Fullstack Engineer, Generative AI (Backend… at Cracken · Brussels

About Company

Cracken is an applied AI lab building world’s first full kill chain proactive cyber platform. Built by cyber warfare-experienced operators and AI researchers Cracken keeps digital infrastructure resilient so businesses and societies operate.

We are growing and seeking an extremely talented software engineer to help us pioneer the future of cybersecurity.

Responsibilities

• Product Software Engineering: Hands-on engineering and testing of the product in various capacities, focusing on AI Agent features.
• Agents Framework Engineering: Hands-on engineering and testing of the internal agent’s framework (similar to LangChain / Haystack and others).
• Research & Development: Stay updated with the latest in AI and AI Agents. Provide relevant insights to the team and integrate innovations.

Requirements

• Ideally 5+ years of experience in Python (we can consider less experienced engineers, who learn very quickly and are ready to work in the startup environment)

• Experience with Generative AI

• Experience with Generative AI Agents will be a huge plus, specifically:

  — implementation of Generative AI Agents using Langchain / Haystack and others

  — implementation of RAG using LlamaIndex and other Advanced RAG frameworks

  — evaluation of AI Agent Performance

  — integration of AI Agents into Existing Systems

• Cybersecurity product background: worked on security-focused software or platforms.

Nice To Have

• Master’s or Ph.D. in Computer Science, Cybersecurity, or related fields.
• Interest or active participation in cybersecurity-related activities.
• Contributions to AI / CS/ Cybersecurity research, blogs, or whitepapers showcasing expertise.
• Experience in developing or contributing to open-source developer tools or frameworks.

Why Cracken?

• Real-world impact: Our technology is validated in nation-state operations and grounded in hands-on internal research
• Team with a mission: Ukrainian-heavy international team of PhDs, professors, and top-tier industry veterans, driven by intrinsic motivation shaped by real-world adversity
• Adaptive roles: We shape roles around exceptional talent — your ownership and drive will define your path
• Perfect timing: Operating at the intersection of AI, cybersecurity, and autonomous systems, Cracken is uniquely positioned to win against sophisticated adversaries

What we offer

• Ownership over a core cybersecurity product
• Direct collaboration with founders and elite cyber operators
• High autonomy and real impact on product direction
• Fully remote & flexible work setup
• Competitive compensation