Backend Engineer | Cybersecurity AI AppSec

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Paris, France

1 day ago

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Role details

Contract type

Permanent contract

Employment type

Full-time (> 32 hours)

Experience level

Expert

Experience required

4 years minimum

Working hours

Regular working hours

Job source

startup.jobs

Tech stack

Artificial Intelligence Amazon S3 Business Logic Software System Penetration Testing Cloud Computing Computer Networks Continuous Integration Distributed Systems Python (Programming Language) PostgreSQL Redis Web Application Security

+13 more

Large Language Models Grafana Software Security Backend Containerization Gitlab-ci Kubernetes Playwright Apache Kafka Build Tools Edge Detection Terraform Vulnerability Analysis

Job description

Join Escape, a fast-growing leader in AI-powered cybersecurity. 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., As 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 Do

Agentic 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).
Performance & reliability: Ensure scans are fast, deterministic, and cost-efficient despite high complexity and concurrency.
Core platform design: Contribute to architecture decisions around memory systems, execution environments, and data models.

Our Tech Stack & Focus

Languages: Python (primary), Go (performance/network components)
Runtime: Containerized workloads on Kubernetes (EKS), supporting long and resource-intensive scans
Scaling: Kubernetes Jobs & queue-driven autoscaling
Web Automation: Playwright + headless Chromium
Data: PostgreSQL, S3-compatible object storage, Redis (limited use)
Messaging: Kafka
Observability: OpenTelemetry, Grafana Cloud
CI/CD & Infra: GitLab CI, Terraform

Perks & Benefits

Significant equity (Stock Options/BSPCE) - become a core stakeholder in Escape’s journey
️ Top-tier health insurance with Alan
Meal vouchers with Swile
EGYM Wellpass sport subscription
Continuous learning: budgets for books and online courses
Premium equipment to support your work
Dedicated time for open-source projects
Present research at top international conferences (RSAC, BlackHat, DEFCON, BSides, APIDays)

Requirements

4+ years of experience in backend engineering, security research, or applied R&D in a product environment
Strong software engineering fundamentals and ability to work across domains (systems, networking, web architectures)
Proficient in at least one backend language (Python, Go, or similar)
Experience designing and shipping production systems with measurable impact
Ability to translate complex ideas or research into reliable, scalable implementations
Strong analytical mindset, with a focus on pragmatism and impact
Comfortable collaborating across engineering and security to deliver end-to-end solutions

Nice to have:

Experience in application security (web security, pentesting, bug bounty, etc.)
Exposure to AI/LLM-based systems
Familiarity with browser automation or large-scale distributed systems *, Ready to lead the next wave of AI-powered vulnerability detection? Apply now to join Escape and make a real impact in cybersecurity!