Technical CRO Lead: Front-End Experimentation & Growth

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

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.