AI Developer

Onyx-Conseil; City of Westminster; Hybrid; GBP 111,000 - 166,000; Full time

Job summary

LA International is recruiting multiple AI Developer roles in London to support a major enterprise AI program. These positions involve designing, developing, and integrating AI-powered applications using LLMs, RAG, and modern cloud services, with hybrid working and minimum two days onsite each week.

You will work across backend AI services and frontend interfaces, collaborating with architects, engineers, and business stakeholders to deliver scalable, secure solutions that enhance user

Qualifications

• Experience building AI-enabled applications with modern frameworks and tools.
• Strong expertise in LLM integration and prompt engineering.
• Experience designing RAG-based solutions and using vector databases.

Responsibilities

• Design, develop, and integrate AI-powered applications.
• Collaborate with architects, engineers, and stakeholders.
• Contribute to backend AI services and frontend interfaces as needed.

Skills

Python

LLM Integration

Prompt Engineering

RAG Architecture

Vector Databases

Embeddings

Tokenisation

AWS

REST APIs

Auth & API Gateway

Git

Tools

React

TypeScript

API Gateway

Job description

Job title: AI Developer (Backend & Frontend)

Location: London (Hybrid, Minimum 2 Days Onsite per Week)

Contract Length: 12 Months

IR35 Status: Inside IR35

Rate: Negotiable

We are currently recruiting for multiple AI Developer opportunities to support a major enterprise AI programme. These roles offer the chance to work at the forefront of AI innovation, developing intelligent applications and solutions that leverage the latest advancements in Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), and modern cloud technologies.

We are seeking both Backend AI Developers and Frontend AI Developers who are passionate about building scalable, secure, and user-focused AI solutions within a collaborative delivery environment.

The Role

As an AI Developer, you will play a key role in designing, developing, and integrating AI-powered applications and services. You will work closely with architects, engineers, and business stakeholders to deliver innovative solutions that drive business value and enhance user experiences.

Depending on your specialism, you will contribute to backend AI services, frontend user interfaces, or a combination of both.

Essential Skills & Experience

Python | LLM Integration | Prompt Engineering | RAG Architectures | Vector Databases | Embeddings & Tokenisation | AWS Services | Git / Version Control | REST APIs | Authentication, Authorisation, Firewalls & API Gateway

Frontend Experience (For Frontend Developers)

React or Other Modern Web Frameworks | TypeScript | UX Implementation | API Integration

Desirable Skills

MCP (Model Context Protocol) | IBM watsonx Orchestrate | CI/CD Pipelines

What We’re Looking For

• Experience developing AI-enabled applications using modern frameworks and technologies.
• Strong understanding of LLM integration and prompt engineering techniques.
• Experience designing and implementing RAG-based solutions.
• Knowledge of vector databases, embeddings, and tokenisation concepts.
• Experience working with cloud platforms, particularly AWS.
• Strong API development and integration skills.
• Understanding of secure application design, authentication, authorisation, and API gateways.
• Ability to work effectively within agile, multidisciplinary teams.

Why Apply?

• Join a high-profile AI transformation programme.
• Work with cutting-edge AI technologies and frameworks.
• Collaborate with industry-leading technical teams.
• Contribute to the development of innovative enterprise AI solutions.
• Long-term contract opportunity with flexible hybrid working arrangements.

LA International

LA International is an award-winning partner of choice for many of the world’s most influential companies and government organisations. Holding Enhanced Government Security Accreditation, we are recognised as the European market leader in the delivery of Security Cleared talent to organisations that demand the very highest levels of security, compliance and assurance.

A multiple award-winning organisation, having secured the prestigious Queens Award for Enterprise: International Trade over consecutive years. We are committed to fostering an inclusive, equitable and accessible workplace where everyone feels valued and supported. We welcome applications from all individuals, regardless of background or identity, and we encourage candidates who may not meet every listed requirement to still apply. If you require any adjustments or support during the recruitment process, please let us know and we will work with you to ensure a fair and accessible experience.

Please Note: If a high volume of applications is received, only candidates shortlisted will be contacted.