[Hiring] Senior Software Engineer @Filigran

Role Description

We’re looking for a Senior Software Engineer to join the OpenCTI team and contribute to the core of our open-source platform. In this role, you will work on features and technical topics that are central to how users interact with and rely on OpenCTI, with a focus on product performances and stability.

You will bring strong technical expertise and have a direct impact on the product roadmap, collaborating closely with product, engineering, and community contributors. The role involves working across a modern stack including Node.js, TypeScript, React, GraphQL, and Elasticsearch.

Qualifications

• 7+ years of experience as a Software Engineer, with solid exposure to complex, production-grade systems.
• Strong proficiency in a modern JavaScript/TypeScript stack, based on Node.js and GraphQL, and strong experience in technologies matching our backend stack (Elasticsearch, Redis, RabbitMQ).
• Comfortable working in a remote, async-first environment, with strong written communication skills.
• Proven ability to work autonomously, take ownership of technical topics, and drive initiatives from design to delivery with proactive reporting.
• A collaborative mindset, with a strong sense of team spirit and a willingness to mentor and support less experienced engineers.
• Ability to challenge existing solutions, address technical debt, and contribute to long-term architectural improvements.
• Experience contributing to or working with open-source projects is a strong plus.

Requirements

• Contribute actively to the OpenCTI codebase, with strong ownership of new features and continuous improvements.
• Identify, investigate, and resolve bugs.
• Participate in technical brainstorming and task refinement, challenging both new proposals and existing implementations.
• Take part in the on-call rotation and act proactively during incidents to drive resolution.
• Mentor junior and mid-level engineers, supporting their technical growth.
• Address technical debt and legacy pain points.
• Lead or facilitate technical workgroups to explore and align on engineering topics.
• Review pull requests from internal teams and the open-source community.
• Contribute to documentation and the shared knowledge base.

Benefits

• 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.

Company Description

Filigran, founded in October 2022, stands out in the cybertech ecosystem for its commitment to revolutionizing cyber threat management with a proactive approach. Its mission is to develop innovative open-source solutions designed to anticipate cyber threats, identify security gaps, and strengthen organizational security posture. Filigran solutions are now trusted by over 6,000 public and private organizations worldwide.