Staff / Tech Lead Software Engineer - OpenCTI

🌀 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. Our eXtended Threat Management (XTM) platform brings together threat intelligence, exposure validation, and cyber risk reduction.

At the heart of Filigran is our open-source approach. Our vision is to unite defenders into a global community to make security more open, resilient, and collaborative.

🎯 The Role

We're looking for a Staff/Tech Lead Software Engineer to join the OpenCTI team with a high-leverage mission: drive technical collaboration with a key US-based partner actively contributing to OpenCTI. You'll be the technical anchor point ensuring this partnership produces efficient, high-quality contributions while driving technical vision and mentoring within Filigran's engineering team.

🧭 Core Mission

• Own and drive the technical relationship with a key external partner contributing to OpenCTI.
• Get involved early in technical refinement and design discussions for partner-driven features.
• Guide and coach partner developers on OpenCTI's architecture, coding standards, and best practices.
• Review and ensure the quality, consistency, and maintainability of external contributions before they land in core.
• Act as the bridge between the partner's engineering team and Filigran's internal roadmap, architecture, and standards.
• Proactively surface risks, blockers, and status to the Director of Engineering.

💼 Responsibilities

• Contribute directly to key parts of the codebase, especially where partner and core work intersect.
• Facilitate technical refinement sessions and design reviews with partner engineers.
• Supervise, challenge, and elevate the technical quality of partnership contributions.
• Promote OpenCTI's best practices, code quality, and performance standards.
• Coach engineers via pair programming, code reviews, and structured feedback.
• Collaborate with EMs/POs on task sizing, scope alignment, and roadmap planning.

✅ Requirements

• Strong experience with TypeScript.
• Hands-on experience with our technical stack: NodeJS, React, GraphQL, Elasticsearch, Redis.
• Strong hands-on experience leveraging AI tools (e.g. Copilot, Cursor, LLM-based agents) to accelerate development.
• Autonomy, ownership, and strong reporting/alerting habits.
• Cybersecurity / CTI experience is a strong plus.

🧬 Profile

• 8+ years in Software Engineering with a track record of reliable, iterative delivery.
• Comfortable in a full-remote, async-first environment across multiple time zones.
• Strong communication and diplomacy skills to influence external partners without formal authority.
• Experience working with external stakeholders or open-source projects is a plus.

💰 What We Offer

• Competitive compensation and equity
• Remote-first flexibility
• 25 days PTO baseline
• Volunteer days
• Equipment and remote work support setup
• Two annual in-person company and team get-togethers