Cloud System Engineer - Infrastructure & Security

Passionate about Climate, Energy and AI? Join Kayrros, as a Cloud System Engineer - Infrastructure & Security F/H 

About Kayrros

Kayrros is a global leader in energy and environmental intelligence, using AI and geoanalytics to turn satellite and other data into actionable insights. Our technologies help businesses and governments improve efficiency, boost climate resilience, and make smarter decisions in a world of rising climate risks.

Kayrros’s impact has earned wide recognition: TIME’s 100 Most Influential Companies, Fortune’s ‘Change the World’ list (2023 & 2024), Top Five Company of the Year in Fast Company’s World Changing Ideas 2024, Financial Times Tech Champion, and our Wildfire Monitor named one of TIME’s Best Inventions of 2025.

The Mission

At Kayrros, we are building the definitive platform for environmental intelligence. To support our rapid growth and the massive scale of data we process, we are strengthening our Infrastructure Team.

We are looking for a Cloud System Engineer (2-4 years exp.) who is not just an operator, but a builder. You will join a small, agile squad (<5 people) where your work has immediate visibility and impact.

You will work hand-in-hand with Data Scientists, Data Engineers, and Researchers to build, secure, and scale the AWS architecture that powers our products. If you are passionate about the intersection of System Administration, Cloud Architecture, and Platform Engineering, this role is for you.

Our Tech Stack (seen from space) 🌍

• Cloud: AWS (Expert level preferred)

• IaC: Terraform (We write complex modules)

• Container orchestration: Kubernetes & Docker

• Scripting: Python & Go 

• CI/CD: GitLab CI

• Observability: Datadog, Opentelemetry

• Databases: PostgreSQL 

Your Responsibilities

Please note that we do not sponsor visa.

You will be responsible for the availability, security, and scalability of our platform. Your focus will be on building robust foundations rather than just maintaining.

• Architect & Build: Design and implement robust infrastructure solutions on AWS using Terraform. You won't just run existing scripts; you will architect new modules.

• System & Network Mastery: Ensure the "plumbing" works. Debug complex Linux performance issues, manage networking (VPC/VPN), and optimize database performance.

• Industrialize Research: Collaborate directly with Researchers to architect the production infrastructure required to run their latest algorithms and products. 

• Security & IAM: Manage accesses (IAM least-privilege principles) and help maintain our security posture.

• Observability: Monitor infrastructure health via Datadog, troubleshoot incidents, and participate in the on-call rotation.

What We Are Looking For:

• Experience & Education: Master’s degree/Engineering School and 2-4 years of concrete experience in a System, DevOps, or Cloud role.

• Languages: Fluent in French (daily office communication) and English (documentation & international collaboration).

Technical "Must-Haves":

• Linux & Network Internals: You don't just use the CLI; you understand the OS (kernel, memory, I/O) and can troubleshoot complex issues. You possess a solid grasp of networking fundamentals (TCP/IP, DNS, Load Balancing).

• Terraform: You can write infrastructure as code from scratch and understand state management.

• AWS: Solid understanding of core services and cloud architecture patterns.

• Kubernetes: You are comfortable deploying and debugging applications on K8s.

Why Join Kayrros?

• Impact: Work in a small, high-level infrastructure team where your architectural decisions matter.

• Purpose: Contribute to a fast-growing tech company solving real climate challenges.

• Growth: Learn fast in a complex data environment (Big Data, ML, High Availability).

• Culture: A diverse, international environment (French/English daily).

Perks: WeWork offices in central Paris, coffee, community events, and a hybrid work culture.

Our Commitment to You:

You don’t need to meet 100% of the requirements to apply. At Kayrros, we value potential over perfection. If you’re curious, motivated, and excited about what we do, we want to hear from you.