Front-end Developer (Experimentation /Optimisation)

Job Posting Update: October 2023


At Creative CX, continually improving the customer experience through research, innovation, and experimentation is critical for our clients to remain relevant and competitive. We strive to make a real difference to our clients’ businesses and their customers’ lives through the work that we do.

We seek a seasoned client-side experimentation developer, who will be adept in the nuances of experimentation principles and platforms. You will leverage expertise in A/B testing platforms, including but not limited to Optimizely, Adobe Target, Monetate, A/B Tasty & Dynamic Yield.

Collaborating within a dynamic team, including a project manager and a strategy consultant, you will navigate through developing client-side experiments, playing a crucial role in conceptualising and implementing strategic customer experience initiatives.

Key Responsibilities

  • Develop A/B Tests: Ensure that tests are developed precisely to specification, with a keen eye on feasibility and potential impact.
  • Code Reviews: Engage in peer code reviews, ensuring adherence to best practices and optimising for performance and reliability.
  • Data Review and Debug: Diligently review and debug tracking solutions, ensuring data accuracy and integrity.
  • Feasibility Assessments: Evaluate the feasibility of proposed tests, providing insights into technical and strategic implications.
  • Performance Assessment: Monitor and analyse the performance of live A/B tests, ensuring accurate data collection.


  • Balanced Perspective: Skillfully navigates between client needs and commercial objectives, ensuring mutually beneficial outcomes.
  • Detail-oriented: Demonstrate a meticulous eye for detail, ensuring precision and accuracy in all aspects of work.
  • Proactive Approach: Anticipate needs, challenges, and obstacles, providing solutions and mitigating risks on time.
  • Positive Attitude: Embrace challenges and changes with a constructive and optimistic approach.
  • Problem Solving: Apply robust problem-solving skills, learning rapidly, and adapting solutions to complex challenges.
  • Project Management: Successfully manage multiple projects, ensuring timely delivery and quality outcomes.

Core requirements

  • A/B Testing Expertise: 3-4 years of experience with one or more A/B Testing solutions like Optimizely, Adobe Target, Monetate, VWO, A/B Tasty, Dynamic Yield, etc.
  • Javascript Proficiency: Advanced expertise in native Javascript (ES5 ES6).
  • SPA Frameworks: Proficient in one or more single-page application frameworks, such as React JS, Angular JS, or Vue JS.
  • HTML/CSS: In-depth knowledge of HTML/CSS, including preprocessors like LESS and SASS.
  • Cross-Browser/Device: Experience ensuring design and functionality consistency across various browsers and devices.
  • Data and Analytics: Solid understanding of data analytics, mainly using tools like GA4 and Adobe Analytics, and the technical facets of data management.

Nice to have

  • Tagging Tools: Experience with tagging tools like Google Tag Manager, Adobe Launch, Tealium, Segment, etc.
  • Analytics Solutions: Hands-on experience with analytics solutions like Adobe Analytics or Google Analytics.


Creative CX is filled with great people with bundles of talent and ideas. Come and join our fantastic team, and you’ll be part of an exciting growing consultancy. Some of our benefits include:

  • 25 days’ holiday each year
  • An extra day for every year at Creative CX up to a maximum of 5 extra days.
  • Regular coaching, a continuously updated personal development plan and a generous training budget help you reach your full potential
  • Company contributory pension scheme
  • Perkbox membership gives you cheaper gym memberships and a wide range of discounts
  • Full-supported remote working with the flexibility to work in our Central London Office
  • Private Medical Cover
  • Cycle to Work Scheme
  • Charity Payroll – giving before tax

Get in touch to discuss this role further