Software Development Engineer III (Backend) - Contacts

About the role

About HighLevel: HighLevel is an AI-powered business operating system that gives agencies, entrepreneurs and SMBs the infrastructure to build, automate and scale. Today, HighLevel supports SMBs across 150+ countries, fueling community-driven growth rooted in real customer outcomes. To date, businesses operating on HighLevel have generated over $7 billion in ecosystem value, demonstrating the impact of shared infrastructure at scale. By centralizing conversations, automation and intelligence into one system, we help businesses move faster, reduce complexity and execute efficiently. Behind the platform, HighLevel powers more than 4 billion API hits and 2.5 billion message events daily. With 250 terabytes of distributed data, 250+ microservices and over 1 million domain names supported, our architecture is built for performance, resilience and long-term scalability.

Our people With over 2,000 team members across 10+ countries, HighLevel operates as a global, remote-first organization built for speed and ownership. We value initiative, clarity and execution, creating space for ambitious people to build systems that support millions of businesses worldwide. Here, innovation thrives, ideas are celebrated and people come first, no matter where they call home.

Our impact Every month, HighLevel enables more than 1.5 billion messages, 200 million leads and 20 million conversations for the more than 1 million businesses we support. Behind those numbers are real people building independence, expanding opportunity and creating measurable impact. We’re proud to be a part of that. Learn more about us on our YouTube Channel or Blog Posts

About the Role:

The Contacts Team is at the heart of our CRM platform, managing the core infrastructure for contact records, views, filters, segmentation, and more. Every product surface (for example, automation, campaigns, pipelines, or reporting) interacts with Contacts. We're building scalable, reliable, and flexible systems that power millions of interactions daily.

In this role, you will drive technical outcomes as a hands-on Individual Contributor. You will own high-impact initiatives across the Contacts domain.

Responsibilities: Backend Development

● Design, develop, and maintain scalable backend services and APIs.

● Build high-performance, reliable microservices capable of handling large-scale workloads.

● Write clean, efficient, and maintainable production-quality code.

● Develop reusable components and services following engineering best practices.

● Participate in technical design discussions and contribute to system architecture.

System Performance & Reliability

● Optimize backend services for scalability, performance, and availability.

● Troubleshoot production issues and implement sustainable solutions.

● Improve system reliability through monitoring, logging, testing, and observability.

● Participate in incident resolution and root cause analysis when required.