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Filigran Logo Filigran · IT - Software Development

Senior Software Engineer

France · Job Posted February 18, 2026
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Job Description

We're looking for a Senior Software Engineer to join our new XTM One team and contribute in shaping a state-of-the-art product and build the core platform for our XTM Suite. You'll work closely with the Engineering Manager and a small, agile squad to define the technical architecture and continue to enhance our unified AI solution that will unlock the true potential of our XTM Suite. This is a high-impact role where you will balance rapid iteration with code quality to lay the foundation for a scalable product.

Job Responsibility

  • Full Stack Architecture: Build a clean, scalable application deployable both as SaaS and On-Premise
  • Architectural Evolution: Refine the software architecture to handle integrations with the AI team
  • Rapid Prototyping: Iterate fast to test concepts
  • Community Management: Engage with the Open Source community (GitHub, Slack)
  • Team Structuring: Participate in the creation of development processes and team culture

Requirements

  • Senior experience in Full Stack development
  • Strong proficiency in TypeScript and Python
  • Architectural Mindset: ability to think critically about software architecture
  • Experience with genAI frameworks (Agentic, RAG or simple LLM usage)
  • Experience launching projects and comfortable navigating uncertainty
  • Full Stack mastery: comfortable working on frontend interfaces and backend logic
  • Proficient in English and French

Nice to have

  • Familiarity with Cyber Threat Intelligence (CTI) standards like STIX/TAXII or the MITRE ATT&CK framework
  • Experience contributing to or maintaining Open Source projects

What we offer

  • Competitive pay + equity
  • Remote-first, flexible, and balanced work
  • Your setup, your choice — pick the gear that works for you
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