Agentic AI ML Engineer — RL, LLMs & Multi-Agent (Hybrid)

WeAreTechWomen; Crawley; On-site; GBP 60,000 - 90,000; Full time

Benefits offered by this job

Hybrid working (two days at home)

Bonus scheme

Pension with employer contribution

Wellbeing Unmind app

Private medical & dental care

Cycle purchase scheme

Bank Holiday Swap

Job summary

Viridien is seeking a hands-on Machine Learning Engineer to design, develop and evaluate intelligent agent systems for real-world data. You will work across single and multi-agent workflows, integrating LLMs, vision-language models, retrieval systems and domain-specific tools.

Qualifications include a degree in CS or related field, strong Python, and experience with PyTorch/JAX/TensorFlow; familiarity with agentic AI concepts and RL is essential.

Qualifications

• Degree in computer science, artificial intelligence, machine learning, engineering or related discipline, or equivalent practical experience.
• Strong Python programming and software-engineering skills.
• Experience developing ML, generative AI or LLM applications.
• Practical experience with PyTorch, JAX, TensorFlow or similar frameworks.
• Understanding of agentic AI concepts such as tool calling, planning, memory and workflow orchestration.
• Knowledge of reinforcement learning, preference optimization or sequential decision-making.
• Experience designing model evaluations and translating research ideas into reliable software.

Responsibilities

• Design and develop single-agent and multi-agent systems for complex workflows.
• Build reasoning, planning, task decomposition, memory, tool-use and agent-collaboration capabilities.
• Integrate LLMs, vision-language models, retrieval systems and domain-specific tools.
• Fine-tune and adapt foundation models using supervised learning, preference optimisation and reinforcement learning where appropriate.
• Develop training environments, reward functions, graders and feedback mechanisms.
• Build evaluation, guardrail and monitoring approaches for agent reliability.
• Convert prototypes into production-ready APIs, services and reusable software components.

Skills

Python

PyTorch

JAX

TensorFlow

Agentic AI

Reinforcement learning

Code quality

Education

Bachelor's degree in CS/AI/Engineering

Tools

LangGraph

AutoGen

smolagents

tool integration

distributed training

GPU computing

Job description

Viridien is seeking a hands-on Machine Learning Engineer to design, develop and evaluate intelligent agent systems for real-world data. You will work across single and multi-agent workflows, integrating LLMs, vision-language models, retrieval systems and domain-specific tools.

Qualifications include a degree in CS or related field, strong Python, and experience with PyTorch/JAX/TensorFlow; familiarity with agentic AI concepts and RL is essential.