Connexease is a SaaS platform that centralizes customer communication across WhatsApp, Telegram, email, LinkedIn, and Twitter into a single inbox. Support teams manage all incoming messages from one interface without switching between tools. At peak, the platform processes around 5 million messages per day.

The Problem

When Connexease came to us, the platform was working but struggling under its own weight. The frontend had grown organically over time into a single, tightly coupled codebase. Every new feature meant navigating the entire application. A change in the inbox view could break the reporting module. Deployments required coordination across the whole team.

As message volume grew, cloud costs grew with it in ways that had nothing to do with actual usage. The infrastructure was not shaped for the real traffic pattern; it was over-provisioned in some areas and underpowered in others.

Developer velocity had dropped. The codebase was a barrier, not a foundation.

What We Built

We rewrote the entire frontend from scratch on a micro frontend architecture using Next.js, TypeScript, Tailwind CSS and Module Federation.

The core idea was to break the platform into independent, domain-owned frontend applications. The inbox, automation workflows, template management, CRM integrations, and reporting each became a separate deployable unit. A team working on the inbox had no reason to touch the reporting module. Deployments became scoped, fast, and safe.

Module Federation made this possible at runtime. Each micro frontend loads independently, shares common dependencies, and composes into a single product experience for the end user. For a platform where new channels and integrations ship regularly, this architecture meant new features could be added without touching the core.

TypeScript across the entire codebase meant type contracts between micro frontends were enforced at compile time. Integration bugs that would previously surface in production were caught before deployment.

Role-based access control was a core requirement. Connexease serves enterprise accounts where different agents, team leads, and administrators need different levels of access. A frontline agent handling WhatsApp conversations should not have access to billing or account configuration. RBAC was built into the architecture from the start, not bolted on after.

The inbox view handles the highest traffic in the product. Agents working on enterprise accounts are processing hundreds of conversations simultaneously across WhatsApp, Telegram, email, and other channels. We rebuilt this view to handle real-time message updates at scale without the UI degrading under load. Rendering was optimized for lists that grow continuously; state management was restructured so new messages did not trigger unnecessary re-renders across unrelated parts of the interface.

On the infrastructure side, we analyzed the actual traffic shape and restructured the cloud deployment to match it. Services that handled burst traffic were sized differently from services handling background processing. The result was a 72% reduction in monthly cloud costs without any degradation in performance.

The Outcome

Cloud costs dropped by 72%. Deployments that previously required coordinating across the whole engineering team became scoped to individual micro frontends. The platform now processes around 5 million messages per day with room to grow.

Connexease's engineering team can ship new features, new channel integrations, and product improvements without the architecture getting in the way.