SaaS Application Development

What I Mean by SaaS Development

A SaaS (Software as a Service) application is a web application that multiple customers access through a subscription. Each customer gets their own workspace — their own data, their own users, their own settings — while technically sharing the same application infrastructure. Gmail is a SaaS. Slack is a SaaS. Your industry's project management tool is almost certainly a SaaS.

What you're hiring me to build is a custom SaaS product specific to your business model — not a generic tool, but an application your customers will pay a monthly or annual subscription to use. That might be an internal business tool you're productising, a platform serving a specific industry vertical, or a software product you're taking from idea to launch.

This is different from building a one-time web application. SaaS products require specific architectural decisions from the start — particularly around how customer data is separated (tenancy), how billing and subscription management works, and how the system scales as you grow from 10 customers to 1,000.

What I Build

Multi-Tenancy: The Core Architectural Decision

The most important technical decision in a SaaS build is how you implement multi-tenancy — the mechanism that keeps one customer's data separate from another's. Get this wrong and you're either paying for the refactor later or, worse, having a data leak incident.

There are two main approaches, each with trade-offs:

I'll recommend the right approach based on your customer profile, compliance requirements, and growth projections. If you're selling to SMBs, shared-database tenancy is almost always the right call. If you're targeting enterprise or regulated industries, separate databases are worth the added complexity.

Subscription Billing That Actually Works

Billing is the part of SaaS most developers underestimate. It looks simple until you try to handle: trials that convert automatically, subscriptions that upgrade mid-cycle with prorated charges, customers who pause while they sort out budget, failed payments that retry correctly, invoices that need to be sent in specific formats for enterprise procurement teams, and usage-based components layered on top of a flat subscription.

I implement billing using Laravel Cashier (the official Stripe integration) or through Paddle if you're selling globally and want them to handle tax compliance. The implementation covers:

• Free trial periods with automatic conversion
• Monthly and annual plans with upgrade/downgrade logic
• Per-seat pricing (price scales with team size)
• Usage-based billing with metered API calls or resource consumption
• Failed payment retry sequences with smart dunning emails
• Customer portal for self-service subscription management
• Webhook handlers that keep your database in sync with Stripe events
• Revenue reporting and MRR tracking for your own business dashboard

A Real SaaS Project: Rent Life

Rent Life is a property management SaaS I built for landlords and property managers. The core features include tenant management, lease document storage, automated rent collection via Stripe, maintenance request tracking, and a tenant-facing mobile-friendly portal.

The tenancy model is shared database — each landlord has their own workspace containing their properties, tenants, and financial records, all scoped by a global tenant middleware. Billing is per-user: landlords pay a monthly fee per property managed, up to a tier ceiling.

Technically: Laravel 11, MySQL, Redis for session and cache, Stripe for billing, queue workers for automated reminders (rent due, lease expiry, maintenance follow-up), and a Vue.js frontend for the main dashboard. Deployed on DigitalOcean with a staging environment for each release.

How I Approach a New SaaS Build

SaaS products require more upfront architectural planning than other web projects. The conversation I have with clients before scoping covers:

• Who are your customers? — Their technical sophistication, their compliance requirements, their team sizes, their billing expectations
• What is the core workflow your product automates or enables? — I want to understand the day-to-day sequence of what users do, not just the feature list
• What's the pricing model? — Flat rate, per seat, usage-based, or hybrid — this drives significant technical decisions
• What does v1 need to do? — I push for a genuine MVP scope. Most founders have a longer feature list than they need for first revenue. Getting to market faster with a focused product is almost always the right call.
• What does growth look like? — 10 tenants, 100, 10,000? The infrastructure decisions are different at each scale.

Technology Stack for SaaS Projects

Frequently Asked Questions