CRO Engineer

About Chartis Interactive

We are a Design, Marketing and Technology Consultancy that promotes positive working relationships through collaboration and encourages high standards of conduct and work performance. Our values help define our culture through a variety of team perspectives, backgrounds and the ongoing support of innovation across all the solutions we provide to our Clients. We also provide a full career development program aimed at improving the skill sets and capabilities of all our employees.

What We Offer

• We offer competitive benefits plans
• Retirement savings plans (401K) and vacation programs
• An environment that encourages networking and collaboration across clients and other functions of the businesses
• Active engagement with expert internal team members to improve skill sets and career development

About the role

Chartis is seeking a CRO Engineer who is 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 Chartis’ optimization team. The CRO Engineer 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, Optimizely, VWO and others.

Leveraging a thorough knowledge of DOM manipulation using HTML/CSS, JavaScript, and JavaScript frameworks, CRO Engineers at Chartis work in a collaborative environment to create technical solutions that support optimization and testing strategies of client sites.

Duties and Responsibilities

• Ensure accurate and reliable 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
• Document test hypotheses, variations, and technical implementation details for knowledge sharing
• Monitor test performance and page load impact to ensure optimal user experience
• Collaborate with UX/design teams to translate wireframes and mockups from Figma into functional test variations
• Participate in test prioritization discussions based on technical feasibility and effort estimation
• 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
• Provide support and troubleshooting to ensure quick resolution when technical issues arise

Qualifications

• 3-5 years of experience focused on front-end web development with a very strong understanding of DOM manipulation (HTML, CSS, and JavaScript)
• 3-5 years of experience executing A/B and multivariate tests using industry tools such as Adobe Target, Optimizely, VWO and others (Training for specific tools may be provided)
• Strong command of essential front-end web technologies, including HTML, CSS, Vanilla JavaScript, JavaScript Libraries, AJAX, JSON, DOM manipulation, accessibility, best practices and standards
• Strong understanding of responsive design and mobile-first development approaches
• Basic understanding of conversion optimization principles and best practices, including statistical significance, sample sizes, and test duration calculations
• Working knowledge of tag managers and web analytics implementation (Google Tag Manager, Adobe Launch, Adobe Analytics, Google Analytics, etc.)
• Strong understanding of the browser DOM, browser behavior and compatibility, and cross-browser issues and solutions
• Understanding of how test code impacts page speed and Core Web Vitals
• 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
• Experience with modern JavaScript frameworks (ReactJS, Vue, Angular, or similar)

Nice to Have

• Exposure to source code management tools like GIT
• Working knowledge of object literal or modular JavaScript design patterns
• Experience with build tools and local development environments
• Familiarity with testing in headless/server-side environments
• Understanding of personalization strategies and targeting rules
• Basic knowledge of statistical concepts (confidence intervals, p-values, Type I/II errors)
• Experience with visual QA tools or automated testing