Principal Software Engineer – XTM Integration

This is a fully remote position, open to applicants in France.

📋 Description

• Establish and take ownership of the technical principles for the XTM Integration team, including architecture patterns, code quality standards, tooling selections, CI/CD methodologies, AI-assisted development workflows, and benchmarking strategies.

• Ensure these principles are comprehended, adopted, and consistently executed across the team.

• Lead the advancement of the connector/integration framework utilized by OpenCTI, OpenAEV, and OpenGRC.

• Make critical technical decisions regarding integration architecture, including data flow design, error management, retry strategies, observability, performance, and security.

• Stay informed about the evolving ecosystem by assessing new tools, libraries, and patterns ahead of the team's needs.

• Act as a technical steward for Filigran's open-source integration ecosystem.

• Establish and enforce contribution guidelines, code standards, and documentation practices that facilitate community members in developing their own connectors.

• Interact with the open-source community by reviewing external contributions, offering technical guidance, and representing Filigran's engineering culture publicly.

• Design integration APIs and SDKs with a focus on enhancing the external developer experience.

• Actively participate in the XTM Foundation as a full member.

⛳️ Requirements

• 8+ years of experience in software engineering, demonstrating a history of technical leadership in complex, production-grade systems.

• Extensive expertise in Python, as it is the primary language of the XTM Integration ecosystem.

• Strong understanding of integration and data pipeline patterns, including event-driven architectures, ETL/ELT, API design (REST, GraphQL, webhooks), authentication flows, rate limiting, and error recovery.

• Proven capability to define and uphold technical standards; you have been the one who elevates the team's performance rather than merely following existing standards.

• A robust open-source mindset, recognizing the importance of building software for an external community rather than just for internal users.

• Exceptional written communication skills; you can produce design documents, contribution guides, or code review comments that are informative and educational for others.

• Comfortable operating in a remote-first, asynchronous culture; an effective communicator in English.

• A sense of autonomy and ownership; you proactively address challenges, seek resolutions without waiting for permission, and empower others instead of becoming a bottleneck.

• Bonus: Experience with cybersecurity tools (SIEM, EDR, SOAR, threat intelligence platforms); familiarity with STIX/TAXII or other CTI standards; previous experience in open-source maintainership.

🏝️ Benefits

• Competitive compensation plus equity – everyone shares in our success.

• Remote-first, flexible, and balanced work arrangements – work that aligns with your lifestyle.

• Your equipment, your choice – select the tools that best suit your needs.

• Biannual gatherings – we meet in person for regional and global offsites to connect, collaborate, and strengthen our culture beyond the digital realm.