Senior Security Engineer

About the Role

### **About Kestra** Kestra is the **universal orchestration platform**: open source, declarative, and designed to orchestrate data pipelines, IT automation, business workflows, and AI/agentic systems. Trusted by **over 10,000 organizations worldwide**, including **JPMorgan Chase, Bloomberg, FILA, and Crédit Agricole**, Kestra orchestrates mission\-critical workloads at scale. The open\-source project has close to **30,000 GitHub stars**, hundreds of contributors, and a fast\-growing global community. ### **About the role** Kestra runs arbitrary, user\-defined code at scale. Our users write workflows that execute scripts, containers, and queries against their own production systems, through hundreds of community\-built plugins, on a platform whose entire source code is public. That is an unusually rich attack surface, and securing it is a genuinely hard engineering problem rather than a checklist exercise. **You would be our first dedicated security hire.** We're looking for a **Senior Security Engineer** to own and elevate the end\-to\-end security posture of our platform, infrastructure, and open\-source ecosystem. This is a unique, hybrid role for someone who excels at both sides of security: actively breaking systems to find vulnerabilities (hands\-on penetration testing) and actively fixing them (opening PRs, patching infrastructure, and managing supply chain risks). If you want to build a world\-class security foundation for a fast\-growing open\-source and SaaS platform, this role is for you. **This is a hands\-on engineering role, not a GRC or compliance one.** ### **What you would do** Your first six months would focus on the first three points below. The rest is where the role grows. * **Conduct hands\-on penetration testing** and threat modeling across our web application, APIs, control plane, and cloud environments. * **Manage end\-to\-end vulnerability tracking** across our codebases, software dependencies (SCA), container images, and cloud infrastructure. * **Proactively fix security flaws** by writing patches, submitting Pull Requests (PRs), or collaborating directly with product teams to guide remediation. * **Audit and harden our cloud infrastructure** (GCP, Kubernetes clusters, and networking configurations) against external and internal threats. * **Automate security tooling** into our CI/CD pipelines (SAST, DAST, dependency scanners) to catch CVEs before code reaches production. * **Perform security code reviews** and evaluate third\-party dependencies, open\-source integrations, and supply\-chain risks. * **Lead incident response** efforts and establish continuous monitoring, detection, and mitigation strategies. * **Own our public security posture** as an open\-source project: vulnerability disclosure process, CVE handling, security advisories, and the trust model of our plugin ecosystem. ### **Our Tech Stack** * **Security \& Vulnerability Tools**: Trivy, GitHub Security / Dependabot, Elastic Security * **Infrastructure**: Docker, Kubernetes, Terraform * **Cloud**: GCP * **Programming language**: Java, Typescript, Javascript * **Datastore**: PostgreSQL, Elasticsearch * **Queuing**: Redis, Kafka, AMQP * **Monitoring \& Logs**: ELK, Prometheus, Grafana * **Deployment \& Repository**: GitHub Actions, ArgoCD ### **What we are looking for** * **5\+ years of experience** in Security Engineering, Product Security, DevSecOps, or a combined Offensive/Defensive role. * **Strong hands\-on penetration testing background**, with proven ability to discover application, API, and network\-level vulnerabilities. * **A builder/fixer mindset**: You don't just export scanner PDFs; you can read code, understand exploits, write fixes, or provide clear remediation steps to engineers. * **Deep familiarity with cloud security** (AWS or GCP) and containerized environments (**Kubernetes**, Docker). * Experience with **dependency and supply\-chain security** (CVE management, open\-source licensing, SCA tools). * Fluent in English and comfortable working autonomously in a fully remote environment. * Adaptability to a fast\-paced open\-source startup environment where pragmatism and execution speed matter. ### **Perks \& Benefits** * **Work from anywhere**: We’re a remote\-first company, so you can work from wherever feels like home. Plus, you’ll have access to coworking spaces worldwide if you ever need a change of scenery. * **Health coverage**: From medical support, dental, and vision, we've got you covered. * **Home office setup on us**: We’ll provide all the equipment you need to work comfortably. ### **Our Hiring Process** We aim to move quickly (2\-3 weeks), but we can adjust the timeline if needed. * **Intro call** with the hiring manager (30 min) * **Technical scenario / Practical assessment** (2 hours, asynchronous homework focusing on threat assessment and remediation) * **Team chat** with one of your future colleagues (30 min) * **Final discussion** with one of our co\-founders (30 min)