheduled automation.

API Integrations

Connect your analytics tools to CRMs, marketing platforms, or internal systems. Automated data flows that eliminate manual exports and imports.

Data Pipelines

Custom ETL pipelines to move data from sources to warehouses, with transformations and validations that ensure data quality and consistency.

Mobile SDKs

Custom analytics SDKs or wrappers for iOS and Android: reliable measurement in native apps with purpose-built tracking libraries.

02

Development Process

Requirements Discovery

Detailed discussion of what you're trying to achieve, current limitations, and technical constraints. I identify whether a custom solution is truly needed.

Solution Design

Technical specification outlining the approach, architecture, dependencies, and timeline. You'll know exactly what's being built before development starts.

Development

Clean, documented code your team can read and maintain. Regular check-ins to keep the build on track.

Testing & QA

Tested across browsers, devices, and the edge cases that break tracking in production. Validated against your requirements before deployment.

Deployment & Handover

Code deployment with documentation your team can maintain. You'll understand how it works, how to maintain it, and how to troubleshoot issues.

Support

Ongoing support to address bugs, answer questions, or make minor adjustments as your needs evolve.

Not sure if this is what you need? Send me your setup. I'll run a free health check and tell you exactly where to start.
Free Analytics Health Check

Common questions

What counts as custom tracking development?
Anything standard tags cannot handle: single-page apps, complex data layers, bespoke GTM templates, and custom JavaScript for events the built-in tools miss. If you have been told "GA4 can't track that", this is usually the fix.
Can you track something GA4 or GTM doesn't support out of the box?
Usually, yes. Most "the tool can't do this" problems are really a data-layer or custom-template job. I scope it first so you know whether it is a quick template or a larger build before any work starts.
My site is a single-page app and tracking is broken. Can you fix it?
Yes. Single-page apps need virtual pageviews and history-based triggers because the page never fully reloads, which is why default tracking under-counts. I rebuild the triggers so every route and interaction is captured correctly.
Do you build custom GTM templates?
Yes. Sandboxed custom templates are safer and easier to maintain than custom HTML tags, and they keep your container clean. I build them for repeatable tracking patterns your team can reuse.

Need something
custom?

Let's build the tracking, automation, or integration that solves your unique challenge.

Email

contact@ffgcvs.com

LinkedIn

linkedin.com/in/ffgcvs