Technical Proposal — Architecture & Stack

client client-demo v1 by andre Mar 23, 2026 technicalproposalarchitecture

Recommended Stack

Based on our analysis of your requirements (performance, SEO, maintainability), we recommend:

Layer	Technology	Why
Frontend	Next.js 15 (App Router)	Server components for SEO, React ecosystem, excellent DX
Styling	Tailwind CSS 4	Rapid iteration, design-token-based, purges unused CSS
CMS	Payload CMS (headless)	Self-hosted, markdown support, REST + GraphQL API
Hosting	Vercel	Edge network, automatic previews, zero-config deploys
Chat	InboxAI (Cofoundy)	AI-powered lead capture, multi-channel, BANT qualification
Analytics	Plausible	Privacy-first, GDPR compliant, lightweight (< 1KB)

Architecture

graph TB
    subgraph "Client Browser"
        UI[Next.js Frontend]
        Chat[InboxAI Widget]
    end

    subgraph "Vercel Edge"
        SSR[Server Components]
        API[API Routes]
    end

    subgraph "Backend"
        CMS[Payload CMS]
        DB[(PostgreSQL)]
    end

    subgraph "Cofoundy Services"
        Inbox[InboxAI Backend]
        AI[Claude AI]
    end

    UI --> SSR
    SSR --> CMS
    CMS --> DB
    Chat --> Inbox
    Inbox --> AI
    API --> CMS

Performance Budget

Resource	Budget	Strategy
JavaScript	< 150 KB	Code splitting, tree shaking, dynamic imports
CSS	< 30 KB	Tailwind purge, critical CSS inlining
Images	< 500 KB/page	Next.js Image optimization, WebP/AVIF, lazy loading
Fonts	< 80 KB	Variable fonts, `font-display: swap`, preload
Total page weight	< 800 KB	Target: Lighthouse 95+

Security Measures

HTTPS everywhere — enforced via Vercel + HSTS headers
CSP headers — strict Content Security Policy
Input sanitization — all CMS inputs validated server-side
Rate limiting — API routes protected (100 req/min/IP)
Dependency auditing — automated via GitHub Dependabot

Delivery Approach

We work in weekly sprints with visible progress:

Week 1-2: Design phase — wireframes → visual mockups → client approval
Week 3-4: Build phase — frontend + CMS, deployed to preview URL daily
Week 5: Integration — chat widget, analytics, SEO
Week 6: QA + launch — testing, UAT, go-live

You’ll have access to a live preview URL from day 1 of development, updated with every change.

Review this proposal and let us know if you’d like to discuss any technical decisions. We’re flexible on the stack — these are recommendations, not requirements.