Technical SEO Director · 427 Marketing
Jack Stonehouse
Making websites technically sound — fast, crawlable, and built to earn organic growth.
About
Technical SEO with a builder’s mindset
I’m Technical SEO Director at 427 Marketing, an award-winning Sussex SEO agency. For more than a decade I’ve worked across SEO and web development — the go-to when something technical needs diagnosing, fixing, or building properly.
Alongside strong content strategy, I make sure every site we work on is as sound as it can be: clean URL structures, solid crawl paths, and performance that doesn’t hold rankings back. That mix of speed, accuracy, and long-term fixes is what clients feel in the results.
I lead SEO and marketing strategy for local, national, and international businesses, and help run white-label SEO for agencies who need a reliable technical partner.
Focus
Where I spend my time
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Thorough site audits
Finding what actually blocks growth — indexing, architecture, rendering, and the quiet technical debt that compounds.
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Page performance
Diagnosing slow loads and Core Web Vitals issues, then shipping fixes that stick rather than one-off patches.
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Technical foundations
URL structures, crawl efficiency, and on-site SEO that keeps large and small sites healthy over time.
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Automation & tooling
Coding the workflows and bots that take repetitive work off the team — so strategy gets more of the hours.
Beyond work
Family, coast, and community
Away from 427 I spend as much time as I can with my family. I’m an outdoors person at heart — surfing when the Channel allows, and generally happiest near the water.
I’m also a volunteer Community First Responder with South East Coast Ambulance Service (SECAmb), responding to local 999 calls with the Seahaven team — and I run the Seahaven Responders charity that supports that work. When an alert comes in, I go — and I’m proud that flexible work at 427 makes that possible.
Before SEO I worked as a paid senior beach lifeguard with the RNLI in Bournemouth, and volunteered with Seaford Lifeguards — including trainer/assessor and safeguarding roles. Still the best training for staying calm when it matters.
Contact
Say hello
Questions, collaborations, or a technical chat — drop a message below. You can also find me on LinkedIn or read my 427 profile.