CRO Developer

Harnham; Manchester; Híbrido; GBP 34.000 - 46.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Hybrid work schedule

Work on high-traffic platforms

Exposure to international markets

Ownership and autonomy

Clear progression to CRO Manager

Collaborative CRO team

Descripción de la vacante

Harnham is seeking a CRO Developer in Manchester to design, build and deploy A/B tests across multiple digital products. You will work within an established CRO function, driving improvements in conversion performance and gaining hands-on experience with a mature experimentation programme.

You will deploy tests using JavaScript, HTML and CSS, and collaborate with marketing, product and development teams. The role offers hybrid work with 2–3 days in the office and opportunities to progress toward

Formación

• CRO experience with hands-on A/B testing.
• Experience building and deploying tests on high-traffic sites.
• Strong JavaScript, HTML and CSS skills.
• Familiarity with experimentation platforms (Convert.com/Optimizely/VWO).
• Ability to translate data into test plans.
• Understanding statistics in experimentation.
• Experience with lead generation or performance marketing is advantageous.

Responsabilidades

• Build and deploy A/B and multivariate tests using JavaScript, HTML and CSS.
• Implement experiments via Convert.com and Optimizely.
• Develop test variations to improve conversions.
• Analyze results to derive actionable insights.
• Collaborate with marketing, product and development teams.
• Use behavioral data to identify optimization opportunities.
• Manage multiple experiments across digital products.
• Support ongoing CRO programme evolution.
• Improve customer journeys and conversion performance.

Conocimientos

CRO expertise

A/B testing

JavaScript

HTML/CSS

Experimentation methodology

Data analysis

Customer behavior analysis

Test planning

High-traffic websites

Lead generation or performance mktg

Herramientas

Convert.com

Optimizely

VWO

Descripción del empleo

CRO Developer

Manchester (Hybrid, 2-3 days per week in the office) | £40,000

This is an excellent opportunity for a CRO Developer to join a well-established experimentation programme and build hands-on experience across a portfolio of high-traffic digital products. You'll focus on designing, building and deploying A/B tests while working closely with an experienced CRO function, with a clear pathway into a future CRO Manager position.

The Company

They are a leading digital marketing and lead generation business operating across multiple international markets. Through a portfolio of digital products, they acquire and convert high-intent customers across a range of customer journeys and sectors. With a strong focus on data, experimentation and performance marketing, they have built a mature conversion rate optimisation programme supported by extensive historical testing data and proven experimentation frameworks. The business continues to invest heavily in optimisation and digital growth.

The Role

You will play a hands-on role in delivering conversion rate optimisation initiatives across multiple websites and customer journeys.

Responsibilities include:

• Building and deploying A/B and multivariate tests using JavaScript, HTML and CSS
• Implementing experiments through platforms such as Convert.com and Optimizely
• Developing test variations and front-end changes to improve conversion performance
• Analysing experiment results and identifying actionable insights
• Working closely with marketing, product and development teams
• Using behavioural and performance data to identify optimisation opportunities
• Managing multiple experiments across different digital products
• Supporting the evolution of an established experimentation programme
• Contributing to continuous improvements in customer journeys and conversion performance

Your Skills & Experience

• Strong commercial experience within Conversion Rate Optimisation
• Hands-on experience building and implementing A/B tests
• Strong JavaScript, HTML and CSS skills
• Experience using experimentation platforms such as Convert.com, Optimizely, VWO or similar
• Understanding of experimentation methodology and statistical analysis
• Experience analysing customer behaviour and conversion funnels
• Ability to develop data-driven hypotheses and translate them into test plans
• Strong analytical and problem-solving skills
• Experience working on high-traffic websites is beneficial
• Experience within lead generation or performance marketing environments is advantageous

What They Offer

• £40,000 salary
• Hybrid working with 2-3 days per week in the office
• Opportunity to work on high-traffic digital platforms
• Exposure to international markets and multiple customer journeys
• Established experimentation framework and testing history
• Significant ownership and autonomy
• Clear progression path towards a CRO Manager position
• Collaboration with experienced CRO, marketing and product specialists