Location: Paris (75002) | Hybrid (2 days remote/week).
Our mission-driven engineering team (18 engineers, 4 technical leads, 3 product owners) is dedicated to redefining application security with cutting-edge detection and automation.
We operate at the forefront of technology and research from our Paris office.
About the RoleAs a Senior Backend Engineer you will work in a team with talented security researchers.
You’ll champion innovation, and ensure research translates into impactful production solutions.
What You'll DoAgentic scanning systems: Build systems that autonomously explore applications, maintain context, and execute complex testing strategies.
Security detection engine: Design and implement reliable, production-grade vulnerability detection logic (injection, auth issues, business logic flaws, etc.
AI-driven testing: Integrate LLMs and structured reasoning into scanning workflows to improve coverage and reduce false positives.
Distributed infrastructure: Work on systems that orchestrate thousands of concurrent scans (Kubernetes, queues, resource management).
Core platform design: Contribute to architecture decisions around memory systems, execution environments, and data models.
Our Tech Stack & FocusLanguages: Python (primary), Go (performance/network components)Runtime: Containerized workloads on Kubernetes (EKS), supporting long and resource-intensive scansScaling: Kubernetes Jobs & queue-driven autoscalingWeb Automation: Playwright + headless ChromiumData: PostgreSQL, S3-compatible object storage, Redis (limited use)Messaging: KafkaObservability: OpenTelemetry, Grafana CloudCI/CD & Infra: GitLab CI, TerraformPerks &.