MVP Development for B2B SaaS

CoreLine builds B2B SaaS MVPs that survive enterprise procurement. Multi-tenant architecture, SSO and RBAC, usage-based billing, and production observability - shipped in 8-12 weeks by senior engineers who've built SaaS products before, not just landing pages.

Product Scoping & Validation

ICP and feature prioritization

Competitive differentiation mapping

Go-to-market technical readiness

SaaS Architecture & Build

Multi-tenant data isolation

SSO, RBAC, and team management

Subscription and usage-based billing

Launch & Growth Engineering

Production deployment and monitoring

Product analytics and activation tracking

Investor demo and data room readiness

Sound familiar?

You've validated the idea with 10 pilot customers but your prototype won't survive a security questionnaire or SOC 2 inquiry

Your technical co-founder left and you need a team that can own the architecture, not just write code to a spec

Investors are asking for a working product with real usage metrics, not another pitch deck with mock-ups

You've tried offshore teams and the output was too slow, too buggy, or architecturally wrong for a multi-tenant SaaS product

How we ship B2B SaaS

B2B SaaS MVPs need to close enterprise deals, not just demonstrate features. We build for multi-tenancy, security questionnaires, and real billing from sprint one - so you can sell to enterprises without rebuilding the product first.

Scope & Architecture for Enterprise Readiness

We define the minimum feature set that proves your value proposition to paying customers. Architecture decisions - multi-tenancy model, auth strategy, billing integration, and data isolation - are locked before development begins.

Build & Validate with Pilot Customers

Two-week sprints with working deployments to a staging environment your pilot customers can use. Product analytics are instrumented from sprint one so you have activation and retention data, not just feature completeness.

Launch, Measure & Fundraise

Production launch with monitoring, error budgets, and security hardening. We prepare investor-ready metrics dashboards, architecture documentation for due diligence, and a technical roadmap that shows scalability without a rewrite.

B2B SaaS outcomes

8-12 weeks
idea to investor-ready product
Production MVP with analytics, billing, and enterprise auth
3 platforms
iOS, Android, web from one codebase
YoungPlanet - React Native cross-platform SaaS launch
6 months
MVP to compliant production
Orah Care - HIPAA-compliant SaaS from concept to live

Good guys. Hard workers, creative, react well to pressure.

Michael Rossman
Co-founder, MachFast
What we work with

Using solutions such as React Native, Flutter, AWS, and many others makes it possible for us to upgrade your product as much as possible and to achieve a thriving collaboration. Here you will find our guide through our most used technologies and case studies related to each one.

AWS

AWS offers the tools to build powerful, flexible, and scalable applications, from compute and storage to databases and content delivery.

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Flutter

Simply put, Flutter is Google’s cross-platform framework that lets you build mobile, web, desktop, and embedded apps, all from a single codebase.

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React Native

React Native is Facebook’s cross-platform framework that combines the best of React with native platform features - perfect for new projects or enhancing existing ones.

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Other technologies we use

PHP
Node.js
Vue.js
React.js

Frequently asked questions

Our MVPs are production SaaS products - just scoped to the minimum feature set that validates your value proposition with paying customers. Multi-tenancy, auth, billing, monitoring, and security are included from day one. The output is deployable and sellable, not disposable.

Yes. We build for enterprise readiness: SSO integration (SAML, OIDC), role-based access control, data isolation between tenants, audit logging, and the security posture needed to pass a procurement security questionnaire. You can sell to enterprises without rebuilding.

We integrate with Stripe for subscription and usage-based billing, including seat management, plan upgrades/downgrades, invoicing, and tax handling. The billing model is defined during scoping so the architecture supports your pricing strategy from day one.

The architecture supports iteration. Feature flags, modular service design, and clean API boundaries mean pivoting is a product decision, not a rewrite. Post-launch sprints can shift direction quickly based on customer feedback and usage data.

Yes. We prepare architecture documentation for technical due diligence, set up metrics dashboards that show the numbers investors care about (activation, retention, expansion revenue), and build the technical roadmap that demonstrates scalability without a rewrite.

ready to start?
Tell us what you need built, modernized, or unblocked. We scope it in one call.