Launch Your SaaS Product With the Architecture to Scale
SaaS product development for Australian founders and enterprises: multi-tenant, subscription-ready and analytics-wired from day one.
What does Custom SaaS involve?
Custom SaaS development, or SaaS product development, is the end-to-end building of a multi-tenant subscription software product, covering tenancy model, billing, onboarding, analytics and an administrative layer, architected from day one to scale with paying customers rather than to be rebuilt once they arrive.
Building a SaaS product is categorically different from building a bespoke internal application. The architecture decisions made in the first three months, multi-tenancy model, billing system design, onboarding flow, permission model, trial conversion logic, will either constrain or enable your growth for the next five years. Getting them wrong is expensive: rebuilding a single-tenant architecture into a proper multi-tenant system after you have paying customers is one of the most painful and risky engineering projects a company can undertake. The cost of that rework is almost always larger than getting the architecture right in the original build.
Our SaaS practice covers product strategy, architecture design, full-stack implementation, and go-to-market readiness. We build for founders launching a first product and for established businesses launching a new one. In both cases, we bring the same discipline: a multi-tenant data model from day one, Stripe-integrated billing with plan management and usage metering from day one, an instrumented analytics layer that tracks funnel performance and feature adoption from day one, and an administrative layer that lets you manage customers without engineering involvement. These are not features we add later, they are part of the initial architecture.
AWLabs is a Sydney based enterprise AI and software development company. Sister company to All Webbed Up, the branding and marketing agency we deliver client work alongside.
Why choose AWLabs for Custom SaaS?
Proper Multi-Tenancy Architecture
Row-level security in PostgreSQL using tenant-scoped policies, schema isolation where compliance requires it, and an application layer that enforces tenancy at every data access point. Tenant isolation is enforced by the database itself, not just by filtering on a tenant_id column in application code.
Stripe Billing, Done Properly
Subscription lifecycle management covering trials, plan upgrades and downgrades, prorated billing, usage-based metering, seat-based pricing, coupon and discount management, invoice generation, dunning email sequences, and idempotent webhook handling. We usually build on Stripe Billing rather than reinventing it.
Product Analytics From Launch
Funnel analytics tracking signup, activation, feature adoption, expansion and churn signals. Integration with Mixpanel or PostHog, plus a custom internal analytics dashboard so your product and growth team can answer questions about user behaviour without submitting data analysis tickets to engineering.
Self-Serve Onboarding That Converts
Activation rate is the most important early metric for a SaaS product. We design onboarding flows that guide new users to the "aha moment" as quickly as possible, with progressive disclosure, contextual tooltips, empty state guidance and in-app checklists, then measure completion rates and iterate.
Enterprise-Ready Security & Compliance
SAML 2.0 SSO and SCIM provisioning for enterprise customers who mandate single sign-on. Audit log trails per tenant. Data export and deletion APIs that support your Privacy Act and GDPR obligations. Role-based access control with permission hierarchies. SOC 2 Type II readiness as a design consideration from the start.
Public API & Webhook Infrastructure
Most successful SaaS products eventually need a public API and webhook system that enables customers to integrate with their own tools. We build this as a first-class platform capability, not a bolted-on afterthought, with API key management, usage-based rate limiting, webhook delivery with retry logic, and a developer portal.
What technologies does AWLabs use for Custom SaaS?
What does the Custom SaaS process look like?
Discovery Audit & Architecture Blueprint
Every build starts with a Discovery Audit ($750 plus GST, credited in full against the build). Through the audit and two strategy sessions we define ICP, core value proposition, must-have features for v1, pricing model, and competitive differentiation. The output is a product architecture blueprint covering multi-tenancy model, billing system design, identity architecture, integration strategy and a phased feature roadmap aligned to your go to market timeline, with a fixed price for an agreed scope.
Design System & Onboarding Flow
We design the brand design system, key product screens, and, most critically, the entire onboarding sequence from signup to activation. Onboarding is prototyped and user-tested before development begins. The activation metric (whatever action defines an "activated" user for your product) is agreed upfront and measured from day one.
Core Platform Development
Authentication, multi-tenant data layer, billing integration, user and organisation management, permissions model, email notification system, and admin panel are built as the platform foundation before feature development begins. These are not glamorous, but they are the difference between a product you can grow and one you have to rebuild.
Feature Development
Building the differentiated features that drive your value proposition. Sprint length is set for each build. You get an update every Tuesday and Friday, Sydney time, with access to test the latest work. Work is prioritised against your ICP's most important jobs to be done and measured against activation and retention hypotheses. We treat every stage as an opportunity to validate product decisions, not just execute them.
Beta Program & Instrumentation
A closed beta with 10 to 30 target customers, with usage analytics active from day one of beta. We review activation funnel data weekly, identify drop-off points, and make targeted UX adjustments before public launch. Billing is live in beta, even if customers are on extended trials, to validate the payment flow.
Public Launch & Growth Infrastructure
Production launch with zero downtime deployment, status page, customer support tooling (Intercom or Crisp), SEO foundations, referral program mechanics, and a documented growth experimentation process. A 30 day warranty runs from launch, and after that a Care Plan can cover ongoing feature development and growth experiments.
Who is Custom SaaS for?
Is Custom SaaS the right solution for you?
When Custom SaaS is the right fit
- You are building a commercial software product that many customers will subscribe to, and the early architecture decisions will shape the next five years.
- You need proper multi-tenancy, Stripe-integrated billing and product analytics designed in from the start, not retrofitted later.
