Software Development Engineer III

About HighLevel:

HighLevel is an AI powered, all-in-one white-label sales & marketing platform that empowers 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, comprised of agencies, consultants, and businesses of all sizes and industries. HighLevel empowers users with all the tools needed to capture, nurture, and close new leads into repeat customers. As of mid 2025, HighLevel processes over 4 billion API hits and handles more than 2.5 billion message events every day. Our platform manages over 470 terabytes of data distributed across five databases, operates with a network of over 250 microservices, and supports over 1 million hostnames.

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

As of mid 2025, 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 each month. Behind those numbers are real people growing their companies, connecting with customers, and making their mark - and we get to help make that happen.

About the Role:

We're seeking an experienced Frontend Heavy Full Stack SDE3 who excels at building intuitive, performant user interfaces while maintaining strong full-stack capabilities. You'll architect and build the UI layer for our AI features, create seamless integrations with LLM services, and ensure our AI capabilities are accessible through beautiful, user-friendly interfaces.

• Design and develop sophisticated interfaces for conversational AI, content generation, and intelligent automation features
• Build robust integrations between frontend applications and AI/LLM services
• Create frontend architecture that handles real-time AI responses, streaming data, and complex state management
• Design and implement REST APIs that bridge AI capabilities with frontend experiences
• Ensure AI features remain fast and responsive even under heavy load

• 4+ years full-stack development experience with frontend focus (70% frontend/30% backend)
• Expert-level proficiency in JavaScript/TypeScript, (or React), HTML5, CSS3
• Strong experience with modern frontend architecture: state management, component design patterns, performance optimization
• Solid backend experience for API development
• Experience with GraphQL and building scalable APIs
• Deep understanding of responsive design, accessibility, and cross-browser compatibility
• Proven ability to work with complex UI state and real-time data flows
• Track record of building highly scalable, user-facing applications

• Experience with LLM integrations (OpenAI, Anthropic, etc.) or AI-powered features
• Knowledge of streaming responses and handling async AI workflows in UI
• Familiarity with WebSockets or real-time communication protocols
• Experience with design systems and component libraries
• Background in data visualization or building analytics dashboards
• Understanding of prompt engineering and AI interaction patterns

EEO Statement:

At HighLevel, we value diversity. In fact, we understand it makes our organisation stronger. We are committed to inclusive hiring/promotion practices that evaluate skill sets, abilities, and qualifications without regard to any characteristic unrelated to performing the job at the highest level. Our objective is to foster an environment where really talented employees from all walks of life can be their true and whole selves, cherished and welcomed for their differences while providing excellent service to our clients and learning from one another along the way Reasonable accommodations may be made to enable individuals with disabilities to perform essential functions.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.