Software
From idea to paying subscribers: multi-tenant architecture, billing, onboarding and the product roadmap to keep going.
You have the idea, customers who said they would pay, and no technical co-founder. Superstack is the one you can hire: SaaS product development NZ founders and established businesses use to go from a one-page idea to a product that signs up customers, bills them monthly and keeps improving, with every architecture decision explained plainly.
a product idea with nobody to build it
SaaS product development from MVP to scale
To build a SaaS product you need three things: the feature customers pay for, the plumbing that lets many customers share one system, and the machinery of plans, trials and invoices. We build all three, in the order that gets you to paying customers soonest.
01 of 9
We start by writing down who the first paying customer is, what they do today and which job the product must do better. That becomes the MVP scope and a roadmap. A founder building rostering software for care providers leaves with a one-page scope, not a wish list.
02 of 9
Every customer shares one codebase and one deployment, but their data is walled off from everyone else's, not just hidden in the interface. That makes multi-tenant SaaS development cheap to run: one upgrade reaches every customer, and a new sign-up adds a row, not a server.
03 of 9
Customers sign up with email or their Google or Microsoft account, invite colleagues into a team and give each person a role. The account owner sees billing and adds users. A staff member sees only the work. Two-factor authentication and single sign-on are ready for larger customers.
04 of 9
Stripe handles the card, the recurring charge, failed payment retries and the invoice. We build the plans around it: a starter tier, a team tier and an annual enterprise tier. When a customer upgrades mid-month, the proration is automatic and the revenue lands in your accounting software without anyone keying it.
05 of 9
The first session decides whether a trial converts. We design the sign-up so a new customer reaches the moment of value fast: sample data, a guided first task and a checklist of what to do next. Trials end with a prompt to pick a plan.
06 of 9
This is what customers pay for, and it gets most of the budget. We build it in short cycles, showing you working software as we go, not a demo at the end. For a compliance product, the inspection form, the scoring and the report are usable before the marketing site exists.
07 of 9
Your own admin console shows every tenant, their plan, usage and last login on one screen, where you can extend a trial, apply a credit or see what a customer sees. Product analytics show which features get used and where trials drop off, so the roadmap follows evidence.
08 of 9
Business customers expect the product to talk to what they already use. We connect your accounting software, HubSpot, Slack and Google Workspace, and give your product a public API with keys and documentation, so a customer's IT team can build on it. It is the same API your own app uses.
09 of 9
Launch is a beta with a handful of paying customers, not a press release. We watch the analytics, fix what they trip over and ship improvements in small releases. The same team stays on after launch as your product team, working a roadmap you own.
The workshop is where you and we decide what the product is not. From that comes a one-page MVP scope with a price attached. The build shows you working software throughout. Beta customers use it for real before billing goes live, so the first invoice goes to someone who already relies on the product. After launch, usage data decides what gets built next. You make the product calls. We make the technical ones and explain them.
Stripe takes the payments and drives the plans. Your accounting software receives the revenue and invoices. Google and Microsoft sign-in remove the password step. SendGrid sends the transactional email, Twilio the SMS, Slack the alerts to your team, and HubSpot keeps your pipeline in step with sign-ups. Your customers get a public API.
Any system with an API connects. Click a logo to visit them.
Xero
MYOB
Stripe
Google Workspace
Microsoft 365
Twilio
Shopify
HubSpotAI is optional, even in a SaaS product, and a product that does one job well without it beats one that does three jobs badly with it. When AI is part of what customers pay for, we design for it from the first sprint. See how we use AI and where it belongs in business process automation.
Assistants, summarisation and extraction, built on the same multi-tenant architecture from day one, so each customer's AI only ever sees that customer's data.
The product itself. Your customers and their teams work in it, in any browser, on the plan they pay for. Each tenant sees its own data, users and settings, and nothing of anyone else's.
When your customers' staff work away from a desk, a companion app puts the tasks they do most on a phone, such as logging a visit. It runs on the web app's API, not a second codebase.
Every subscriber gets an account area: change the plan, add or remove users, update the card and download invoices. All three share one database, so a seat added here is billed by Stripe and live in the app.
A technical partner who scopes, builds and stays.
Established businesses productising an internal toolSell the tool your team already relies on.
Industry associationsA member tool, such as CPD logging, funded by subscriptions.
Vertical SaaS for tradesQuoting or compliance software for one trade, sold across it.
CareRostering, incident and client record tools for providers facing the same audits.
EducationEnrolment, attendance or assessment tools sold to schools and training providers.
Quickest start
We customise existing Superstack modules, such as billing, teams and roles or the admin console, as the foundation of your product, so the MVP arrives sooner.
Most common
We combine those foundations with your core feature into a complete product, which is where most subscription software development we do sits: standard plumbing, custom value.
Fully bespoke
A fully bespoke product designed from scratch, for a market where the architecture itself is the advantage: rare data, heavy compliance or serious scale.
It depends on the scope, so the workshop comes first. An MVP with one core feature, sign-up, teams and Stripe billing is a fixed-scope build with a price you see before you commit. The multi-tenant foundation, billing and admin console are already built, so your budget goes on the feature customers pay for. We avoid SaaS MVP development priced by the hour with no scope.
You do. The product, its code, its data and its brand are your company's intellectual property, and our agreement puts that in writing up front. The code sits in a repository under your control, the hosting account is in your name, and the documentation is written for whoever comes after us. Investors ask this early, and the answer needs to be clean.
Yes. We keep a standing allocation of time each month for your product: roadmap features, customer requests, security updates and keeping a live system healthy. You get a named lead who knows the codebase, joins your planning and explains trade-offs in plain terms. When you are ready to hire in-house, we hand over properly, with documentation and a handover period.
The multi-tenant design does most of the work: every customer runs on the same code, so adding the hundredth tenant is the same as adding the second. Hosting runs on cloud infrastructure that adds capacity when load rises. The things that need attention at scale, such as background jobs, caching and reporting queries, we design in early rather than retrofit later.
Business customers will ask, and larger ones will send a questionnaire. We build to answer it: data encrypted in transit and at rest, tenant isolation at the database level, role-based access, audit logs, daily tested backups and hosting in New Zealand or Australia. We document the architecture and controls so you can hand a security summary to a prospect's IT team without a scramble.
No equity. We work for fees, which keeps your cap table clean: you own the product outright. Founders ask because they want a partner with skin in the game. Our version of that is a fixed-scope MVP with a price agreed up front, honest advice about what not to build, and a standing team after launch you can stop at any time.
Built around the way you work.
Your business shouldn't have to fit someone else's software. Tell us how your business works. We'll show you what Superstack can build around it.
Send us your one-page product idea. We'll come back with the MVP scope and what it would take.
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