At F5, we strive to bring a better digital world to life. Our teams empower organizations across the globe to create, secure, and run applications that enhance how we experience our evolving digital world. We are passionate about cybersecurity, from protecting consumers from fraud to enabling companies to focus on innovation.

Everything we do centers around people. That means we obsess over how to make the lives of our customers, and their customers, better. And it means we prioritize a diverse F5 community where each individual can thrive.

F5 is looking for an experienced Data Scientist, specialising in Artificial Intelligence and Large Language Models (LLMs), to build and deploy intelligent tools within our pioneering security platform. This role will focus on implementing cutting-edge AI/LLM solutions as practical features for AI red-teaming, defense, and securing agentic systems. You'll work hands-on to operationalise AI models, contributing directly to our platform's core intelligence.

Key Responsibilities:

Design, develop, fine-tune, and evaluate LLMs, agents and other deep learning models for AI security tasks (e.g., automated red-teaming operations, vulnerability detection, adversarial attack simulation and intelligent defense mechanisms).

Implement and deploy these AI/LLM-powered tools as robust, scalable features within CalypsoAI's security platform.

Develop and implement novel methods and tools for detecting and mitigating vulnerabilities, feeding directly into the AI Security platform.

Build and maintain end-to-end pipelines optimised for AI/LLM workflows, including data processing, training/fine-tuning, validation, deployment, and monitoring (MLOps for AI).

Collaborate closely with AI Researchers to productionize novel AI/LLM algorithms and security techniques.

Work with Software Engineers to integrate complex AI/LLM components seamlessly into our products

Optimise AI/LLM models for inference speed, cost, and resource utilisation.

Monitor model performance and behavior in production, particularly focusing on safety, alignment, and security vulnerabilities.

Apply software engineering best practices to AI/LLM development and deployment.

Required Qualifications:

BS or MS in Computer Science, Artificial Intelligence, Machine Learning, or a related quantitative field.

1-3 years of relevant professional experience, including hands-on experience developing, training, or fine tuning AI models, especially LLMs.

Experience with AI/LLM libraries (e.g. LangGraph, CrewAI, OpenAI SDK, Pytorch or TensorFlow, Hugging Face Transformers)

Understanding of LLM security vulnerabilities (e.g., prompt injection, data poisoning) and mitigation techniques.

Proven experience deploying AI/ML models into production environments.

Strong analytical and problem-solving skills applied to complex AI systems.

Preferred Qualifications:

Experience specifically fine tuning or training large scale language models.

Experience deploying LLMs or generative AI models using frameworks like vLLM, TGI, or cloud provider services.

Familiarity with techniques like Reinforcement Learning from Human Feedback (RLHF).

The Job Description is intended to be a general representation of the responsibilities and requirements of the job. However, the description may not be all-inclusive, and responsibilities and requirements are subject to change.

Please note that F5 only contacts candidates through F5 email address (ending with @f5.com) or auto email notification from Workday (ending with f5.com or @myworkday.com).

Equal Employment Opportunity

It is the policy of F5 to provide equal employment opportunities to all employees and employment applicants without regard to unlawful considerations of race, religion, color, national origin, sex, sexual orientation, gender identity or expression, age, sensory, physical, or mental disability, marital status, veteran or military status, genetic information, or any other classification protected by applicable local, state, or federal laws. This policy applies to all aspects of employment, including, but not limited to, hiring, job assignment, compensation, promotion, benefits, training, discipline, and termination. F5 offers a variety of reasonable accommodations for candidates. Requesting an accommodation is completely voluntary. F5 will assess the need for accommodations in the application process separately from those that may be needed to perform the job. Request by contacting accommodations@f5.com.