Jonny Longden

Digital Experience Director | Helping you put experimentation at the heart of your business | Top Experimentation Influencer

My career has been driven by a singular obsession: fundamentally changing the way the business world makes growth and innovation decisions. For nearly two decades, I've forged a unique path using data and experimentation to ignite digital innovation and elevate customer experience.

While the term 'experimentation' has gained traction, I've observed a profound disconnect in its application. Too often, it's relegated to superficial A/B testing or seen as a tactical tweak, failing to deliver its true potential as a strategic driver of growth. This narrow focus leads to siloed learning, unquantifiable investment, and continued reliance on opinion and guesswork for critical business decisions.

This is why I champion Experimentation-Led Growth (ELG). At its core, ELG is about moving beyond mere 'optimisation' to build robust, evidence-driven operating systems for sustained business impact. It's about empowering organisations to de-risk ambitious innovation, accelerate learning velocity, and generate compounding commercial outcomes. My work focuses on integrating Growth Experimentation Systems & Engineering – connecting the strategic vision, the operational infrastructure, and the customer insights to ensure every investment drives tangible, measurable progress.

My unique blend of agency, client-side, and management consultancy experience at senior levels has equipped me with a holistic view of the digital landscape. From leading product analytics for Visa Checkout and building high-impact product discovery teams at Sky, to owning the P&L for front-end Digital Product at Boohoo Group, as well as scaling a digital experience consultancy from scratch, I've consistently applied an experimentation mindset to unlock significant commercial value.

I partner with visionary leaders – VPs of Growth, Product Directors, Digital Directors, and C-suite executives – who are determined to move past the limitations of traditional approaches. If you're looking to transform how your teams learn, ship, and grow; if you're seeking to embed genuine evidence-based decision-making across your organisation; or if you want to unlock step-change velocity and impact from your digital investments, let's connect. I'm keen to share insights and explore how a Growth Experimentation approach can redefine your trajectory.

Contact me at jonny@speero.com or +44 777 909 6222 to find out how we can help you grow.

Director, Digital Experience Services

90% of all changes made to websites are based on opinion and are a waste of time and money because…

It is impossible to know 1000s of customers
Your opinion is deeply biased
You can’t rationalise the irrational

Regardless of the size of your business, the answer is to put data and experimentation at the heart of your development operations. 

We help you do that. 

We take the guesswork out of decision making and provide consultancy and training, systems and frameworks, and experimentation agency services to help you reach your full growth potential.

Email me to learn how to put experimentation at the heart of your business: jonny@journeyfurther.com
Subscribe to my newsletter: jonnylongden.com/newsletter

The hot topic in our industry right now is Agentic Synthetic Testing.

Imagine this: You upload two designs. The system spins up 100,000 AI agents. It gives each one a backstory: "You are a 54-year-old from France, low digital literacy, poor eyesight, looking for a bargain." It runs the simulation. It tells you Version B won. It takes 5 minutes.

No traffic needed. No waiting. Instant statistical significance.

This technology is incredible. It is coming. And it will be valuable 𝗮𝘀 𝗹𝗼𝗻𝗴 𝗮𝘀 𝘆𝗼𝘂 𝘂𝗻𝗱𝗲𝗿𝘀𝘁𝗮𝗻𝗱 𝘄𝗵𝗮𝘁 𝗶𝘁 𝗿𝗲𝗮𝗹𝗹𝘆 𝗶𝘀.

If you treat this as "proof," you are making a mistake.

An AI model is a probability engine trained on what has already happened. It aggregates the "average" of the entire internet. When you test with synthetic users, you aren't testing reality - you are testing against a massive database of heuristics and best practices on steroids.

You are optimizing for the average. You are engineering mediocrity.

Use it for speed: Use it to squash bugs, check accessibility, or filter out terrible ideas before they launch. Use it if you don't have the volume of traffic to do real tests. 

Don't use it for truth: It cannot predict the irrational, messy, emotional behavior of a real human being reacting to a new market condition or a brand new innovation.

Synthetic testing is a map. It is not the territory. By all means, use the map. But don't forget to look out the window at the real world occasionally.

#experimentation #growth #experimentationledgrowth #growthexperimentation #ai #generativeai #productivity

Chief Growth Officer @ Speero | Growth Experimentation Systems & Engineering | Product & Digital Innovation Leader

Dash of CX

I provide Experimentation (CRO) and User Research Services for online stores. 
As a freelancer, I collaborate with both brands, and agencies.

Overall, I have 10+ years in Data, UX & CRO, and clients have rated my services with a global top 1% score (NPS 75).

▪️ After getting fully booked up in 2022, I now partner with CRO Research specialist Laura Algo. As a freelancing duo, we have extra skills, creativity and time to service clients. 
▪️ We love to help purpose-driven eCommerce stores learn and grow with CRO/Experimentation and User Research.


--- Results: 
▪️ Recently a CRO program that we run drove +multi-million euros in additional revenue for our client, a ROI of around 19:1.

