Senior Backend Engineer | Cybersecurity AI AppSec

Escape Technologies; Paris; Hybride; EUR 90 000 - 130 000; Plein temps

Avantages offerts par ce poste

Equity (Stock Options)

Health insurance

Meal vouchers

Sport subscription

Learning budgets

Premium equipment

Open-source time

Conference research opportunities

Résumé du poste

Escape Technologies is seeking a Senior Backend Engineer to join our Paris team. You will partner with security researchers to translate research into scalable production solutions and own critical backend components.

You will work with Python and Go, deployed on Kubernetes, handling large-scale scans, data processing, and distributed workflows. The role emphasizes performance, reliability, and collaboration across security and engineering domains.

Qualifications

• 4+ years of backend engineering, security research, or applied R&D in a product environment.

Responsabilités

• Build autonomous agentic scanning systems to explore applications and run complex tests.
• Design and implement production-grade security detection logic for injections, auth issues, and business logic flaws.
• Integrate AI-driven testing using LLMs to improve coverage and reduce false positives.
• Orchestrate thousands of concurrent scans using Kubernetes, queues, and resource management.
• Ensure scans are fast, deterministic, and cost-efficient while handling high complexity.
• Contribute to core platform design around memory systems, execution environments, and data models.

Connaissances

Backend engineering

Security research

R&D

Analytical mindset

Outils

Python

Go

Kubernetes

PostgreSQL

Redis

Kafka

OpenTelemetry

Grafana Cloud

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