Senior Software Engineer (Platform, Security Focused)

Join our dedicated Platform team as a Senior Software Engineer with a focus on security. You will be responsible for building and operating the foundation that every product team at casavi relies on. Your main focus will be on application security, ensuring our product remains robust and reliable in the face of modern security threats. You will also collaborate closely with fellow engineers and product teams to make our platform more reliable, scalable, and easy to build on. Enjoy flexible working hours, personal development opportunities, team events, health and wellbeing benefits, and the option to work remotely from anywhere in the EU.

• Evoluer la plateforme en possédant et en développant des fonctionnalités clés du produit, y compris l'authentification, l'internationalisation et les drapeaux de fonctionnalités.
• Se concentrer sur la sécurité des applications en mettant en œuvre des portes de qualité automatisées, des tests de sécurité réguliers et des normes de sécurité solides intégrées dans le cycle de vie du développement logiciel.
• Collaborer étroitement avec d'autres ingénieurs pour rendre la plateforme plus fiable, évolutive et facile à utiliser.
• You have several years of experience working with TypeScript (our tech stack includes Node.js, REST API, MySQL, MongoDB, Nest.js, React) and, ideally, also Python (our Python stack: Flask, FastAPI, MongoDB)
• You care about Application Security deeply and have a proven track record of establishing secure SDLC in software engineering teams
• Ideally, you have strong experience with observability tooling (Prometheus/Grafana) and monitoring production systems
• You are a power user of AI-based tools (GitHub Copilot, Claude Code, Codex, etc.), and you know how to use them to build lightweight internal tooling and automation safely and responsibly
• You live in Germany
• You are a strong communicator, and your English is at a very good level (>C1)
• You understand cloud-native security principles and have experience securing pipelines, container images, and infrastructure (e.g., using AWS Secrets Manager, Vault, Trivy, Snyk, or similar tooling)
• You have proven hands-on experience running production Kubernetes clusters and managing cloud infrastructure. You know AWS, Terraform, Helm, GitOps (ideally ArgoCD), and CI/CD pipelines (ideally GitLab CI)
• You'd rather script and orchestrate an agentic workflow than stand up a heavyweight developer portal
• You have excellent analytical & problem-solving skills and enjoy owning problems end-to-end, from root cause to fix