About this role

F5 Networks is hiring a mid-level Machine Learning Engineer based in Dublin, Ireland. The posting calls out experience with LLMs, Prompt Engineering, Security, Python.

Role: Machine Learning Engineer
Function: machine learning
Level: mid
Track: Individual contributor
Employment: Full-time
Location: Dublin, Ireland
Posted: Apr 20, 2026

AI Summary

Design and optimize prompts for Large Language Models and AI systems, focusing on security testing, red-teaming, and adversarial challenges. Collaborate with AI researchers to integrate prompts into F5's security platforms and maintain best practices documentation. Stay current with LLM advancements and contribute to AI security innovation.

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Job description

from F5 Networks careers

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.

Job Title: Prompt Engineer

Role Summary:

F5 is seeking a creative, analytical, and detail-oriented Prompt Engineer to join our innovative engineering team. As a Prompt Engineer, you will design, develop, test, and optimize prompts to interact securely and effectively with Large Language Models (LLMs) and emerging agentic AI systems. This role is at the forefront of F5's AI development strategy, contributing directly to our AI-powered platforms by enhancing security testing, addressing adversarial challenges, and driving innovation in natural language processing.

Your efforts will ensure the robustness, reliability, and safety of our AI solutions, enabling customers to confidently adopt AI and other emerging technologies while navigating the complexities of modern AI security landscapes.

This is an excerpt. Read the full job description on F5 Networks careers →

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