---  Featured in the Industry:
▪️ Published content on Hotjar & Convert.com 
▪️ Talked at industry events: 
VWO
Experiment Nation
MeasureCamp London
Conversion Rate Conference 

👉 Book a chat to discuss your CRO project here: https://calendly.com/dashofcx/30min

Freelancer / CRO Specialist for eCommerce

I've mentored a few CRO Specialists, upskilling them on all areas of CRO such as:
▪️ How to launch and run successful CRO programs, with stakeholder engagement
▪️ How to get the most out of User Research, and apply learnings
▪️ How to do strategic CRO and get trustworthy results
▪️ How to do CRO efficiently (with automation) and avoid mistakes

CRO Mentor

Loop Earplugs

• Collaborating on the CRO program, to bolster the company's award-winning growth
• In 2024, the CRO team won the gold Best in Test award, from Guess the Test

Freelance CRO Researcher/Speciliast

ELLOS GROUP

Co-running the CRO Programs for the eCommerce group, including Ellos.se 
💹 Produced strong ROI from the optimization program within 6 months, approx 19:1 ROI
📒 CRO tests uncovered over 15 key insights in the first 6 months
✔️ A/B test ideation, planning, launch, analysis (Adobe Analytics & Adobe Target)
✔️ Maintaining a knowledgebase of user research and CRO test-insights (Airtable)
✔️ CRO activities are driving significant uplifts in Revenue Per Visit

CRO Consultant

COMBO!

- Providing Conversion Optimisation and User Research services for Combo! agency.

Freelance CRO Consultant

Perk Clothing

Leading the CRO Program for US apparel brand, perkclothing.com
🔬 Ensure tests are user-focused, strategic and trustworthy: enabling high win-rates
🎯 Defined 6 CRO Strategy Themes - based on CRO Research
👨‍💻 Log key site updates to improve UX

📒 Multiple research sources have produced over 100 insights logged in 9 months - powering the CRO program

Freelance CRO & User Research

Exceptional Web

💬 Client Testimonial:

"The team is amazing. Delycia and Chris took care of everything and walked me through reviews of A/B tests, gathered feedback from customers, and presented theories that we could explore to create even better experiences that were more lucrative for us.

The best part was that our brand was always respected and our customers were never inconvenienced. You guys had a touch that made me confident I could trust that you were genuinely part of our team and not just working for us." 
- Jason Wieland, Co-Founder, ILNP Cosmetics Inc

White-labelled CRO for digital agency

Fabric Behavior Design

Consulting on experimentation process and design.

Experimentation Consultant

Oddit

Provided UX & CRO advice for the Oddit Newsletter, and Oddit's private Slack Club for entrepreneurs.
Helped DTC brands grow in a customer-centric way, and avoid the traps of hacks and guessing. 

Here's some feedback I received:

-  "Thanks, that's epic feedback!"
-  "Legend! Thanks so much for all of this."
- "Really appreciate all the information here. You are a star."

☝️Above: Feedback from eComm managers and founders.

UX & CRO Consultant

Spacer.com.au

Conversion Rate Optimization and UX guidance for Spacer.com, and Parkhound.com.au
✔️ Helping my client find valuable insights for their business and run a CRO program
✔️ Subject-matter expert for web analytics, UX and experimentation (Google Analytics/Optimize)

Optimisation Consultant

ILNP Cosmetics

Conversion Rate Optimization and User Research activities for a popular indie nail polish store ilnp.com
👉 Colab Highlights: 10+ Research Projects, Dozens of usability and test opportunities uncovered
✔️ A/B testing ideation, planning, launch, analysis (Google Optimize & Airtable)
✔️ Helped bring stakeholders closer to the customers and provided dozens of actionable insights 
✔️ The most successful test lifted conversions by +28%

Conversion Rate Optimization & User Research

eCommerce CRO & User Research - Freelance / Consultant

We're two specialists providing CRO & UX solutions for eCommerce stores.

▪️ 7+ years of experience providing CRO & UX services (freelance since 2020)
▪️ 12+ years of experience uncovering value from Data/UX
▪️ Rated Top 20 CRO to meet - by Experiment Nation

I partner with CRO Specialist Laura Algo.
As a duo, we have extra skills, creativity and time to service clients.
We love to help purpose-driven eCommerce stores learn and grow with CRO/Experimentation and User Research.

Since 2017 my clients have added millions in additional revenue to their bottom line, thanks to strategic CRO & UX
• Clients I've worked with include:
   Loop Earplugs, Casper Mattresses, The Open University, Ellos, Jotex, Perk, Ford, Jimmy Choo, Microsoft Surface

Featured in the industry:

🟪 ConversionWise - Podcast - Advanced CRO Techniques:
  https://www.youtube.com/watch?v=hzUkOUmrIfY
🟪 Hotjar - UX Guide
  https://www.hotjar.com/website-problems/ux/
🟪 VWO - Webinar: I Added +$3M to Client Revenue With CRO & UX
   https://vwo.com/webinars/million-client-revenue-with-cro/
🟪 Convert.com - Shopify Image Optimization Guide
   https://www.convert.com/blog/shopify-conversion-optimization/shopify-image-optimization-guide/
🟪 Experiment Nation - 7 tips for CRO Program Success
   https://www.youtube.com/watch?v=-O3nMGJmuaQ
🟪 Fresh Egg - The Six Steps of Running a Successful CRO Campaign
     https://www.freshegg.co.uk/blog/conversion-services/the-six-steps-of-running-a-successful-cro-campaign/
🟪 Lessons From 17 CRO Experts:
https://www.omniconvert.com/blog/lessons-from-cro-experts/
🟪 Top 20 CRO to meet
https://experimentnation.com/2022/11/26/the-top-20-must-meet-cros-of-2022/

📊 Results
▪️ Recently, a CRO program that we co-run drove +multi-million euros in additional revenue for our client, an ROI of around 19:1.

🎤 Spoken at industry events
  VWO
  Experiment Nation
  MeasureCamp London
  ConversionWise
  Conversion Rate Conference

⭐ My Values 
Learning, Creativity, and Integrity

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