Cracken Jobs

Fullstack Engineer, Generative AI (Backend Focus)

Sorry, this job was removed at 10:02 p.m. (GMT) on Tuesday, May 26, 2026

United Kingdom

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About Company

Cracken is a fast-growing Silicon Valley-based startup built by elite nation-state and commercial operators who defended critical cyber infrastructure during the war in Ukraine, researched AI and cybersecurity at MIT and Kyiv Polytechnic, and led teams at Apple, Google, Palo Alto Networks, HackerOne, DIU, Comcast, HP, and more.

We tame Cracken, an AI Agent for Cybersecurity with human-in-the-loop. Our flagship product, is an agentic AI copilot drastically scaling cyber assessments for enterprises and governments.

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: Validated in nation-state operations and supported by internal researches.
Team's Unique Motivation & Expertise: Ukrainian-heavy international team with Ph.D.s, professors, and top-tier industry veterans, driven by intrinsic passion forged through exposure to the hardships of war.
Impeccable Timing & Positioning: At the cutting edge of AI, cybersecurity, and autonomous systems, Cracken is best positioned to win the race against adversaries.

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