Senior Fullstack Software Engineer (Guadalajara)

**The Company**: Wizeline is a general digital services company helping mid-size to Fortune 500 companies build, scale, and deliver high-quality digital products and services. We thrive in solving our customer's challenges through human-centered experiences, digital core modernization, and intelligence everywhere (AI/ML and data). We help them succeed in building digital capabilities that bring technology to the core of their business. **Are You a Fit? **: To be successful in this role, you will have to:
- Identify and implement web performance optimization strategies, including lazy loading, code splitting, asset minification, and browser caching.
- Monitor and improve Core Web Vitals, ensuring high Lighthouse scores and exceptional user experiences across devices.
- Work closely with cross-functional teams to create dynamic and responsive frontends that deliver optimal speed and interactivity.
- Conduct A/B tests to evaluate the performance impact of new features and refine them based on insights.
- Be a key contributor to scalable front-end architectures that serve millions of users. And you will need:
- Strong communication skills with a problem-solving mindset and a keen interest in performance metrics.
- Proven experience in web performance optimization, including debugging slow pages and reducing load times.
- Expert knowledge of Core Web Vitals, Lighthouse, and modern browser performance profiling tools.
- 5+ years of experience in software development with a focus on frontend and backend optimization using modern frameworks (e.g., React, Node.js).
- Strong knowledge of JavaScript/TypeScript, CSS/SASS, HTML, and their impact on page performance.
- Deep understanding of server-side rendering, code splitting, and isomorphic JavaScript for optimized user experiences.
- Familiarity with A/B testing tools and methodologies to measure and improve performance changes.
- Understanding of Agile/Kanban development processes and collaboration within cross-functional teams.
- Bachelor's degree in Computer Science/Engineering or equivalent professional experience.
- Hands-on experience with image optimization techniques, CDN configurations, and third-party script management (is a plus)
- Knowledge of GraphQL federation and advanced caching strategies.
- Prior contributions to performance-focused open-source libraries or projects. **About Us**: Wizeline prioritizes a culture of diversity and development for its nearly 2,000 person team spread across the globe. We believe great technology comes from a mix of talents and perspectives. Our core values of ownership, innovation, community, and inclusivity are central to our work. Wizeline is invested in its employees' growth, offering opportunities to create personalized career paths and develop in-demand skills. We even have a free education program, Wizeline Academy, to help both employees and the broader community upskill in tech. Postúlate en Kit Empleo: kitempleo.com.mx/empleo/5var67