Boston, MA, United States

Senior A/B Testing Developer

Senior A/B Testing Developer

Isobar is a global digital agency that delivers experience-led transformations powered by creativity.  We have redefined the way consumers experience music through emerging technology with the creation of Aeronaut.  We have taken six disparate brands and brought them under one house through the transformation of Zwilling. We have strategized, built and executed the digital reinvention of Enterprise, Alamo + National.  And we have connected families to LAIKA’s Missing Link characters through the power of voice. Isobar has a longstanding history of solving complex business problems. We have deep expertise in UX, creative, technology and optimization and are able to take on the toughest problems because of it.  Sound like something you want to be a part of?

Position Overview

Isobar is looking for Senior A/B Testing Developers who are interested in applying their expertise in front-end technologies to develop and support enterprise-class conversion optimization (CRO) programs through A/B and multivariate testing (MVT) for our clients. The candidate must have experience working in structured environments following defined development methodologies.

This position is an integral part of Isobar’s optimization team. The Senior A/B Testing Developer will be challenged to utilize all available front-end technologies (HTML, JavaScript, CSS) to support development, implementation, and analysis of marketing-driven testing campaigns using tools like Adobe Target, Google Optimize, Optimizely, Optimost, or Maxymiser.

Leveraging a thorough knowledge of DOM manipulation using HTML/CSS, JavaScript, and sometimes JavaScript frameworks, Senior Conversion Optimization Developers at Isobar work in a collaborative environment to create technical solutions that support optimization and testing strategies of client sites.


  • Ensure flawless setup and execution of tests within the testing tools—supporting all technical aspects of the conversion optimization program
  • Work both independently and collaboratively to setup, develop, code review, and QA complex A/B and multivariate tests
  • Mentor and train junior a/b testing developers to expand their skills and knowledge of front-end development, testing tools, and conversion optimization/testing best practices
  • Proactively anticipate issues while developing and proposing solutions
  • Consult with clients and non-technical team members on complex technical issues
  • Ensure accurate setup and development of tests to deliver high quality statistical results
  • Identify areas for improvement across sites and processes, and effectively communicate these findings to clients and/or internal teams
  • Develop processes inside client organizations that enable a successful development workflow within their conversion optimization programs
  • Provide support and troubleshooting to ensure quick resolution when technical issues arise

Required Skills

  • 2-4 years of experience focused on front-end web development with a very strong understanding of DOM manipulation (HTML, CSS, and JavaScript)
  • 1-2 years of experience executing A/B and multivariate tests using industry tools such as Adobe Target, Google Optimize, Optimizely, Optimost, or Maxymiser. (Training for specific tools may be provided)
  • Strong command of essential front-end web technologies, including HTML, CSS, Vanilla JavaScript, some JS Libraries, AJAX, JSON, DOM manipulation, accessibility, best practices and standards.
  • Basic understanding of conversion optimization principles and best practices
  • Working knowledge of tag managers and web analytics implementation ( Google Tag Manager, Adobe Launch/DTM, Adobe Analytics, Google Analytics, etc.)
  • Strong understanding of the browser DOM, browser behavior and compatibility, and cross-browser issues and solutions
  • Ability to manipulate site content and functionality using client-side technologies
  • Strong desire to apply technical development skills to innovative marketing solutions and products that make real impact on client businesses

Nice to Have

  • Exposure to source code management tools like GIT
  • Experience with ReactJS
  • Working knowledge of object literal or modular JavaScript design patterns