Lean Tech is a fast-growing company located in Medellín, Colombia. We currently have one of the most prominent networks within the entertainment, financial, and logistics industries. Our corporate projections represent hundreds of opportunities for our professionals to grow and boost their careers. Working with us means collaborating with large engineering teams across Latin America and the United States. We are currently looking for an experienced, dynamic, and highly motivated** **Senior Full-Stack Developer.** This role is crucial to our team, involving leading the development and ongoing optimization of our e-commerce platform using advanced technologies like Shopify for the back end and NextJS for the front end, hosted on Vercel. We are looking for a professional passionate about growth and experimentation in the e-commerce domain. **Your Duties as a Lean Tech Warrior**: - E-commerce Store Development and Optimization: Lead the development and continuous optimization of our headless e-commerce store, ensuring top performance and an exceptional user experience. - Experimentation and Testing: Design, implement, and analyze A/B and multivariate tests, using data and analytics to drive improvements in site functionality and UX. - Implementation of Improvements: Identify opportunities and execute the implementation of new features and functionalities to enhance user conversion rates and engagement. - Performance Monitoring: Continuously monitor site performance, identifying and resolving technical issues or bugs to ensure smooth operations. - Data-Driven Analysis: Utilize analytics tools and user feedback to guide development decisions and prioritize projects. **Why We’ll Love You**: - Full-Stack Development Experience: Proven and extensive experience in full-stack development, with an emphasis on Shopify and NextJS. - Mastery of JavaScript and Related Frameworks: Solid knowledge in modern JavaScript, including frameworks like React and Node.js, and experience in server-side rendering. - Expertise in Growth Hacking: Proven experience in growth hacking, with skills in implementing and analyzing A/B tests and data-driven development. - Advanced Analytical Tools: High proficiency in analytical tools, preferably Posthog, for detailed tracking and analysis of experiments. - Creative Problem Solving: Exceptional ability to solve complex problems and creativity in driving user engagement and conversions. - Specific Technical Competencies: - Proficiency in advanced HTML, CSS, and JavaScript. - Experience with React and Node.js. - Knowledge of RESTful APIs and GraphQL. - Skills in web performance optimization and SEO practices. - Experience in database management and cloud storage. - Education: Preferably a Bachelor’s degree in Computer Science, Software Engineering, or a related field. Equivalent practical experience will be valued We are more than a company; we are warriors working daily to change the world through technology.