Technical CRO Manager (Frontend Experimentation)

Harnham; Macclesfield; Hybrid; GBP 36,000 - 65,000; Full time

Benefits offered by this job

Remote-first

2 days in Macclesfield per month

Private medical insurance

Gym membership

Life insurance

Team socials and events

Clear progression opportunities

Job summary

Harnham is hiring a Technical CRO Manager to build and lead an in-house CRO capability across 40+ high-traffic journeys. You’ll own the experimentation roadmap and drive measurable commercial impact through hands-on front-end testing and strategy.

In this role you will combine experimentation expertise with strong commercial thinking, conducting end-to-end testing using JavaScript/HTML/CSS and deploying tests via Convert.com or similar platforms. Remote-first with on-site days in Macclesfield.

Qualifications

• 5+ years dedicated CRO experience.
• Experience running end-to-end experimentation programmes.
• Strong A/B testing and experimentation methodology knowledge.
• Strong statistical understanding and test analysis skills.
• Commercial mindset focused on revenue and profitability.
• Excellent understanding of UX and customer journey optimisation.

Responsibilities

• Own the CRO and experimentation roadmap across multiple brands.
• Design, build, and analyse A/B testing programmes.
• Create a structured, high-velocity testing pipeline.
• Build and validate experiments using HTML, CSS and JavaScript.
• Manipulate the DOM and deploy front-end tests using Convert.com or comparable platforms.
• Use behavioural analytics tools to identify optimisation opportunities.
• Prioritise testing opportunities based on commercial impact, traffic volumes and lead quality.
• Present recommendations and business cases to senior stakeholders.
• Work closely with Marketing, Technical and Compliance teams to drive growth.

Skills

CRO experience

A/B testing

Statistical thinking

UX optimization

Commercial mindset

Front-end testing

Tools

JavaScript

HTML

CSS

Convert

Optimizely

VWO

AB Tasty

Mouseflow

Clarity

FullStory

Job description

I'm hiring a Technical CRO Manager for one of the UK's leading customer acquisition businesses.

This is a rare opportunity to build and own an internal CRO capability from the ground up, taking responsibility for experimentation across multiple high-traffic lead generation brands while helping shape the future of the CRO function.

Unlike many CRO roles, this isn't purely strategy and analysis. They need someone who can combine experimentation expertise, commercial thinking, and hands-on front-end testing skills.

I'm hiring a Technical CRO Manager for one of the UK's leading customer acquisition businesses.

This is a rare opportunity to build and own an internal CRO capability from the ground up, taking responsibility for experimentation across multiple high-traffic lead generation brands while helping shape the future of the CRO function.

Unlike many CRO roles, this isn't purely strategy and analysis. They need someone who can combine experimentation expertise, commercial thinking, and hands-on front-end testing skills.

The company

A fast-growing international marketing and technology business operating across the UK, USA, Canada, Australia, and France.

They own and operate their own digital brands rather than acting as an agency, giving them complete control over customer acquisition, experimentation, and optimisation across the customer journey

With 40+ lead-generation journeys and significant investment into paid search and paid social, there is huge scope to drive measurable commercial impact through experimentation.

The opportunity

The business has invested in CRO through external contractors for the last couple of years and is now bringing the capability in-house.

You’ll take ownership of:

• The CRO roadmap
• Experimentation strategy
• Testing frameworks
• Front-end test implementation
• Future team growth

As the function matures, there is a genuine opportunity to build and lead a dedicated experimentation team.

What you'll be doing

• Own the CRO and experimentation roadmap across multiple brands
• Design, build, and analyse A/B testing programmes
• Create a structured, high-velocity testing pipeline
• Build and validate experiments using:
  • HTML
  • CSS
  • JavaScript
• Manipulate the DOM and deploy front-end tests using Convert.com or comparable platforms
• Use behavioural analytics tools such as Mouseflow, Clarity and FullStory to identify optimisation opportunities
• Prioritise testing opportunities based on commercial impact, traffic volumes and lead quality
• Present recommendations and business cases to senior stakeholders
• Work closely with Marketing, Technical and Compliance teams to drive growth

What they're looking for

Must-haves

• 5+ years dedicated CRO experience
• Experience running end-to-end experimentation programmes
• Strong A/B testing and experimentation methodology knowledge
• Strong statistical understanding and test analysis skills
• Commercial mindset focused on revenue and profitability
• Excellent understanding of UX and customer journey optimisation

Technical requirements

• 3+ years commercial experience using:
  • JavaScript
  • HTML
  • CSS
• Experience implementing front-end tests yourself
• Experience with Convert, Optimizely, VWO, AB Tasty or similar platforms
• Experience using session replay and behavioural analytics tools

Nice to have

• Lead generation experience
• Agency experience
• Previous mentoring or team leadership exposure
• Experience helping build CRO functions

Why this role?

• Build an internal CRO capability from scratch
• Own experimentation across 40+ customer journeys
• Significant leadership backing for CRO investment
• Genuine progression into team leadership
• High levels of autonomy and ownership
• Blend of strategy, experimentation, front-end development, and commercial impact
• International business with ambitious growth plans

Package

• Up to £60,000 salary (potential flex to £65k)
• Bonus scheme
• Remote first working (2 days/month in Macclesfield)
• Private medical insurance
• Gym membership
• Life insurance
• Team socials and events
• Clear progression opportunities

Interview process

• Initial interview with Marketing leadership
• Practical experimentation framework task and presentation
• Final interview with senior stakeholders

If you're a CRO professional who still enjoys getting hands-on with experimentation code, while also wanting the opportunity to build a function and influence strategy, this is an outstanding opportunity.