Winona is hiring a Frontend Engineer III - Web CRO to be a key contributor in developing complex, user-facing web applications. You will leverage your specialized skills to drive our Conversion Rate Optimization (CRO) initiatives by building robust, high-performing frontend components.
What You'll Do
- Design, develop, and maintain complex user-facing web applications using modern frontend technologies.
- Lead the development of frontend components for CRO experiments, ensuring precise implementation of tracking and analytics.
- Utilize CRO tools such as Optimizely to build and deploy A/B tests and other experimental components within complex frontend systems.
- Create and maintain advanced reusable frontend components and libraries to promote efficiency and consistency.
- Ensure the high performance, responsiveness, and scalability of web applications across various devices and browsers.
- Champion responsive design principles and implement best practices in CSS architecture.
- Research, evaluate, and introduce new frontend technologies, tools, and best practices to enhance development and product capabilities.
- Mentor junior engineers and promote best practices across engineering teams.
- Collaborate effectively with cross-functional teams to deliver integrated and high-quality solutions.
- Contribute to code reviews, ensuring code quality, maintainability, and adherence to established standards.
What We're Looking For
- 5+ years of professional experience in developing and maintaining complex, user-facing web applications.
- Expert-level proficiency in HTML5, CSS3, and JavaScript (ES6+).
- Strong proficiency in Vue.js (versions 2 and 3) and Nuxt 3.
- Excellent understanding of developing reusable frontend components in large software systems.
- Proven experience in developing front-end components for Conversion Rate Optimization (CRO) experiments, with a strong emphasis on implementing accurate tracking and analytics.
- Demonstrated experience using CRO tools like Optimizely in combination with complex frontend systems to create testable frontend components.
- Advanced understanding of responsive design principles and extensive experience with CSS preprocessors/frameworks.
- Proficiency in Git for version control.
- Experience with frontend build tools and package managers (e.g., Vite, Webpack, npm, Yarn).
- Familiarity with RESTful and GraphQL APIs and integrating frontend interfaces with backend services.
- Solid understanding of UX/UI principles and best practices.
- Knowledge of performance testing and debugging practices.
- Strong communication and collaboration skills to work effectively with cross-functional teams.
Technical Stack
- HTML5, CSS3, JavaScript (ES6+)
- Vue.js, Nuxt 3
- Optimizely
- Git
- Vite, Webpack, npm, Yarn
- RESTful APIs, GraphQL APIs
Benefits & Compensation
- Flexible hours, work wherever you choose
- Unlimited Paid Time off
- Paid non-working holidays per country of residence
- Pro-rated 13th-month bonus in select regions
- Referral bonuses
- Financial support for online courses
- Fun and casual work environment
- Employee engagement activities and virtual gatherings
Work Mode
This is a global position. Our team works remotely.
Winona provides equal employment opportunities to all qualified individuals without regard to race, color, religion, sex, gender identity, sexual orientation, pregnancy, age, national origin, physical or mental disability, military or veteran status, genetic information, or any other protected classification.


