01SaaS DevelopmentService 02 / 09

SaaS Development

SaaS platforms built to sell: many customers, one codebase, AI built in.

NebelTech builds and runs multitenant SaaS platforms: tenant isolation, roles, subscriptions and Stripe billing, client portals, integrations, cloud hosting and AI features, from the first version to scaling and support.

What’s included

Fig. 01 · SaaS Development

We design, build and run SaaS products end to end: multitenant architecture with strict data isolation, roles and permissions per customer, subscriptions and payments, client portals, integrations and the cloud it runs on. We add AI where it earns its place, from AI agents and RAG assistants to document intelligence, with guardrails from day one.

Covers · Multitenant SaaS platforms, billing, client portals, AI built in

02Problems

Sound familiar?

What usually brings teams to us for this.
  • 01

    An idea that has to become a product

    You know the problem your customers have. You need a team that turns it into a SaaS product people pay for, and keeps it running.

  • 02

    One customer's data in another's view

    Multitenancy bolted on later is risky. Isolation, roles and per tenant settings have to be designed in, and enforced everywhere.

  • 03

    Billing, plans and portals eat the roadmap

    Subscriptions, invoices, payments to the right account and client portals take months if you build them from scratch every time.

03Included6 parts

What’s included.

For a SaaS we start with the smallest version a customer would pay for, design the tenant model and billing first, then ship in short sprints with a demo every time.
  1. 01Multitenant architectureTenant aware data model, fail closed isolation checks, per tenant settings and roles, so customers only ever see their own data.
  2. 02Subscriptions & paymentsPlans, credits, invoices and payments with Stripe, including Stripe Connect for platforms that collect payments on behalf of their customers.
  3. 03Client & partner portalsSeparate portals for your customers' clients or partners, with their own sign in, documents, requests and payments.
  4. 04AI inside the productDocument intake, grounded summaries, Q&A and assistants built into the workflow, with sources shown and a person confirming.
  5. 05IntegrationsEmail, calendars (Google, Outlook, Apple), file storage, payment providers and the other tools your customers already use.
  6. 06Cloud, DevOps & supportHosting on AWS, CI/CD, monitoring and on call support, so the product keeps running while it grows.
04Work2 projects

Where we’ve used it.

Real projects, current ones first. Open one for the full case study.
  1. 01PerfectLienAIConstruction lien case management for law firms and lien services, with AI built in.Construction · Legal
  2. 02Marina & Boater PlatformMarina portal, boater app and fuel ordering for a European marine services company.Marine
05Stack

Technologies & tools

  • Java & Spring Boot
  • .NET
  • React
  • Next.js
  • Angular
  • MySQL
  • SQL Server
  • Stripe
  • AWS
  • LLMs
06Approach4 steps

How we deliver it.

  1. 01

    Discover

    We dig into your business, users and systems to understand the real problem behind the request.

    • Business analysis
    • Technical audit
    • Scope & roadmap
  2. 02

    Design

    We map journeys and architecture, then prototype the experience so you can see it before we build it.

    • UX flows & prototypes
    • Solution architecture
    • Delivery plan
  3. 03

    Build

    Agile sprints with regular demos. Engineering and QA work side by side so quality is built in.

    • Sprint demos
    • Automated testing
    • Transparent reporting
  4. 04

    Launch & evolve

    We release with confidence, then monitor, support and keep improving the product with you.

    • Go live & migration
    • Support & maintenance
    • Continuous improvement
07FAQ5 questions

Common questions.

What is a multitenant SaaS platform?

One application and codebase that serves many customers (tenants). Each tenant has its own users, data, settings and billing, and can never see another tenant's data.

Have you built SaaS products before?

Yes. Our engineers work on PerfectLien, a multitenant construction lien SaaS with a client portal, Stripe Connect billing and six AI features, and on a marina platform that runs four web portals from one codebase with subscriptions and wallet payments.

How do you handle subscriptions and payments?

Usually with Stripe: plans, credits, invoices, webhooks and reconciliation, and Stripe Connect when the platform collects payments for its own customers. Other providers can be added where needed.

Can you add AI to our SaaS product?

Yes. AI document intake, summaries, Q&A and assistants can be built into an existing SaaS, with the source of every answer shown and a person confirming before anything is saved.

Can you take over and improve an existing SaaS?

Yes. We start with a technical review, fix what's risky first, then keep shipping new features and run it in production.

08ContactReply within one business day

Ready to start with SaaS Development?

We’ll come back within one business day with how it could work, who would build it and what it would take.

contact@nebeltech.us · +1 (469) 927 8718

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