SDE III - Whatsapp Voice

About us

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

Our Blog Has a New Home : We’ve consolidated our blog experience into one place so you can find the latest HighLevel updates, strategies, and resources faster .

About the Role

As a Senior Software Engineer, with deep expertise in Java/Golang/Node.js, MongoDB, and distributed systems, along with a strong focus on platform stability, scalability, and long-term technical excellence. You’ll join our LC Phone Voice System, which provides capability for voice calling, IVR, SIP and much more.

You’ll be contributing in shaping the experience of our platform. You’ll solve complex challenges across frontend / backend architecture, performance, micro-frontends, and distributed backend systems. You’ll also work on resolving critical voice service issues, such as the carrier-level call blocking and SIP 603 errors reported by clients like Forever Freight Broker. You’ll contribute to overall growth and stability of the platform, collaborate closely with PMs and ensure exceptional user experiences at scale.

Responsibilities

• Own and contribute to architecture and development across products, driving technical excellence in both frontend and backend systems.

• Develop and optimize backend API services with test-driven development including advanced caching and messaging for reliability and scalability.

• Deliver high-quality frontend experiences using modern frameworks, with strong fundamentals in component-based architectures and state management.

• Integrate and support observability, logging, and monitoring to ensure platform reliability and rapid incident response.

• Ensure top-tier application security and compliance, applying best practices across frontend, backend, and API layers (authentication, authorization, rate-limiting, OWASP).

• Leverage LLMs and AI tools to write, refactor, test, and debug code efficiently, implementing guardrails for reliability.

• Participate in design reviews, deep dives, and on-call rotations to support a culture of accountability and operational excellence.