AI-Powered LLM Engineer for Intelligent Workflows

ActAI; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

ActAI is seeking an LLM Application Engineer to build the intelligence layer powering AI experiences. You will work at the intersection of LLMs, software engineering, and product—designing agent workflows, improving model behaviour, and turning AI capabilities into reliable user experiences.

You will own problems end-to-end, from understanding user needs, designing agentic workflows, integrating models and tools, building evaluation systems and continuously improving AI behaviour in production.

Qualifications

• Strong software engineering fundamentals with experience building AI-powered applications.

Responsibilities

• Build and ship LLM-powered applications and AI agent workflows.

Skills

Strong software engineering

Hands-on LLMs

Prompt design

Production code

Cross-layer fluency

Problem solving

Shipping mindset

Tools

Python

LLM APIs

Agent frameworks

Vector databases

PyTorch/JAX

Job description

ActAI is seeking an LLM Application Engineer to build the intelligence layer powering AI experiences. You will work at the intersection of LLMs, software engineering, and product—designing agent workflows, improving model behaviour, and turning AI capabilities into reliable user experiences.

You will own problems end-to-end, from understanding user needs, designing agentic workflows, integrating models and tools, building evaluation systems and continuously improving AI behaviour in production.