SaaS & Custom Software Development
We build subscription products and internal systems — the multi-tenancy, the billing, the permissions, and the admin tooling that customer-facing screens depend on.
What is custom SaaS development?
Custom SaaS development builds a multi-tenant software product where one deployment serves many customers, each seeing only their own data. Beyond the customer-facing interface it requires tenant isolation, role-based permissions, subscription billing, and internal admin tooling. Techroniqs has delivered this across engagements including Adaptive Insurance, a US power-outage insurance platform automating policy management and claims, and Stax.fun, a subscription EdTech platform running Stripe billing at 99.9% uptime for over 2,000 monthly active learners.
Key takeaways
- Tenant isolation is the first architectural decision in any SaaS build, and the most expensive one to change later.
- Billing is not a plug-in. Proration, upgrades, failed payments, and refunds are product decisions before they are integration work.
- The admin tooling your own team uses determines your support cost for the life of the product — build it deliberately, not as an afterthought.
- A useful MVP is one complete flow working properly, not every flow working partially.
- Custom software is worth it when your process is a genuine advantage. When it is not, configuring an existing tool is cheaper and faster.
Who this is for
- Founders taking a validated idea to a first paying version.
- Companies whose operations run on spreadsheets and manual steps that a purpose-built system would absorb.
- Existing SaaS products that need a significant new module built alongside an in-house team.
What you get
Every engagement produces these. Anything else is scoped explicitly rather than assumed.
- Multi-tenant architecture
- Tenant model and data isolation strategy, decided and documented up front.
- Subscription billing
- Stripe integration covering plans, upgrades, proration, and failed payments.
- Roles and permissions
- Access control that reflects how your customers actually organise their teams.
- Admin and support tooling
- Internal screens for your team to inspect accounts and resolve issues without engineering.
- Third-party integrations
- The external systems your product depends on, built and monitored.
- Onboarding flow
- Sign-up through first meaningful action, which is where most SaaS products lose users.
Technology stack
Application
- Next.js
- React
- NestJS
- Node.js
- Ruby on Rails
- Flask
Data
- PostgreSQL
- Sequelize ORM
- Redis
- Supabase
Billing and auth
- Stripe
- Clerk
- OAuth
Platform
- AWS
- Vercel
Build, buy, or configure
Custom software is the right answer less often than agencies like to admit. This is the framework we use before recommending a build.
| Option | Choose when | Typical cost profile | Main risk |
|---|---|---|---|
| Buy off-the-shelf | Your process is standard and the tool fits it | Low, recurring per seat | You adapt your business to the tool |
| Configure a platform | Mostly standard with some specific needs | Moderate setup, recurring licence | Hitting a ceiling the platform will not pass |
| Build custom | The process is your competitive advantage | Higher up front, then maintenance | Cost of ownership is permanent |
| Hybrid | Buy the commodity, build the differentiator | Mixed | Integration surface between the two |
If a conversation makes clear that configuring an existing tool would serve you better, we will tell you.
How we build it
- Decide tenant isolation — shared schema, schema per tenant, or database per tenant — before the first table exists.
- Model the billing edge cases early: what happens on downgrade mid-cycle, on a failed card, on a refund.
- Build the internal admin view alongside the customer view, not a year later under support pressure.
- Ship one complete flow to real users before broadening. Adaptive Insurance went to production on a focused claims and policy path rather than a full feature set.
- Instrument the onboarding funnel from launch so you can see where users stop.
- Keep a seed script that creates a realistic tenant, so every developer works against representative data.
Common mistakes
Deferring the tenancy decision
Retrofitting isolation into a live product is a rewrite of the data layer and every query above it.
Instead: Choose and document the isolation model before building.
Treating billing as an integration ticket
Proration, dunning, and refunds surface as production incidents involving real money.
Instead: Specify the billing states as product requirements.
No admin tooling
Every customer issue becomes an engineering task and support cost scales with users.
Instead: Build the internal views as part of v1.
Building every feature to 60%
Nothing is good enough to sell and feedback is unusable.
Instead: Take one flow all the way to production quality.
Custom-building a solved problem
You maintain authentication or billing forever instead of your actual product.
