Software Development Engineer III | Courses custom | Full stack - Frontend at HighLevel

About HighLevel HighLevel is a cloud-based, all-in-one white-label marketing and sales platform that empowers marketing agencies, entrepreneurs, and businesses to elevate their digital presence and drive growth. We are proud to support a global and growing community of over 2 million businesses, from marketing agencies to entrepreneurs to small businesses and beyond. Our platform empowers users across industries to streamline operations, drive growth, and crush their goals. HighLevel processes over 15 billion API hits and handles more than 2.5 billion message events every day. Our platform manages 470 terabytes of data distributed across five databases, operates with a network of over 250 micro-services, and supports over 1 million domain names. Our People With over 1,500 team members across 15+ countries, we operate in a global, remote-first environment. We are building more than software; we are building a global community rooted in creativity, collaboration, and impact. We take pride in cultivating a culture where innovation thrives, ideas are celebrated, and people come first, no matter where they call home. Our Impact Every month, our platform powers over 1.5 billion messages, helps generate over 200 million leads, and facilitates over 20 million conversations for the more than 2 million businesses we serve. Behind those numbers are real people growing their companies, connecting with customers, and making their mark - and we get to help make that happen. Learn more about us on our YouTube Channel or Blog Posts About the Role We’re looking for a Senior Software Engineer to join our Course Customizations Team, which enables over 200,000+ businesses and creators to deliver personalized, branded learning experiences to more than 1 million monthly active users. This team powers customization across courses, lessons, checkouts, and upsells, offering multiple themes and templates that help creators tailor every stage of the learner journey to their brand and audience. As a Senior Engineer, you’ll design and scale the systems that make customization both powerful and safe - covering dynamic theming, layout configuration, template management, and secure data handling for creator-defined content and transactions. You’ll work on challenges such as template versioning, real-time previews, and performance optimization, ensuring every customized experience is consistent and fast. Collaborating with product, design, and infrastructure teams, you’ll shape the foundation that allows every creator to craft a unique, high-impact learning experience at scale. Responsibilities • Develop and maintain reusable UI components, aligning with Highlevel’s design system to ensure consistency across web and mobile applications. • Enhance load times, ensure smooth interactions, and improve rendering efficiency by minimizing bottlenecks, leveraging techniques like lazy loading, code splitting, and caching strategies to support 1M+ users. • Guide frontend engineers by sharing best practices in performance tuning, UI development, and modern frameworks (e.g., React, Vue.js), fostering a culture of technical excellence. • Identify and resolve UI/UX bottlenecks, accessibility gaps, security vulnerabilities, and frontend technical debt to deliver a polished user experience. • Contribute to the design and development of backend APIs to support frontend functionality, ensuring efficient data flow and integration with application features. • Gain deep insights into the product, customer needs, and competitors to enhance user experience and align features with creator and learner expectations. • Partner with designers, product managers, and backend engineers to deliver high-quality, cohesive user experiences across web and mobile platforms. • Keep up with the latest frontend technologies (e.g., WebAssembly, modern JavaScript frameworks) and advocate for tech stack improvements to enhance performance and developer productivity. • Utilize AI-driven tools and frameworks to enhance frontend experiences, such as personalizing user interfaces, optimizing content delivery, or automating UI testing and performance analysis. Requirements • 5+ years of Full-Stack Development Experience with a strong focus on Frontend. • Proficiency in modern JavaScript frameworks (Vue.js, React, or Angular) and Node.js for building scalable, high-performance applications. • Strong knowledge of HTML, CSS, TypeScript, and modern frontend build tools (Webpack, Vite, etc.). • Deep understanding of browser rendering, performance profiling, lazy loading, caching strategies, and optimization techniques. • Experience optimizing high-traffic, large-scale applications for performance and scalability. • Experience with monitoring and debugging tools (e.g., Lighthouse, Sentry, Web Vitals).Understanding of databases (e.g., MySQL, MongoDB) and caching strategies (e.g., Redis).Comfortable working with RESTful APIs, GraphQL, backend integrations and Cloud Platforms. • Strong problem-solving skills, ownership mindset, and ability to work in a cross-functional team. • Nice to Have: Experience with AI tools and contributions to open-source projects, internal platforms, or engineering blogs. EEO Statement The company is an Equal Opportunity Employer. As an employer subject to affirmative action regulations, we invite you to voluntarily provide the following demographic information. This information is used solely for compliance with government record keeping, reporting, and other legal requirements. Providing this information is voluntary and refusal to do so will not affect your application status. This data will be kept separate from your application and will not be used in the hiring decision.