Zervax CMS

Blog Category: Web Development

Articles on modern web engineering, performance, and headless architectures.

  • Web Performance Checklist: Core Web Vitals for Marketing Sites

    Web Performance Checklist: Core Web Vitals for Marketing Sites

    Marketing sites built with modern frameworks can still miss Core Web Vitals if assets and rendering paths are not disciplined. Use this checklist before launch.

    Largest Contentful Paint (LCP)

    • Preload hero image or critical font files.
    • Serve AVIF/WebP with responsive sizes.
    • Inline critical CSS for above-the-fold content.

    Interaction to Next Paint (INP)

    Break up long JavaScript tasks, defer non-critical scripts, and prefer CSS transitions over heavy scroll listeners on mobile.

    Quick wins

    1. Audit third-party tags quarterly.
    2. Lazy-load below-the-fold media.
    3. Use a performance budget in CI.
    Developer testing website speed on laptop
    Measure on real devices—not only desktop emulation.

    Cumulative Layout Shift (CLS)

    Reserve space for images, ads, and dynamic banners. Avoid injecting UI above existing content after load.

    Performance is a feature your SEO and conversion rates share.

    Our web development team ships performance-first by default.

  • Headless E-Commerce: A Playbook for Flexible Storefronts

    Headless E-Commerce: A Playbook for Flexible Storefronts

    Headless commerce separates presentation from catalog, cart, and order services—giving brands freedom to craft experiences without replatforming core systems.

    When headless makes sense

    • You publish content-heavy campaigns frequently.
    • Multiple frontends share one product catalog (web, app, kiosk).
    • You need regional storefronts with localized UX.

    Architecture components

    1. Commerce API — products, inventory, pricing, checkout.
    2. CMS — pages, blog, merchandising stories.
    3. Storefront — Next.js or similar edge-rendered app.
    4. Search & recommendations — optional dedicated service.
    E-commerce packages prepared for shipping
    Integrate fulfillment early—UX breaks when logistics lags.

    SEO and structured data

    Generate product schema, canonical URLs, and sitemaps from the storefront layer with stable slug rules.

    See our e-commerce solutions for composable storefront delivery.

  • How to Design Scalable SaaS Architecture for Growing Startups

    How to Design Scalable SaaS Architecture for Growing Startups

    Scaling a SaaS product is less about adding servers and more about designing boundaries that stay clear under pressure. At Zervax, we help startups plan architecture before technical debt becomes a growth tax.

    Start with tenant and data boundaries

    Multi-tenant systems need explicit answers to three questions early:

    • How is tenant data isolated (schema, row-level, or hybrid)?
    • Where do shared services live (auth, billing, notifications)?
    • What is the blast radius if one tenant misbehaves?

    Recommended isolation patterns

    1. Row-level security for early-stage products with moderate compliance needs.
    2. Schema-per-tenant when customization per account is high.
    3. Dedicated stacks for enterprise contracts with strict SLAs.
    Engineering team reviewing system diagrams on a whiteboard
    Architecture workshops align product, design, and engineering early.

    API design that survives feature velocity

    Versioned REST or GraphQL gateways with clear domain modules prevent “god endpoints.” Document pagination, filtering, and error contracts from day one.

    Good SaaS architecture feels boring in production—that is the goal.

    Observability and release safety

    Ship with structured logging, tracing, and feature flags. Rollouts should be measurable against SLOs, not gut feel.

    Watch these metrics

    • p95 API latency by tenant tier
    • Background job failure rates
    • Database connection saturation
    • Error budget burn per release

    Need help auditing your SaaS stack? Talk to Zervax about a technical discovery session.