Senior Backend Engineer | Cybersecurity AI AppSec

Arbeitnow; Paris; Hybride; EUR 90 000 - 130 000; Plein temps

Avantages offerts par ce poste

Significant equity (Stock Options/BSPC

Health insurance with Alan

Meal vouchers with Swile

EGYM Wellpass sport subscription

Continuous learning budgets for books/

Premium equipment for work

Open-source time for projects

Opportunity to present research at top

Résumé du poste

Escape, a Paris-based, fast-growing AI-powered cybersecurity company, is seeking a Senior Backend Engineer to join a security research team and translate research into production-grade scanning and detection systems.

You will own design and delivery of agentic scanning, AI-driven testing, and scalable infrastructure using Python, Go, Kubernetes, and modern data stores in a hybrid Paris office setup.

Qualifications

• 4+ years of backend engineering or security R&D in a product environment.
• Strong fundamentals across systems, networking, and web architectures.
• Experience shipping production systems with measurable impact.
• Ability to translate research into reliable implementations.

Responsabilités

• Build autonomous scanning systems that explore applications and test strategies.
• Design and implement production-grade vulnerability detection logic.
• Integrate AI-driven testing using LLMs into workflows.
• Work on distributed infrastructure orchestrating thousands of concurrent scans.
• Ensure performance, reliability, and cost efficiency.
• Contribute to core platform architecture decisions around memory and data models.

Connaissances

Backend engineering

Security research

Distributed systems

Research to production

System design

Outils

Python

Go

Kubernetes

Playwright

PostgreSQL

Redis

Kafka

OpenTelemetry

Grafana

GitLab CI

Terraform

Description du poste

Location

Paris (75002) | Hybrid (2 days remote/week)

About Escape

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.

About the Role

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)

About You

• 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