Lead Engineer - LC Phone Platform

About Us 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 looking for a Lead Software Engineer with deep expertise in Node.js, MongoDB, and distributed systems, along with a strong focus on platform stability, scalability, and long-term technical excellence. You’ll join our Platform Team within the LC Phone System, which serves as the backbone for HighLevel’s communication infrastructure, ensuring reliability, security, and efficiency at scale. This role is backend-heavy, involving platform-level challenges such as system stability, performance optimization, tech debt reduction, security hardening, and cost efficiency. You’ll work on foundational improvements that enable the entire Phone System (including Calling, Messaging, and related services) to operate seamlessly under increasing demand. Responsibilities 1. Stabilize & Scale the Platform: Tackle systemic bottlenecks, improve fault tolerance, and ensure high availability for mission-critical phone services. 2.Efficiency & Performance: Optimize resource usage (CPU, memory, network) to handle millions of operations while reducing cloud costs. 3. Tech Debt & Modernization: Lead long-term refactoring efforts, deprecate legacy systems, and introduce scalable patterns. 4. Security & Compliance: Strengthen data protection, access controls, and auditability across the platform.Developer 5.Velocity: Improve tooling, observability, and automation to accelerate engineering workflows. 6.Cross-Team Collaboration: Work with product, infrastructure, and other engineering teams to align on platform priorities. 7.Mentorship & Leadership: Guide engineers, set architectural standards, and drive the platform roadmap. Requirements - 6+ years of backend engineering experience, including designing fault-tolerant systems and working on high-scale platforms. - Deep expertise in distributed systems, event-driven architectures, and asynchronous job processing - Strong experience with relational and NoSQL data models (especially with complex temporal data) - Experience with modern front-end frameworks (e.g., React, Vue, Angular) and building full-stack web applications. - Proven track record of architecting complex systems and delivering scalable, high-performance web apps in production. - Strong understanding of software design patterns, API design, and microservices architecture in a multi-tenant environment. - Skilled in guiding technical architecture, making high-impact engineering decisions, and mentoring fellow engineers.Experience with code quali ... (truncated, view full listing at source)