Senior DevOps Engineer

Harmonic Security lets teams adopt AI tools safely by protecting sensitive data in real time with minimal effort. It gives enterprises full control and stops leaks so that their teams can innovate confidently.

We are led by cybersecurity experts and backed by top investors including N47, Ten Eleven Ventures, and In-Q-Tel.

As Harmonic’s product and customer footprint grow, the reliability, security, and developer experience of our underlying platform become mission-critical. This role exists to build and operate the infrastructure that makes safe, real-time AI adoption possible at scale. As a Senior DevOps Engineer, you’ll design the automation, deployment pipelines, and cloud architecture that power our product every day — creating a resilient, low-friction platform that engineers trust and customers depend on. This is a hands-on opportunity to shape the technical foundations of a category-defining security company from the inside out.

How We Work: AI-First by Design

Harmonic exists to help enterprises adopt AI safely and at scale. We hold ourselves to the same standard. Everyone at Harmonic actively uses AI tools to do their best work, from research and writing to building processes and automating workflows. We expect every new hire to bring curiosity about AI and a willingness to use it to work smarter, faster, and more creatively. For some roles, that means tinkering and staying open to new tools. For others, it means building entirely new systems with AI at the core. We'll be clear about what we expect for each role, and we'll give you the tools and support to get there.

Our Product Delivery team is the engine that turns vision into impact. We ship early and often, getting valuable features into the hands of customers quickly and iterating from there. We work in the open by default, sharing progress and ideas, and we trust each other to own outcomes. We’re a small but mighty crew where every person plays a critical role and we’re committed to using AI to work smarter and faster.

The Senior DevOps Engineer is responsible for designing, building and maintaining the highly scalable infrastructure that powers our applications. This role is a blend of automation, infrastructure design and CI/CD pipeline development.

• Your primary focus is the automation and standardisation of our cloud infrastructure and deployment processes.

• Develop reusable modules to enforce consistency and best practices across all environments

• Design and implement highly available and fault-tolerant architectures on AWS utilising multiple AZs and regions

• Build, maintain, and optimise CI/CD pipelines using GitLab CI/CD. Manage and configure GitLab Runners (specifically on Docker or AWS EC2/ECS) for scalable and efficient job execution, ensuring fast feedback loops for developers

• You evangelise and implement DevOps best practices, including shift-left security, monitoring, alerting and logging

• The platform provides an outstanding experience with minimal friction for both the development and operations teams, allowing everyone to do their best work

• Highly available, well maintained platform backed by repeatable processes that allow us to meet and exceed the highest standards for security and resilience

• Experience with infrastructure as code tooling (preferably Terraform/OpenTofu)

• Experience with cloud services (preferably AWS)

• Understanding of networking and web applications

• Knowledge of Docker and container orchestration platforms

• Knowledge of Linux/Unix based operating systems

• Experience of CI/CD tooling (GitLab, GitHub, etc.)

• Experience of troubleshooting issues with infrastructure and web applications

• Proficient in one or more scripting languages (Bash, Python etc.)

• Experience with monitoring and log management tooling (Prometheus, Grafana, ELK, CloudWatch etc.)

• Experience working within a fast moving software development organisation

• Have a solid understanding of development processes; you likely started as a developer before moving into DevOps and identify as "more Dev than Ops."

• Love the idea of building and maintaining resilient, modern infrastructure designed to handle massive, high-concurrency workloads.

• Thrive in fast-paced startup environments where ambiguity is common and you have the agency to solve it.

• See AI as a fundamental tool to help you architect, deploy, and monitor systems smarter, faster, and better.

• Actively use AI tools (Claude Code, Cursor, or similar) to accelerate your work, from writing IaC and debugging pipelines to researching and prototyping new architecture.

• Stay current on how AI is changing the DevOps and SRE domains, with strong opinions on where it adds value and where it introduces risk.

• Refuse to default to the infrastructure playbook you've been running for the last decade—instead, you look for ways to automate the mundane and rethink legacy workflows.

• Choose to spend your energy on the complex engineering problems that actually require your expertise, rather than manual, repetitive tasks.

This isn’t just a job; it’s an opportunity to be part of a team that is redefining cybersecurity. We believe today’s talent is tomorrow’s success, and we’re committed to creating an environment where you can do the best work of your life.

• Competitive pay and meaningful equity with a direct stake in Harmonic’s success

• Comprehensive benefits, pension plan, generous PTO, and flexible hybrid work

• A small, passionate team that values transparency, creativity, and learning

• Thoughtful leadership that cares deeply about growth, impact, and people

• Annual global offsites (past trips include Lisbon and Nashville)

• The chance to directly shape both our product and our culture as we build a category-defining company

We embrace new, unfamiliar situations that require initiative and rapid decision-making. We orient ourselves quickly and deliver results with minimal guidance.

We raise our hands, take on challenges, and assist others whenever possible. We hunger for opportunities to learn and do more.

We support one another to create cohesion and unity. We collaborate openly, share feedback honestly, and help everyone produce their best work.