Senior Backend Engineer — AI-Driven AppSec & Scanning

United States Digital Space LLC; Paris; Sur place; EUR 90 000 - 130 000; Plein temps

Avantages offerts par ce poste

Significant equity

Top-tier health insurance

Meal vouchers

Gym subscription

Learning budgets

Premium equipment

Open-source time

Conference presentations

Résumé du poste

United States Digital Space LLC in Paris is seeking a Senior Backend Engineer to join a security-focused research team. You will champion innovation and translate research into production-grade solutions that scale.

You will design autonomous scanning systems, build a robust detection engine, and integrate AI-driven testing to improve coverage while controlling false positives across a Kubernetes-based platform.

Qualifications

• 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

Responsabilités

• 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.

Connaissances

Backend engineering

Security research

Distributed systems

Performance optimization

Cross-functional collaboration

Outils

Python

Go

Kubernetes

PostgreSQL

Kafka

Terraform

GitLab CI

Playwright

Description du poste

United States Digital Space LLC in Paris is seeking a Senior Backend Engineer to join a security-focused research team. You will champion innovation and translate research into production-grade solutions that scale.

You will design autonomous scanning systems, build a robust detection engine, and integrate AI-driven testing to improve coverage while controlling false positives across a Kubernetes-based platform.