Software Development Engineer III - Infrastructure

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 are seeking SDE3 engineers to join HighLevel’s Core Infrastructure SRE Operations & Security team. This role focuses on operating, securing, and improving HighLevel’s production infrastructure, with responsibilities spanning on-call operations, incident response, reliability engineering, and security remediation. You will work closely with Cloud Infrastructure, Platform Engineering, Data Infrastructure, and Security teams to ensure systems are stable, resilient, and secure. This is a hands-on role with a strong operational and security mindset, critical to HighLevel’s platform maturity. Responsibilities: Production Operations & Reliability: -> Participate in 24/7 on-call rotations for core infrastructure systems -> Execute incident response during production events, including triage, mitigation, and recovery -> Maintain and improve runbooks, operational procedures, and escalation paths -> Help reduce MTTR and prevent repeat incidents through engineering solutions Infrastructure Reliability Engineering: ->Improve reliability of core infrastructure components including: Kubernetes (GKE) clusters, Cloud networking and load balancing & Edge services (Cloudflare) -> Identify systemic reliability issues and drive corrective actions -> Support capacity planning, scaling, and resilience testing Security Operations & Remediation: -> Execute security remediations across cloud and Kubernetes environments -> Support enforcement of: IAM least-privilege access, Network security controls & Runtime security policies -> Partner with Platform Security on vulnerability management and remediation -> Support security incident response and post-incident reviews Automation & Tooling: -> Automate repetitive operational and security tasks -> Build tooling to improve:Incident response speed, Operational visibility & Security posture enforcement -> Reduce manual toil through scripts, tooling, and process improvements Change Management & Governance: -> Support safe execution of infrastructure and configuration changes -> Ensure changes follow defined change management and audit requirements -> Contribute to incident reviews, postmortems, and continuous improvement initiatives Collaboration & Growth: -> Work closely with Cloud Infrastructure, SRE, Platform, Data, and Security teams -> Contribute to shared documentation and operational standards -> Mentor junior engineers and lead small reliability or security initiatives Requirements:

4+ years of experience operating large-scale systems

Experience leading incident response or reliability initiatives

Ability to identify systemic issues and propose long-term fixes

Comfortable mentoring junior engineers and influencing peers

Experience supporting or operating production systems

Strong understanding of reliability, security, and operational best practices

Comfortable working in on-call and incident response environments

Strong troubleshooting and communication skills

Nice to have:

Experience with GCP or other public cloud platforms

Experience with Kubernetes (GKE) in production

Familiarity with Cloudflare, networking, or edge security

Exposure to security tooling or vulnerability management

Scripting or automation experience (Python, Go, Bash, etc.)

Experience in compliance- or audit-driven environments (SOC2, ISO)