Proposal · June 10, 2026 Prepared by Jason · Axis Labs For: GHL Agency — Senior Full-Stack Partner

GHL's API is just the beginning.
Production systems are what you ship.

A senior full-stack partner for the work GHL can't do natively — multi-tenant dashboards across every client subaccount, webhook-driven business logic, Stripe and Twilio integrations that survive production load, and the internal tooling your team actually needs. Architecture decisions made with you. Code shipped without supervision.

N → 1
Subaccounts aggregated · one platform
Event-first
Webhooks & queues · not polling
Node · PG · Redis
Preferred production stack
Owner
Design · ship · maintain · document
Reference Architecture

The shape of a real multi-account GHL platform.

Below is the architecture I'd reach for on a typical custom GHL build — the kind of system your post describes. Every layer solves a real failure mode in the naive approach (GHL UI + a few Zaps). Hover any node to see what it solves and how it works.

SUBACCOUNTS · N GHL Client Locations EXTERNAL APIS Stripe · Twilio · Custom AUTH · OAUTH 2.0 Agency App · PIT Refresh LAYER 1 · INGESTION Webhook Receiver · API Poll Sync EVENT QUEUE · BULLMQ Retry · Idempotency · Backpressure LAYER 2 · BUSINESS LOGIC Node.js Services · TypeScript Lead routing · Sync · Billing · Custom workflows POSTGRES Multi-tenant schema REDIS Cache · Rate Limits OBSERVABILITY Logs · Traces · Alerts LAYER 3 · UI + API Next.js Dashboard · REST + Webhooks Out
Start Here
Hover any node →
Without this: custom GHL projects get built one Zap and one cron job at a time, then break under their own weight when subaccount count or webhook volume scales.
With this approach: every layer is a deliberate choice that solves a known failure mode. Hover any node to see what it replaces and why it's there.
How A Typical Build Runs

From spec to ship. Phase by phase.

This is the engagement pattern for a custom GHL build under my ownership. Each phase has concrete deliverables you sign off on before the next begins. Pattern adapts to scope — dashboard, SaaS layer, internal tool, integration — but the shape holds.

🧭
Phase 1 · Week 1
Discovery + Architecture
  • Stakeholder interviews — agency owners, ops, account managers, target end-users
  • GHL API capability audit — what's native, what's missing, what needs wrapping
  • Architecture diagram, data model, integration boundaries, build-vs-buy calls
  • Risk register — auth/refresh edge cases, webhook ordering, rate limits, multi-tenancy gotchas
🏗️
Phase 2 · Weeks 2–3
Foundation · Auth, Tenancy, Schema
  • OAuth 2.0 agency app — install flow, PIT/token refresh, secure key storage
  • Multi-tenant Postgres schema — strict isolation, audit trails, migration discipline
  • Auth + user mgmt — role-based access, agency vs. subaccount scoping, SSO-ready
  • Infra baseline — Docker, CI/CD, staging/prod, secrets, observability from day one
📡
Phase 3 · Weeks 3–4
Ingestion · Webhooks + Sync
  • Webhook receiver for every relevant GHL event across all subaccounts
  • BullMQ queue with retry, dead-letter, idempotency keys — no lost events on transient failure
  • API poll sync for resources GHL doesn't webhook reliably, with delta-detection
  • Backfill jobs — bring existing subaccount history into the unified schema cleanly
⚙️
Phase 4 · Weeks 4–5
Business Logic + Integrations
  • Lead distribution, routing rules, qualification flows specific to client verticals
  • Stripe — subscription, usage-based billing, invoicing, dunning, webhook reconciliation
  • Twilio — SMS/voice flows that survive GHL's native limitations, with retry + DLR tracking
  • AI integrations where useful — Claude/OpenAI for parsing, classification, generation
📊
Phase 5 · Weeks 5–6
Dashboards, Reporting, Handoff
  • Next.js multi-tenant dashboard — agency-wide view + per-subaccount drilldown, role-scoped
  • Reporting + analytics — cross-account funnels, lead source attribution, ROI per client
  • Internal admin tooling — provisioning new subaccounts, billing controls, support views
  • Documentation, Loom walkthroughs, runbooks — your team can extend without me, but I'm there when you want me to
Engagement Model

Long-term partner. Per-project shape.

I work best as a senior engineering partner — embedded enough to own architecture, independent enough to ship without daily check-ins. Typical cadence below; structure (retainer, fixed-scope, hourly) adjusts to what your agency runs cleanest on.

01

Project Kickoff

30-minute scoping call → 2-page brief with success criteria, milestones, and risks. You sign off before any code is written.

Day 0–2
Aligned scope
02

Architecture & Spec

Architecture diagram, data model, API contracts, and risk register reviewed with you. No code without a signed-off plan.

Week 1
Decision-ready
03

Build · Weekly Demos

Working software shipped to staging every Friday. Demo + retro every Monday. You see momentum and steer before drift compounds.

Weeks 2–5
Visible velocity
04

Production Cutover

Deploy to production behind feature flags, gradual rollout, instrumentation live. Runbooks delivered. Your team trained.

Week 6
Live + owned
05

Retainer · Ongoing

Net-new features, optimization, and on-call architecture support. The system keeps evolving without a re-onboarding tax.

Ongoing
Partner mode
Next Step

Let's pick a real project and walk it together.

A 30-minute call where I share my screen, walk you through the architecture above against one of your actual upcoming builds, and surface the risks I'd flag before you write the spec. I'll also share past GHL builds — real workflows, real subaccount tooling — so you see how I actually operate.

Email Jason → Book the call Re-read the architecture ↑