[Hiring] Software Development Engineer III @HighLevel

Role Description

We’re looking for a Software Development Engineer III with deep expertise in Node.js , Go , Java , MongoDB , and distributed systems, along with a strong focus on platform stability, scalability, and long-term technical excellence. You’ll join the platform team within our LC Phone System, which provides capability for purchasing phone numbers, Messaging, Calling, Compliance and Platform.

This role is backend-heavy, involving platform-level challenges such as:

• System stability
• Performance optimization
• Tech debt reduction
• Security hardening
• 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

• Stabilize & Scale the Platform: Tackle systemic bottlenecks, improve fault tolerance, and ensure high availability for mission-critical phone services.
• Efficiency & Performance: Optimize resource usage (CPU, memory, network) to handle millions of operations while reducing cloud costs.
• Tech Debt & Modernization: Lead long-term refactoring efforts, deprecate legacy systems, and introduce scalable patterns.
• Security & Compliance: Strengthen data protection, access controls, and auditability across the platform.
• Developer Velocity: Improve tooling, observability, and automation to accelerate engineering workflows.
• Cross-Team Collaboration: Work with product, infrastructure, and other engineering teams to align on platform priorities.
• Mentorship & Leadership: Guide engineers, set architectural standards, and drive the platform roadmap.

Qualifications

• 4+ 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).
• 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 quality practices, automated testing, CI/CD pipelines, and dev tooling optimization.
• Excellent problem-solving skills, with clear and collaborative communication across teams.

Preferred Experience

• Experience with AI Tools and contributions to open-source tools, internal platforms or engineering blogs.
• Experience with modern front-end frameworks (e.g., React, Vue, Angular) and building full-stack web applications.