Instead: Use Stripe, Clerk, or equivalent for commodity capability.
Typical timeline
Ranges reflect engagements we have delivered. Scope, integration count, and decision speed on your side move these more than anything else.
1. Discovery and architecture
1–3 weeksTenancy model, data model, billing states, and scope.
2. Core flow to production
4–8 weeksOne complete path live for real users.
3. Expansion to v1
8–20 weeksFull feature set, admin tooling, and integrations.
4. Operate and grow
OngoingMonthly delivery against a roadmap.
Where we have done this
Adaptive Insurance
InsurTechPower outage insurance platform automating policy management, claims processing, and third-party verifications for US homeowners.
Read the case studyStax.fun
EdTechPolyLabs
AI-powered, block-based coding platform making programming accessible and fun for kids — inspired by Scratch.
Read the case studyVibeSEO
AI / LLMAI-powered SEO automation tool for JavaScript-heavy web apps. Performs automated audits and generates AI-powered SEO reports.
Read the case studyMosaic
FinTechBlockchain API Platform
Enterprise-grade API platform aggregating cryptocurrency market data from 50+ exchanges for financial institutions.
Read the case studyMYAI101
EdTechAI Learning Platform
Interactive AI learning platform for global audiences offering structured courses and hands-on exercises.
Read the case studyWhen this is the wrong choice
Stated plainly, because finding this out in month three costs you far more than reading it now.
- Custom software carries permanent maintenance cost. If your process is genuinely standard, an off-the-shelf tool will serve you better and we will say so.
- We do not build products whose scope is defined only as a clone of an existing competitor.
- Regulated environments requiring formal certification — for example a full SOC 2 or HIPAA audit programme — need a compliance partner alongside us. We build to sound security practice, but we do not hold or issue certifications.
What to consider instead
- Off-the-shelf SaaS
- Your requirement is common and a product already serves it well.
- Low-code platform
- Internal tooling with modest logic and a small user base.
- Techroniqs dedicated team
- You need sustained delivery capacity embedded with your own people.
Frequently asked questions
What does multi-tenancy mean in SaaS?
One running deployment serves many customer organisations, and each sees only its own data. The isolation can be a shared database with a tenant column, a separate schema per tenant, or a separate database per tenant. The choice affects cost, security posture, and how easily you can serve a large customer with unusual requirements, and it is very expensive to change once live.
How much does it cost to build a SaaS product?
Fixed-scope work starts at $2,000 and time-and-material is $20–$35 per hour. A first paying version with authentication, billing, and one complete workflow is usually a several-week engagement; the range is set mostly by how many external systems it must integrate with.
How long until we have something we can sell?
Our approach is to take one complete flow to production quality in roughly four to eight weeks after discovery, rather than building every feature partially. That gives you something real to put in front of customers while the rest is built.
Should we build custom software or buy an existing tool?
Build when the process is your competitive advantage. Buy when it is not. A useful test: if a competitor could adopt the same off-the-shelf tool tomorrow and match you, the process was never the advantage and building it is a cost with no return. We use this framework before recommending a build, including when it points away from one.
Do you handle Stripe and subscription billing?
Yes. Stax.fun, CropTalk, MYAI101, Edi-Mart, GreenPal, and VibeSEO all run Stripe. The integration itself is straightforward; the work is specifying what should happen on upgrades, downgrades, proration, failed payments, and refunds, which are product decisions before they are code.
Can you build an MVP?
Yes, with one caveat about what MVP should mean. A minimum viable product is one workflow that works properly end to end, not every planned feature at partial quality. The second gives you no usable feedback and usually has to be rebuilt.
Are you HIPAA or SOC 2 compliant?
We build to sound security practice — encrypted transport, least-privilege access, no secrets in source control, and audited third-party integrations — and we have delivered platforms handling financial and healthcare data. We do not hold certifications ourselves, and a formal compliance programme needs a dedicated compliance partner working alongside the engineering team.
Related
Talk to an engineer about saas & custom software
A 30-minute call with someone who will be writing the code. We will tell you if we are the wrong fit, and what we would do instead.