How We Built a Scalable Subscription Platform with Financial Integrations for a Climate-Focused Business

A custom-built platform designed to handle subscriptions, user management, and financial integrations — enabling the business to launch, operate, and scale effectively.

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Overview
Client:

Carma.earth

Headquarters:

England, United Kingdom

Industry:

Climate / Fintech

Project Type:

Platform / SaaS Development

What We Delivered:

Custom subscription-based platform with integrated financial systems

THE PROBLEM

Carma was building a product that required more than a simple website or landing page.

They needed a platform that could:

  • handle recurring subscriptions
  • manage user accounts and data
  • integrate with financial systems
  • provide a reliable and scalable backend

Trying to piece this together using multiple tools or off-the-shelf platforms would have introduced limitations, complexity, and potential issues as the business grew.

There was also a risk of:

  • building something too rigid
  • overcomplicating the initial product
  • or creating technical debt early on

The challenge was to strike the right balance between:
👉 building a strong, scalable foundation
👉 while keeping the product lean and practical for launch

THE SOLUTION

We worked closely with the client to design and develop a custom platform tailored to their product model.

Rather than forcing the business into generic tools, we built a system that aligned with:

  • how the product works
  • how users interact with it
  • how subscriptions and payments are handled
  • how the business would scale over time

We focused on building a clean, structured platform architecture that could support both current needs and future expansion.

WHAT WE BUILT

The platform included:

  • A subscription management system for recurring payments
  • Secure user account system and authentication
  • Financial system integrations to support transactions
  • Backend infrastructure designed for scalability
  • Custom platform architecture tailored to the product

We ensured that:

  • the system was reliable
  • the user experience was smooth
  • and the platform could evolve as the business grows

THE OUTCOME

As a result of the platform:

  • The business successfully launched a functional product
  • Users were able to subscribe and interact with the platform seamlessly
  • Financial processes were handled reliably within the system
  • The platform was built on a foundation that supports scaling

Most importantly, the business now has full control over its product, rather than being limited by third-party tools.

WHY THIS MATTERS

For SaaS and platform-based businesses, the foundation is critical.

Many startups either:

  • overbuild too early
  • or rely on tools that limit them later

A properly built platform allows a business to:

  • launch with clarity
  • scale without rebuilding
  • maintain control over its product and data

This project demonstrates how the right approach to building an MVP or platform can set a business up for long-term success.

CLIENT REVIEW:

★★★★★
"I found their developers technical ability and speed of work the most impressive."
Carma - Bubble.io web app - Custom AI App Agency - Kwayse UK London
Iain Gurney
Co-Founder | Carma

Looking to build a platform or launch a digital product?

We help businesses design and develop platforms, MVPs, and systems built for real-world use and long-term growth.

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