CRO & Experimentation Lead for High-Traffic Platforms

Harnham; Manchester; Hybrid; GBP 50,000 - 75,000; Full time

Benefits offered by this job

Hybrid working model

Shape growing experimentation function

Exposure to high traffic products

Career progression opportunities

Data-driven environment

Job summary

Harnham is seeking a CRO Developer to build, implement, and analyse experiments across high-traffic digital platforms from Manchester. You will collaborate with analysts, marketers, and designers to translate hypotheses into live tests that drive measurable business impact.

The role focuses on developing robust experiment code, owning CRO roadmaps, and applying personalisation with leading tools. Hybrid working and career progression are provided.

Qualifications

• Strong commercial experience as a CRO Developer, Front End Developer, or Experimentation Developer.
• Experience with CRO and experimentation platforms such as Optimizely, VWO, AB Tasty, Convert, Dynamic Yield, or similar.
• Strong understanding of A/B testing methodologies and experimentation principles.
• Experience working with web analytics and performance measurement tools.
• Ability to write clean, efficient, and maintainable front-end code.
• Understanding of customer journeys, user behaviour, and conversion optimisation.
• Comfortable working closely with technical and non-technical stakeholders.

Responsibilities

• Develop high-quality experiment code across websites and digital platforms.
• Own the CRO road mapping.
• Work with CRO and product stakeholders to turn testing ideas into live experiments.
• Implement personalisation and experimentation campaigns using leading CRO tools.
• Ensure experiments are technically robust, performant, and accurately tracked.
• Debug, troubleshoot, and optimise testing implementations.
• Collaborate with analytics teams to support experiment measurement and reporting.
• Contribute to experimentation best practices, processes, and governance.
• Identify technical opportunities to improve customer journeys and conversion performance.

Skills

CRO Developer

Front End Developer

Experimentation Developer

Tools

Optimizely

VWO

AB Tasty

Convert

Dynamic Yield

Job description

Harnham is seeking a CRO Developer to build, implement, and analyse experiments across high-traffic digital platforms from Manchester. You will collaborate with analysts, marketers, and designers to translate hypotheses into live tests that drive measurable business impact.

The role focuses on developing robust experiment code, owning CRO roadmaps, and applying personalisation with leading tools. Hybrid working and career progression are provided.