Can you integrate two tools that don't natively connect?

Usually yes. If both have APIs or webhooks (most SaaS tools do), I build the middle layer that syncs them — often Stripe, HubSpot, Salesforce, QuickBooks, or a custom internal system.

REST or GraphQL for a new API?

REST for simple, cacheable, public-facing APIs; GraphQL when clients need to fetch varied shapes of data or you're combining multiple back ends. I'll match it to how the API is consumed.

How do you secure a public or partner API?

OAuth 2.0 or scoped API keys for auth, JWT for sessions, and rate limiting to prevent abuse — plus input validation and signature verification on webhooks.

Do you handle webhooks and failed-delivery retries?

Yes. I build idempotent webhook handlers with signature verification and a retry/backoff strategy so a momentary outage doesn't lose data.

Can you write into our existing CRM, like HubSpot or Salesforce?

Yes — reading and writing records, syncing contacts and deals, and reacting to their webhooks are common parts of these integrations.

APIs & integrations

API Integration Services

Connect your systems and build the APIs behind them — REST and GraphQL, third-party integrations, webhooks, and OAuth 2.0 — so data moves automatically between the tools you already use.

Email me Chat on WhatsApp

What I build

What's included

Custom API development

REST and GraphQL APIs with versioning, input validation, and OpenAPI docs your other developers can actually use.

Third-party integrations

Stripe, HubSpot, Salesforce, QuickBooks, Twilio, and shipping/payment gateways connected to your app or database.

Webhooks & event sync

Inbound and outbound webhooks with idempotent handlers, signature verification, and automatic retries.

Auth, security & limits

OAuth 2.0, API keys, and JWT, plus rate limiting and scopes so a public API can't be abused.

Problems this solves

Sound familiar?

Two SaaS tools your business relies on that don't talk to each other.
Staff exporting CSVs from one system and importing them into another every week.
Partners asking for an API you don't have yet.
An integration that fails silently because there are no retries or error alerts.

Example use cases

What this looks like in practice

Stripe → database sync

Wired Stripe webhooks to keep an app's subscription state in sync automatically, with signature checks and idempotent handlers.

CRM automation

New leads captured on a site were pushed into HubSpot and announced in Slack — no manual entry, with retries on failure.

Partner API

Built a REST API with per-partner API keys, scoped access, and rate limiting so external partners could pull data safely.

Tech stack

The tools I use for this

Build

Node.js
Express
GraphQL (Apollo)
OpenAPI

Auth & safety

OAuth 2.0
API keys
JWT
Rate limiting (Redis)

Integrations

Stripe
HubSpot
Salesforce
Twilio

Events

Webhooks
Idempotency
Retries

Process

How it works

Map the systems

Identify sources, destinations, and the data that must move.

Design the contract

Endpoints or events, auth, and error handling up front.

Build & harden

Implement with validation, retries, and rate limits.

Document & hand off

OpenAPI docs and monitoring so it stays reliable.

Most integrations I build run on Node.js, and they're part of my wider full stack development work. When an integration needs an LLM in the loop — classifying, extracting, or drafting — I combine it with AI application development.

Related services

FAQ

Questions, answered

Can you integrate two tools that don't natively connect?: Usually yes. If both have APIs or webhooks (most SaaS tools do), I build the middle layer that syncs them — often Stripe, HubSpot, Salesforce, QuickBooks, or a custom internal system.
REST or GraphQL for a new API?: REST for simple, cacheable, public-facing APIs; GraphQL when clients need to fetch varied shapes of data or you're combining multiple back ends. I'll match it to how the API is consumed.
How do you secure a public or partner API?: OAuth 2.0 or scoped API keys for auth, JWT for sessions, and rate limiting to prevent abuse — plus input validation and signature verification on webhooks.
Do you handle webhooks and failed-delivery retries?: Yes. I build idempotent webhook handlers with signature verification and a retry/backoff strategy so a momentary outage doesn't lose data.
Can you write into our existing CRM, like HubSpot or Salesforce?: Yes — reading and writing records, syncing contacts and deals, and reacting to their webhooks are common parts of these integrations.

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.