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B2B Fintech · SaaS · Headless WordPress · Next.js · WP-GraphQL · 2026

How Parsec Capital cut LCP to 1.1s and tripled organic demos on headless WordPress

Parsec Capital migrated their fintech marketing site from a legacy Elementor build to a headless WordPress + Next.js architecture. Organic demo requests tripled and Core Web Vitals moved from amber to green across every template.

Demo requests +212% · LCP 3.4s → 1.1s

Client
Parsec Capital
Industry
B2B Fintech · SaaS
Platform
Headless WordPress · Next.js · WP-GraphQL
Year
2026
Read
9 min
Parsec Capital headless WordPress marketing site with product diagrams and case study modules

Problem

What we found

Parsec's marketing site was running on a heavily-customized Elementor build with 38 active plugins, a 4.2MB initial JavaScript payload, and a Core Web Vitals profile that had drifted from Google's recommended thresholds twelve months before we engaged.

Demo requests had flattened despite a 40% YoY paid-search budget increase. Search Console showed 117 pages stuck in discovered but not indexed status, most of them programmatic landing pages for treasury management, embedded finance, and compliance automation. Organic impressions on commercial-intent queries were declining quarter over quarter.

The technical root causes were familiar: render-blocking JavaScript, late-fetched hero content, schema scattered across plugins with no single source of truth, and an internal linking system that had been bolted on as the site grew. The editorial team had effectively stopped publishing because every change risked breaking layout.

Solution

How we approached it

3-week discovery, mapped every revenue-critical route, recommended a headless rebuild: keep WordPress as content backend, replace the PHP-rendered front-end with Next.js using App Router, server components, and static generation with on-demand ISR.

  • Backend: WordPress with WP-GraphQL, ACF Pro, custom blocks
  • Front-end: Next.js 16 on Vercel, server components for 90% of routes, ISR for product pages, edge runtime for high-traffic templates
  • Schema: Single source of truth generated server-side from ACF data
  • Performance budget: LCP under 1.5s, INP under 200ms, JS payload under 180KB compressed per route
  • Internal linking: Topic clusters around treasury, embedded finance, compliance — every leaf page linking to 6+ contextual peers

Migrated 240 URLs with full redirect map. Four-week stabilization watch post-launch with daily indexing checks.

Outcome

What changed

Within 90 days of launch:

  • Demo requests: +212% YoY
  • LCP: 3.4s → 1.1s (75th percentile, real-user data)
  • INP: 410ms → 168ms
  • Indexed pages: 89 → 247
  • Organic impressions on commercial queries: +84%
  • TTFB: 540ms → 88ms (edge cached)
  • Marketing velocity: team shipped 18 new landing pages in the first quarter (vs. 4 prior)

The editorial team uses the same Gutenberg + ACF workflow they had before. The performance gain came from architecture, not editorial discipline.

The deeper read

Why headless, not a traditional rebuild

We considered three options: clean up the Elementor build, rebuild as custom WordPress theme, or go headless. A traditional rebuild would have solved performance but not the marketing-product disconnect — Parsec's React product app and WordPress marketing site shared no design tokens, no components, no analytics.

Headless solved both. The performance ceiling moved from "good cached WordPress" (200–400ms TTFB) to "edge-cached static" (60–100ms TTFB). For a B2B fintech where the decision-maker is a CFO running comparison searches across six providers, that performance difference matters in real conversion data.

The schema decision that paid for itself

The old site had FAQ schema on six pages and zero SoftwareApplication schema. AI search systems had no clean entity for "Parsec Capital — treasury management platform" to cite. After rebuild every revenue page emits server-generated schema. By month two we saw Parsec cited in AI Overviews for three commercial queries we previously ranked #4–7 for.

Internal linking as growth infrastructure

We built three topic clusters (treasury, embedded finance, compliance), wrote pillar pages, connected every leaf to 6+ contextual peers with descriptive anchor text. Over 90 days, pillar pages moved from positions 8–14 to 2–5, and leaf pages started compounding.

The bigger lesson

A headless WordPress build is an architecture decision, not a feature decision. It earned its keep at Parsec because the brand needed React-grade interaction, sub-300ms TTFB, a shared design system, and operational maturity to run two stacks. For most B2B SaaS brands without those four conditions, a clean traditional WordPress build will outperform a hasty headless one.

Team credits

  • Ajmair Hussain

    Lead architect

  • Marco Linder

    Headless lead engineer

  • Ahmad Hussain

    Technical SEO + content strategy

  • Sarah Bennett

    Editorial design director

Headless WordPressNext.jsWP-GraphQLB2B SaaSFintechTechnical SEOCore Web VitalsSchema strategyInternal linkingAI search

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Parsec needed React-grade interaction patterns inside content, sub-300ms TTFB worldwide, and a shared design system across their marketing site and product app. Traditional rebuild would have solved performance but not the marketing-product disconnect.

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