Apps Horizon

SaaS Product Engineering

SaaS development for founders and product teams

From MVP to multi-tenant scale.

Overview

We help founders and product teams build SaaS platforms that can grow: from the first MVP that wins early customers to a multi-tenant product with roles, billing, integrations and the admin tooling your team runs the business with.

Every SaaS product needs plumbing that no customer pays for directly: authentication, subscriptions, tenant isolation, audit logs, emails and webhooks. We build those foundations properly the first time, on Node.js, Postgres and proven services like Stripe, so your team can spend its time on the features that set you apart.

What’s included

  • MVP Builds

    A focused first version with the core workflow, onboarding and payments, so you can launch and learn from real customers.

  • Multi-tenant Architecture

    Tenant isolation, roles and permissions designed into the data model, so the product scales from ten customers to thousands.

  • Auth, Billing & Subscriptions

    Sign-up, SSO, plans, trials, invoices and usage-based billing with Stripe and other payment providers.

  • Integrations & Admin Tooling

    APIs, webhooks and third-party integrations, plus internal admin panels for support, operations and reporting.

Who it’s for

  • Founders turning a validated idea into a paid product
  • B2B companies productising an internal tool for other businesses
  • Early SaaS teams that need to re-architect for multiple tenants
  • Indian SaaS startups selling to customers in the US, UK and Europe

How an engagement runs

  1. 01

    Product scoping

    We define the core workflow, the plans you will charge for and the smallest version worth launching.

  2. 02

    Architecture

    Data model, tenancy, auth and billing designed up front, so growth does not force a rewrite.

  3. 03

    Build and launch

    Iterative sprints with staging reviews, ending in a production launch with monitoring in place.

  4. 04

    Scale

    Performance work, integrations and new features as your customer base grows, on a monthly retainer if that suits you.

Technologies we use

  • Node.js
  • GraphQL
  • Postgres
  • Stripe

See the full stack on our Technology page.

SaaS Engineering: common questions

It depends on scope. After a 30-minute discovery call we send a written proposal with a week-by-week timeline. Keeping the first version focused on one core workflow is the fastest route to paying customers.

You do. All code, designs and infrastructure belong to you from day one, and every engagement starts with an NDA and a clear contract.

Yes. We set up cloud infrastructure, CI/CD and monitoring on AWS or Google Cloud as part of the build, in an account you own.

Other services

Let’s build it together

Tell us about your project. We typically reply within 24 hours, and every project starts with a 30-minute discovery call.

Start a project