Lead CRO Engineer - Hybrid, Profit Share, Growth

Jet2.com and Jet2holidays; Leeds; Hybrid; GBP 70,000 - 100,000; Full time

Benefits offered by this job

Hybrid working (office ~2 days a month

Profit share scheme

Colleague discounts on Jet2 flights &H

Job summary

Jet2.com and Jet2holidays seeks an experienced Lead CRO Developer to drive experimentation and optimisation across our digital platforms. You will lead technical delivery of A/B tests, build personalised experiences, and partner with UX, Analytics and Marketing to translate ideas into measurable experiments.

You’ll mentor developers, set technical governance, and ensure performance and accessibility while advancing our CRO capabilities with platforms like Optimizely and Adobe Target.

Qualifications

• Extensive experience developing A/B tests and optimisation campaigns.
• Strong knowledge of JavaScript, HTML and CSS.
• Experience with experimentation platforms (Optimizely, Adobe Target, VWO, AB Tasty).
• Proven leadership, mentoring and engineering best practice.
• Strong focus on website performance, accessibility and cross‑browser compatibility.

Responsibilities

• Lead the technical delivery of A/B and multivariate tests across digital platforms.
• Develop customer experiences using JavaScript, HTML and CSS to create experiments and personalisation campaigns.
• Collaborate with UX, Analytics and Marketing to translate ideas into measurable experiments.
• Champion experimentation methodologies and coding standards; ensure reliable test implementations.
• Ensure tests optimise performance without compromising Core Web Vitals or accessibility.
• Mentor developers, conduct code reviews and help evolve development standards.
• Configure and develop within Experimentation platforms (client-side and server-side).
• Stay up to date with CRO techniques and front-end technologies to improve capabilities.

Skills

JavaScript

HTML

CSS

A/B testing

Mentoring

Cross-functional collaboration

Web performance

Tools

Optimizely

Adobe Target

VWO

AB Tasty

Job description

Jet2.com and Jet2holidays seeks an experienced Lead CRO Developer to drive experimentation and optimisation across our digital platforms. You will lead technical delivery of A/B tests, build personalised experiences, and partner with UX, Analytics and Marketing to translate ideas into measurable experiments.

You’ll mentor developers, set technical governance, and ensure performance and accessibility while advancing our CRO capabilities with platforms like Optimizely and Adobe Target.