- You want activation and onboarding treated as first-class product concerns with measured conversion, not an afterthought.
- You anticipate enterprise customers who will mandate SSO, audit logs and data export for compliance.
- You have inherited a SaaS codebase that needs an honest audit and a senior team to evolve or stabilise it.
When it is not the right fit
- You need an internal tool for one organisation, a bespoke single-tenant application avoids the cost of multi-tenancy you will never use.
- You are validating an idea and a no-code prototype or landing-page test would answer your question faster and cheaper.
- Your billing is a single fixed price with no trials, tiers or metering, where a much simpler payment setup suffices.
- An existing SaaS product already serves your market well; competing on a near-identical feature set rarely justifies a fresh build.
- You require a native mobile app as the core product rather than a subscription web platform.
Custom SaaS: a quick glossary
- Multi-tenancy
- An architecture where one running application securely serves many customer organisations (tenants) while keeping each tenant's data isolated from the others.
- Row-level security (RLS)
- A database feature that enforces which rows each tenant can access at the database itself, rather than relying only on the application to filter data correctly.
- Subscription billing
- The systems handling recurring payments, trials, plan upgrades and downgrades, prorations, failed-payment recovery and invoicing, typically built on Stripe rather than from scratch.
- Activation
- The point at which a new user first experiences the product's core value; the activation rate is the most important early signal of whether a SaaS product will retain customers.
- Usage-based metering
- Measuring how much of a product a customer consumes (such as API calls or seats) so billing can be tied to actual usage rather than a flat fee.
- SCIM provisioning
- A standard that lets enterprise customers automatically create, update and deactivate user accounts in your product from their own identity system.
Common questions about Custom SaaS
The minimum viable architecture for a SaaS product includes: a multi-tenant data model with proper tenant isolation (not just filtered queries), an authentication system supporting email/password and at minimum Google OAuth, a billing integration with Stripe covering subscription creation, payment failure handling and plan management, a transactional email system for onboarding and notifications, and a basic administrative panel for managing customers. Products that launch without these foundations, particularly billing and admin tooling, create immediate operational problems at the point where you most want to focus on growth. We scope and deliver this foundation as the first stage of the build.
Multi-tenancy can be implemented at three levels: shared schema with row-level security (all tenants' data in the same tables, filtered by tenant ID), schema isolation (separate PostgreSQL schemas per tenant within the same database), or database isolation (completely separate database instances per tenant). Row-level security with PostgreSQL's built-in RLS policies is our default for most SaaS products: it scales to thousands of tenants, enforces isolation at the database level rather than just the application layer, and keeps operational complexity manageable. Schema isolation is appropriate for regulated industries where data separation requirements mandate it. Migrating between these models after launch is one of the most disruptive refactoring efforts in SaaS engineering, which is why the decision needs to be made correctly at the start.
Billing is a domain where off-the-shelf solutions (Stripe Billing, Chargebee, Paddle) are almost always preferable to building your own. The complexity of handling trials, upgrades, downgrades, prorations, failed payments, dunning, tax calculation across jurisdictions, and invoice compliance is genuinely substantial, and getting it wrong has direct revenue and compliance consequences. We usually integrate with Stripe Billing, and sometimes Paddle for products where seller-of-record arrangement (handling GST/VAT compliance globally) is valuable. The engineering effort we save by not rebuilding billing infrastructure is redirected into your product's differentiated features.
A properly architected SaaS product with the core platform (auth, billing, multi tenancy, admin) plus enough product features to validate with your first customers typically takes 20 to 30 weeks to build. Every build is priced on its own scope. It starts with a Discovery Audit ($750 plus GST, credited in full against the build). After the audit you get a fixed price for an agreed scope, paid in three stages against work you have accepted. We never publish day rates. Your Schedule of Work comes with three options (The Minimum, The Recommended and The Complete), so you can decide what goes into the first version.
SaaS products holding personal information about Australians typically operate under the Privacy Act and APPs. Your privacy counsel will spell out the specific obligations that apply to you (privacy policy drafting, collection notices, retention windows, breach response, access requests). On the engineering side, we build the ingredients those obligations rely on, including data export and deletion APIs, retention windows, access logs and the operational hooks for a breach-response procedure, so compliance is implementable rather than aspirational. For products in sensitive sectors (health, finance), additional obligations apply and we scope the technical requirements explicitly during the architecture phase.
Yes. We begin with a technical audit covering code quality, architecture, security posture, test coverage, deployment processes and documentation. The audit produces a frank assessment of what is well-built, what carries technical debt, and what represents immediate risk, along with a prioritised remediation plan. Inherited products range from well-structured codebases that simply need a more senior team to evolve them, to products where the first priority is fixing critical security vulnerabilities before the next customer is onboarded. We will not agree to take over a codebase without first completing the audit, because we need to understand what we are committing to deliver.
A SaaS development company designs, builds and often operates a subscription software product on your behalf: product discovery, UX, multi-tenant architecture, billing, onboarding, analytics, security and cloud hosting. You own what we build for you once it is paid for: each part is assigned to you as it is paid for in full, and the full repository and accounts are handed over after the final payment, so the product can move to your own team whenever you are ready.
A SaaS MVP is the smallest version of your product that paying customers can actually use, built to test demand before you invest in the full roadmap. The difference from a throwaway prototype is that the foundations, tenancy, authentication and billing, are built properly so they do not need rebuilding once customers arrive. Our startup MVP development service covers this stage.