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SaaS Architecture & Rapid MVP Engineering

From Figma Prototype to a Production SaaS MVP

KaamLabs Product Engineering Practice
2026-10-02
3 min read
Published by KaamLabs
Practical implementation guidance
Primary references where available
THE PRACTICAL ANSWER

A practical guide to from figma prototype to scalable saas mvp in 24 days, with decisions, implementation checks and limitations for business teams.

KAAMLABS • PROJECT GUIDANCEREAD THE CONTEXT
KAAMLABSORIGINAL ARTICLE

From Figma Prototype to a Production SaaS MVP

Custom Software
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SaaS Architecture & Rapid MVP Engineering
3 min read
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AI-Assisted Educational Research • Compiled from Public Sources • As-Is Analysis
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Why Traditional Agency MVPs Fail in India

Speed to market is the only moat for early-stage software startups. The goal of an MVP is not to showcase architectural complexity, but to validate willingness-to-pay from real customers in the shortest possible time.


The 24-Day Sprint Calendar & Milestone Breakdown

CODE
┌────────────────────────────────────────────────────────┐
│              THE 24-DAY MVP SPRINT TIMELINE            │
├────────────────────────────────────────────────────────┤
│  Days 01–04: Scope Freeze & Tokenized Database Schema  │
│  Days 05–10: Core Value Workflow & Server Actions      │
│  Days 11–16: Auth, Multi-Tenancy & Role Permissions    │
│  Days 17–20: Razorpay / Stripe Billing & Webhooks      │
│  Days 21–24: Polish, Security Hardening & Production   │
└────────────────────────────────────────────────────────┘

Milestone 1: Days 1–4 (Scope Guillotine & Relational Architecture)

  • Ruthlessly trim features: identify the single core workflow that solves the customer's primary pain point. Everything else is pushed to v2.
  • Model the relational database in PostgreSQL using Supabase: tables, foreign keys, and indexes.
  • Define Row-Level Security (RLS) policies ensuring tenant isolation from day zero.
  • Milestone 2: Days 5–10 (The Core Engine)

  • Implement the primary business logic using Next.js 15 React Server Components (RSC) and Server Actions.
  • Hook into external APIs (WhatsApp Cloud API, AI inference models, or logistics providers).
  • Ensure end-to-end data flow operates without client-side waterfalls.
  • Milestone 3: Days 11–16 (Authentication & Tenant Security)

  • Integrate Supabase Auth supporting Google OAuth, magic link email, and mobile OTP (critical for Indian enterprise operators).
  • Implement role-based access control (RBAC): Admin, Manager, and Staff roles.
  • Milestone 4: Days 17–20 (Billing & Monetization Rails)

  • Implement Razorpay Subscriptions (UPI Autopay, NetBanking, Credit Cards) for domestic Indian customers.
  • Implement Stripe Billing for international USD payments.
  • Configure idempotent webhook listeners handling subscription renewals, cancellations, and payment failures.
  • Milestone 5: Days 21–24 (Hardening, Speed & Production Launch)

  • Set up domain SSL, Cloudflare edge caching, and automated database backups.
  • Run security audits against SQL injection, CSRF, and data leakage.
  • Verify measured Core Web Vitals across mobile devices and launch to early beta users.

  • The Opinionated Tech Stack Comparison

    Architectural LayerLegacy Traditional Stack (6 Months)The KaamLabs 24-Day Velocity Stack
    Frontend FrameworkReact SPA + Redux + WebpackNext.js 15 (App Router, Server Actions)
    Styling & ComponentsCustom SCSS / Material UITailwind CSS + Headless Radix Primitives
    Backend & DatabaseJava Spring Boot + Oracle / MySQLSupabase Managed PostgreSQL with RLS
    AuthenticationCustom JWT Server with RedisSupabase Auth (OAuth + Mobile OTP)
    InfrastructureManual AWS EC2 + Docker SwarmVercel Edge / Coolify on Hetzner VPS
    Average Delivery Time24–32 Weeks3.5 Weeks (24 Calendar Days)

    Frequently Asked Questions

    How is multi-tenant security handled in a fast MVP?

    Multi-tenancy is enforced directly at the database engine level via PostgreSQL Row-Level Security (RLS). Every database query automatically filters rows by `tenant_id = auth.jwt() -> 'app_metadata' ->> 'tenant_id'`, preventing cross-tenant data leaks.




    Architectural Cross-References & Implementation Guides

    To expand your technical implementation strategy, evaluate these companion engineering blueprints and core platform frameworks:


    Put this into a project brief

    Describe the user task, the current bottleneck, the systems involved and how you will measure a successful result. Ask for a scoped pilot and acceptance checks before expanding the implementation.

    Discuss a website project or explore published client work.

    FREQUENTLY ASKED QUESTIONS

    Essential Takeaways & Clarifications

    Yes. Because the stack utilizes PostgreSQL and Next.js deployed on global edge networks, scaling requires upgrading database compute rather than rewriting application code.

    Use this guidance in context

    Technical examples are starting points for a project review. Platform requirements change, and results depend on implementation and starting conditions. Refer to the linked documentation and test the actual workflow.

    Send a correction with the page URL to hello@kaamlabs.in.

    References Linked in This Article

    Consult the source for current requirements and the context of each referenced statement.

    PLAN YOUR NEXT STEP

    Explore delivery details, project examples and practical buying guidance.

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    KEEP READING

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