Senior Software Engineer (python) - XTM One

📋 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.
• • You will not just act as an implementer, but as a key contributor to the product vision, helping us solve complex challenges.
• • You'll design complex visualization flows, advanced logging capacities and agent configuration.
• • You will refine the software architecture to handle the integrations with the AI team at Filigran.
• • You will iterate fast to test concepts, being comfortable with refactoring or deleting code as the product vision evolves based on user feedback.
• • You will engage with the Open Source community (GitHub, Slack), answering user questions.
• • You will participate in the creation of development processes and team culture as one of the first hires in this new squad.
• • Direct report: You will report to the Engineering Manager.
• • Team: You will form the initial squad with the Engineering Manager, with plans for the team to grow fast.
• • Collaboration: You will collaborate with the VP of Tech, CTO, and AI team to align on technical standards and integration strategies with the wider ecosystem (OpenCTI / OpenAEV / OpenGRC).
• • Senior experience in Full Stack development, with strong proficiency in TypeScript and Python.
• • Architectural Mindset: You have the ability to think critically about software architecture, you have experience with genAI frameworks, being with Agentic, RAG or simple LLM usage, potentially leveraging MCP servers.
• • Ownership & Agility: You have experience launching projects and are comfortable navigating uncertainty.
• • Full Stack mastery: You are equally comfortable working on frontend interfaces (building intuitive wizards for complex configurations) and backend logic (API design, permission models).
• • Communication: Proficient in English and French.
• • Bonus Points:
• • Familiarity with Cyber Threat Intelligence (CTI) standards like STIX/TAXII or the MITRE ATT&CK framework.
• • Experience contributing to or maintaining Open Source projects.
• • XTM One is the Filigran AI-Native Threat Informed Defense platform, dedicated to create and run cybersecurity expert AI Agents, and host datasets and configs to be leveraged across products.
• • Every Product of the XTM Suite is connected to XTM One to leverage AI Agents for more proactive, easy-to-use platform.
• • Within XTM One, every AI Agents can use and correlate data cross products to make the most meaningful assessments and take the most relevant actions.
• • We’re a fast-growing, global, and fully remote company building open-source cybersecurity solutions, increasingly powered by AI, to help defense teams anticipate threats and act faster.
• • We believe we do work that matters, uniting defenders into a global community to make security more open, resilient & collaborative.
• • We make our work matter by building a culture grounded in our CORE values of Cohesion, Openness, Responsibility, and Equity.
• • Competitive pay + equity - everyone shares in our success.
• • Remote-first, flexible, and balanced - work that fits your life.
• • Your setup, your choice - pick the gear that works for you.
• • Twice-a-year gatherings - we meet in person for regional and global offsites to connect, collaborate, and strengthen our culture beyond the screen.
• • We enable cybersecurity through inclusion - from code to culture.
• • At Filigran, we are proud to be an equal opportunity employer.
• • We believe diversity of our people make our products and our team stronger.
• • We welcome talent of every background, identity, and lived experience, regardless of race, color, religion, gender, gender identity or expression, sexual orientation, national origin, age, disability, or veteran status.
• • What matters here is what you bring, not what you look like, where you’re from, or how you identify.
• • Apply now and help us build the future of the cybersecurity ecosystem, together.