🎯 The Role

We're looking for a Senior Software Engineer – OpenCTI to join our Engineering team and help us build, scale, and shape one of the most impactful open-source platforms in cyber threat intelligence. You’ll work closely with Engineering Managers, Product Owners, Staff Engineers, and a highly collaborative dev team to build high-quality, scalable solutions with global impact.

💼 Your Responsibilities

• Own and develop end-to-end features for the OpenCTI platform, from idea to production

• Collaborate with the product and engineering teams to ensure high-quality, user-focused experiences

• Help scale the team and technical processes, mentor junior developers, and improve internal tooling

• Contribute to the evolution of the OpenCTI tech stack (React, Node.js, GraphQL, Kubernetes)

• Write clean, well-documented code and participate in code reviews

• Engage with the open-source community, respond to feedback, and contribute to the broader ecosystem

• Work closely with EMs and Staff Engineers to make architectural and product decisions

🤝 Who You’ll Work With

• You’ll report to the Engineering Manager for OpenCTI

• You’ll collaborate with Staff Engineers, Product Owners, and fellow developers

• You’ll work cross-functionally with Product, Customer Success, and Security teams

• You’ll also engage with the broader open-source community and key external contributors

🧬 Profile We’re Looking For

• 7–8+ years of experience in software engineering with a strong focus on fullstack development

• Proficient in TypeScript/JavaScript, React, and Node.js (or similar)

• Experience building scalable, secure, and performant applications

• Deep understanding of modern API design (REST/GraphQL), frontend architecture, and backend services

• Comfortable working in a remote, async-first environment

• Product-oriented mindset: you care about UX, performance, and user impact

• Strong communication and ownership skills

• Bonus: experience with open-source contribution, cybersecurity tools, or GraphQL Relay

🚀 Why Join Filigran? More than just a job.

We believe that great work happens in a healthy, balanced, and collaborative environment. At Filigran, you’ll find:

✨ A culture of trust and well-being – Low stress, high impact. Our teams work in a calm, supportive atmosphere where you can do your best work without burnout.

🤝 A tight-knit, caring team – Collaboration and knowledge-sharing are at the heart of how we work.

🌍 True full-remote culture – Async-friendly, flexible hours, and autonomy to structure your days.

🚀 An ambitious, long-term vision – You’ll be building something that matters—and you’ll see its impact.

People often tell us “I’ve never worked anywhere like this” when they join. And that’s exactly what we aim for.

💰 Compensation & Benefits

• Competitive salary + BSPCE equity program

• Remote-first with flexible hours (EU time zones preferred)

• Premium health coverage via Alan

• Choice of laptop and remote work setup

• Paid time off and strong work-life balance

📕 Our Hiring Process

Simple, fast, and respectful:

1. TAM Call (30 min) – Get to know your background and motivations

2. Intro Call (45 min) – Meet the hiring manager, learn about the team and role

3. Technical Interview (60 min) – Dive into a coding or architecture challenge

4. Culture & Team Fit (30–45 min) – Chat with a future teammate to assess team alignment

5. Offer & Onboarding!

🚀 Ready to Join Us?

Apply now and help us build the future of cyber threat intelligence at scale through OpenCTI.