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Farhat Ullah.
SaaS Product Engineering

Multi-tenant products from architecture to deploy.

Start a projectSee what you get

The deliverable manifest.

  1. 01Multi-tenant architecture design and data isolation model
  2. 02Next.js or Laravel product build, front to back
  3. 03CI/CD pipeline setup
  4. 04Monitoring and error tracking wired in from day one
  5. 05Handover documentation someone else can maintain from

What you get

A SaaS product built in Next.js or Laravel, architected around real multi-tenancy from the start — meaning the data isolation model is a design decision made early, not a patch applied after the first tenant complains. That includes the CI/CD pipeline to ship changes safely, monitoring and error tracking wired in before launch rather than after the first incident, and handover documentation written so someone who isn't me can maintain the product going forward.

How it works

Every multi-tenant build starts with the isolation model: how tenant data is scoped, what enforces that scoping, and what happens if that enforcement fails somewhere. From there the build moves through the usual stack — data model, API, frontend — with CI/CD and monitoring set up alongside the product rather than bolted on near launch. If the product already exists and I'm taking over, the same review-before-build approach applies: understand the current architecture and data model before adding anything new.

Who this is for

Founders and teams building a multi-tenant SaaS product who want the architecture treated as seriously as the features, and teams with an existing product who need engineering that can take over cleanly — including products that started as an AI-generated prototype and now need to become something that survives real tenants and real load.

Related work.

01Security

Security audit of an AI-generated Supabase backend

Audited a largely AI-generated Supabase backend before production launch and found four critical issues, including a cross-tenant write path, delivered as a findings report followed by remediation.

AI wrote your backend. Who checked the RLS policies?

Client
US PropTech startup
Year
2025
  • Supabase
  • PostgreSQL RLS
  • Next.js
02Web

Custom WooCommerce rental checkout for a dress-rental business

Built a booking-aware WooCommerce checkout for a dress-rental business, covering rental dates, deposit math, a care-policy consent step and an express-payment UI, to a Figma redesign.

Client
Desi Switch
Year
2025
  • WooCommerce
  • PHP
  • JS
  • Stripe Payment Element

Questions about this service.

Do you build the whole product or just parts of it?
Both — full builds from architecture through deployment, or specific pieces of an existing product, depending on what you need. Multi-tenant architecture and data isolation are usually where I add the most value early on.
What's the difference between a single-tenant and multi-tenant SaaS build?
A multi-tenant product serves multiple customers from one codebase and one database, with isolation enforced in the application or database layer rather than by physically separate infrastructure per customer. Getting that isolation wrong is the single most common serious bug in SaaS products.
Do you set up CI/CD and monitoring, or just write the code?
CI/CD and monitoring are part of the deliverable, not an afterthought. A product that ships without a pipeline or error tracking tends to accumulate undetected regressions.
Can you take over a SaaS product someone else started building?
Yes, generally starting with a review of the current architecture and data model before adding new work, the same way I'd approach taking over an existing Odoo instance.

Ready to start with saas product engineering?

Start a project

Have a system that needs to work in production?

Tell me what's breaking — or what you're building.

Start a projecthello@farhatullah.com
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