SaaS development
SaaS development for products that serve many customers from one platform
A SaaS product is more than an app behind a login. It has to keep each customer's data separate, charge for usage, let customers manage their own users, and let you run and support the whole platform without touching every account by hand.
Theme29 builds SaaS platforms with those foundations in place. We have done it for our own products: PaySuite lets many businesses run separate billing operations on one install, and Karjokrom is a hosted platform serving shops in Bangladesh.
SaaS development services
Multi-tenant architecture
Choosing how tenants share infrastructure and how their data is separated, with enough care that one customer can never see another's records.
Plans, billing and payments
Subscription plans, trials, recurring charges and invoices, connected to the payment gateways your market uses.
Onboarding and account management
Sign-up, workspace creation, invitations, roles and permissions, so customers can set themselves up without your help.
Operator console
An internal admin area to see tenants, support them, adjust plans and watch usage and errors.
The parts of SaaS that are easy to underestimate
These are the areas where early decisions are cheap and late fixes are expensive.
Data isolation and security
Every query, export and background job needs to respect tenant boundaries. We design this into the data model rather than checking it screen by screen.
Roles inside each customer account
Owners, admins, staff and viewers each see the right things. Role-based access is built into our multi-user products.
Usage limits and plan features
The system needs to know what each plan includes, and behave accordingly, without special-casing customers in the code.
Support and observability
Logs, error reporting and tools to reproduce a customer's problem, so support does not depend on guesswork.
Why SaaS as a model
Recurring revenue
Subscriptions turn one-off sales into predictable income, if the product keeps delivering value.
One codebase to improve
Every customer benefits from each release, and you maintain one system rather than many installs.
Lower barrier for customers
Nothing to install or host. Customers sign up and start.
Data to learn from
Anonymised usage shows which features matter and where customers get stuck.
What a SaaS platform usually contains
- Tenant workspaces with separated data
- Sign-up, sign-in and password recovery
- Team invitations and role-based access
- Subscription plans and recurring billing
- Customer billing history and invoices
- Admin console for the platform owner
- Support ticketing or contact workflow
- Email and in-app notifications
- Usage reporting and dashboards
- API for integrations
- Backups and environment separation
- Web app with optional iOS and Android apps
Types of SaaS we can build
Billing and invoicing platforms
Multi-tenant invoicing, estimates, recurring bills and customer portals, like PaySuite.
Retail and POS platforms
Hosted point of sale with inventory, staff and courier features, like Karjokrom.
HR and payroll platforms
Cloud HR for teams across companies and countries.
Community and membership platforms
Hosted systems for clubs, associations and networks.
Vertical software for one industry
A focused product for a single profession or sector, priced per seat or per plan.
How a SaaS project runs
- 01
Validate the product
Who pays, for what, and what is the smallest version worth paying for? We shape a first release around that answer.
- 02
Design tenancy and data
We decide the tenant model, roles, plan structure and data ownership before screens are built.
- 03
Build the core and the business layer
The product itself, plus sign-up, plans, billing and the operator console, developed together.
- 04
Private beta
A small group of real customers uses the platform, so issues surface before you scale marketing.
- 05
Launch and iterate
We help with deployment, monitoring and a release rhythm, and agree ongoing development on the roadmap you choose.
SaaS technologies
Web app
- Laravel
- PHP
- Next.js
- React
- Tailwind CSS
Mobile
- Flutter
- Dart
Payments
- Stripe
- PayPal
- bKash
- SSLCommerz
- Razorpay
Why Theme29 for SaaS
We run SaaS ourselves
Karjokrom is a hosted platform we operate, so we know what running a multi-customer service involves after launch.
Multi-tenant experience
PaySuite is built on a multi-tenant architecture with roles, tickets and recurring billing.
Web and mobile together
We can deliver the web platform and mobile companion apps as one system.
Related work
- PaySuite: SaaS invoice and billing systemMulti-tenant billing with recurring invoices, roles and tickets.
- Karjokrom: POS, HR and courier in one loginA hosted POS, HR and courier platform available in Bengali and English.
- Workpay · client platform, myworkpay.comA cloud HR and payroll platform covering multi-country payroll.
FAQ
Frequently asked questions
What is multi-tenant SaaS?
It means one installation of the software serves many customers (tenants), each with their own separate data, users and settings. It is the standard approach because it lets you improve and maintain a single system instead of one per customer.
Can you turn my existing software into a SaaS product?
Often, yes, but it depends on how it is built. Software written for one organisation usually needs its data model reworked so tenants are separated. We assess this first and give you a realistic view.
Do you handle subscription billing?
Yes. We build plans, trials and recurring billing and connect them to the payment gateways that suit your customers.
Where will the platform be hosted?
That depends on your customers, budget and compliance needs. We discuss hosting during scoping and document the setup so you are not tied to a single provider.
Can I start small and scale later?
Yes, and we recommend it. A good first release covers one core workflow and the tenancy foundations, so growth means adding features, not rebuilding.
Contact
Have a SaaS idea to scope?
Tell us who the customer is and what they would pay for. We will help you define a first release that can be built and tested.
Send a message
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