Senior Backend Engineer | Cybersecurity AI AppSec

Escape; Paris; Hybride; EUR 90 000 - 140 000; Plein temps

Avantages offerts par ce poste

Significant equity (Stock Options/BSPC

Top-tier health insurance

Meal vouchers

Sport subscription

Learning budgets

Premium equipment

Open-source time

Conference talks

Résumé du poste

Escape is seeking a Senior Backend Engineer in Paris to join a security-focused team. You will translate research into production-grade scanning systems, focusing on agentic testing, AI-driven enhancements, and scalable, cost-efficient infrastructure.

You will work across Python and Go, running containerized workloads on Kubernetes, and collaborate with researchers and product teams to deliver impactful security solutions.

Qualifications

• 4+ years of backend engineering, security research, or applied R&D in a product environment.
• Strong fundamentals across systems, networking, and web architectures.
• Proficiency in Python, Go, or similar backend languages.
• Experience designing and shipping production systems with measurable impact.
• Ability to translate complex ideas into reliable, scalable implementations.
• Collaborates with engineering and security teams to deliver end-to-end solutions.

Responsabilités

• Build autonomous agentic scanning systems that explore applications and execute complex tests.
• Design and implement production-grade vulnerability detection logic.
• Integrate AI/LLMs into scanning workflows to improve coverage and reduce false positives.
• Develop distributed infrastructure to orchestrate thousands of concurrent scans on Kubernetes.
• Ensure performance, determinism, and cost-efficiency of scans.
• Contribute to core platform design including memory, execution environments, and data models.

Connaissances

Python

Go

Kubernetes

Security research

Distributed systems

Backend design

Outils

PostgreSQL

Redis

Kafka

Grafana

GitLab CI

Terraform

Playwright

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