Agentic AI & RL Engineer: Scale Intelligent Agents

Viridien; Crawley; Hybrid; GBP 65,000 - 100,000; Full time

Benefits offered by this job

Competitive salary

Highly attractive bonus scheme

Hybrid working with two days at home

Company pension with generous employer

Wellbeing Unmind app

Discount platform and cycles

Private Medical & Dental care

Holiday buy/sell

Relaxed dress code

Job summary

Viridien, an advanced technology, digital and Earth data company, seeks a hands-on Machine Learning Engineer to design, develop and evaluate intelligent agent systems for real-world data challenges. You will turn emerging AI methods into reliable, scalable production-ready solutions.

The role involves building single- and multi-agent systems, integrating LLMs, creating training environments, and ensuring robust evaluation and monitoring. Hybrid work with two days at home is offered.

Qualifications

• Degree or equivalent practical experience in computer science or related field.
• Strong Python programming and software-engineering skills.
• Experience developing machine-learning, generative AI or LLM applications.
• Practical experience with PyTorch, JAX, TensorFlow or a similar framework.
• Understanding of agentic AI concepts such as tool calling, planning, memory and workflow orchestration.
• Knowledge of reinforcement learning, preference optimisation 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 programming

Software engineering

Machine-learning applications

LLM applications

Agentic AI concepts

Reinforcement learning

Model evaluation

Education

Degree in computer science or related field

Tools

PyTorch

JAX

TensorFlow

LangGraph

AutoGen

smolagents

Job description

Viridien, an advanced technology, digital and Earth data company, seeks a hands-on Machine Learning Engineer to design, develop and evaluate intelligent agent systems for real-world data challenges. You will turn emerging AI methods into reliable, scalable production-ready solutions.

The role involves building single- and multi-agent systems, integrating LLMs, creating training environments, and ensuring robust evaluation and monitoring. Hybrid work with two days at home is offered.