Filigran
France
Senior AI-Native Software Engineer (Cybersecurity)
- AI
- Cybersecurity
AI Summary
Filigran seeks a Principal Software Engineer to define and drive the technical direction of XTM One, their AI-powered platform for threat-informed cybersecurity defense. The role owns platform architecture including agent runtime, MCP integrations, data/context layers, APIs, and multitenant SaaS/on-premises design, while setting engineering standards across the XTM Foundation for 60+ engineers. Candidates need 10+ years in software engineering, strong fullstack background with TypeScript and Python, expertise in distributed systems and system design, and hands-on experience building LLM/agent systems in production.
Key Highlights
Principal Software Engineer role owning the technical vision and architecture of XTM One, Filigran's AI-powered threat defense platform
Not a management role — focuses on technical craft, standards, and engineering principles across the XTM Foundation for 60+ engineers
Requires 10+ years in software engineering with strong fullstack background in TypeScript and Python
Must have experience building LLM/agent systems in production including agent frameworks, tool calling, MCP, RAG and vector search
Remote-first with competitive compensation, equity, 25 days PTO, volunteer days, and two annual in-person gatherings
Key Responsibilities
Define and carry the long-term technical vision and architecture of XTM One platform
Own agent runtime, orchestration, MCP integrations, data/context layers, APIs, and permission models
Design for both SaaS and on-premises deployment including multitenancy and enterprise constraints
Define engineering standards, code quality practices, CI/CD, and observability for AI workloads
Integrate XTM One with OpenCTI, OpenAEV, OpenGRC and future products across the XTM Foundation
Write production code, prototype new approaches, review critical PRs, and unblock engineers
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Technical Skills Required
Benefits & Perks
Competitive compensation + equity
Remote-first flexibility
25 days PTO baseline
Paid volunteer days
Equipment setup support
Two annual in-person get-togethers
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Nice to Have
Experience with LLMs and agent frameworks in production
Knowledge of RAG and vector search
Familiarity with tool calling and MCP (Model Context Protocol)
Background in cybersecurity domain
Job Description
The Company
Founded in 2022, Filigran is a global cybersecurity company on a mission to empower defense teams to be proactive through open-source solutions that uncover threats and drive action.
Filigran stands out in the cybersecurity ecosystem through its open-source, AI-powered and threat-informed approach to Continuous Threat Exposure Management (CTEM). Our eXtended Threat Management (XTM) platform brings together threat intelligence, exposure validation and cyber risk reduction, enabling organizations to better understand their threat landscape and take action.
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