Outdated technology stack
The paywall frontend was constrained by legacy decisions, including Node.js 16, increasing security and compatibility risks.
Square21We delivered a modernised, scalable and high-performing paywall system for Nevogate — starting with a comprehensive technical audit and culminating in a fully rebuilt frontend aligned with modern best practices. The collaboration ensured that Nevogate now has a reliable, user-friendly and future-proof payment experience that supports their business as it grows.
Nevogate is Hungary's largest online payment orchestration platform, with more than 10 years of market experience. Through a single service, it provides access to the most sought-after domestic and international payment providers and payment solutions, enabling every merchant to find the most suitable payment option. Beyond transaction processing, Nevogate supports e-commerce with market-leading value-added services: intelligent payment provider monitoring for maximum availability, automated settlement processing to reduce administration, online invoicing for paperless operations, and provider-independent link and QR code payments for flexible payment options.
The paywall frontend was constrained by legacy decisions, including Node.js 16, increasing security and compatibility risks.
Heavy use of class components made the code harder to maintain and scale, while overreliance on styled-components led to inconsistent styling and runtime overhead.
A lack of modern form validation, state management and API handling patterns, along with tight coupling between UI and business logic, reduced testability and modularity.
Nevogate needed a more flexible, brandable and reliable paywall that would support multiple payment providers, provide one-click payment options, and handle errors, cancellations and retries gracefully.
We conducted a full codebase review to evaluate architecture, UX flow, maintainability, performance and developer experience. Our audit covered:
The audit concluded with a detailed technical roadmap recommending an upgrade to a modern Next.js version, migration to TailwindCSS, replacing class components with React functional components and hooks, implementing react-hook-form and zod for validation, introducing React Query for caching, and creating a standalone API SDK.
Based on the audit, we implemented a new, modern paywall architecture fully aligned with Nevogate's technical and product goals:
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