Senior AI Platform Architect - Remote Contract

GCS Recruitment; United States; Remote; USD 112,000 - 176,000; Full time

Job summary

GCS Recruitment seeks a Senior AI Engineer (Contract) to lead the architecture of an enterprise AI agent platform. You will evaluate LLMs, design orchestration, memory, and retrieval-augmented generation, and guide governance and testing strategies.

This role blends hands-on engineering with technical leadership across business and technology leaders. You will drive data integration from enterprise sources, establish scalability and security practices, and mentor engineering teams while

Qualifications

• Proven experience building production AI applications and platforms.
• Deep understanding of LLMs, agentic architectures, and retrieval-based systems.
• Experience with AI orchestration frameworks, memory systems, and multi-agent workflows.
• Expertise in prompt engineering, evaluation frameworks, and model optimisation.
• Familiarity with cloud-based AI services and infrastructure.
• Experience integrating diverse enterprise data sources and knowledge repositories.
• Strong software engineering background with emphasis on scalability and platform design.
• Ability to balance technical excellence with business value and cost efficiency.

Responsibilities

• Define and implement the architecture for an enterprise AI agent platform.
• Evaluate and recommend suitable large language models, tooling, and deployment approaches.
• Design and optimise agent orchestration, memory, and retrieval-augmented generation capabilities.
• Develop approaches for prompt management, testing, versioning, and governance.
• Integrate structured and unstructured data sources from across the business.
• Establish best practices for scalability, performance, security, and maintainability.
• Monitor and optimise AI usage, token consumption, and operational costs.
• Assess commercial and open-source AI technologies and recommend fit-for-purpose solutions.
• Provide technical leadership, mentoring, and architectural guidance to engineering stakeholders.
• Translate complex technical decisions into clear recommendations for business and technology leaders.

Skills

Production-grade AI

LLMs

Agentic AI

Retrieval systems

Orchestration frameworks

Memory systems

Multi-agent workflows

Prompt engineering

Model evaluation

Cloud services

Data integration

Software engineering

Job description

Senior AI Engineer (Contract)

We are partnering with a large international professional services organisation undertaking a major AI transformation initiative. The company is developing a next-generation AI platform that will enable business users to create, deploy, manage, and scale AI-powered agents using proprietary enterprise data and knowledge sources.

As a Senior AI Engineer, you will play a key role in designing and evolving the platform architecture, bringing together existing capabilities into a scalable, secure, and production-ready solution. You will assess technologies, define architectural direction, and guide decisions across agent frameworks, retrieval systems, model integration, orchestration, and operational governance.

This position combines hands-on engineering with technical leadership and offers significant influence over the future direction of the platform.

Responsibilities

• Define and implement the architecture for an enterprise AI agent platform.
• Evaluate and recommend suitable large language models, tooling, and deployment approaches.
• Design and optimise agent orchestration, memory, and retrieval-augmented generation (RAG) capabilities.
• Develop approaches for prompt management, testing, versioning, and governance.
• Integrate structured and unstructured data sources from across the business.
• Establish best practices for scalability, performance, security, and maintainability.
• Monitor and optimise AI usage, token consumption, and operational costs.
• Assess commercial and open-source AI technologies and recommend fit-for-purpose solutions.
• Provide technical leadership, mentoring, and architectural guidance to engineering stakeholders.
• Translate complex technical decisions into clear recommendations for business and technology leaders.

Desired Experience

• Strong experience building production-grade AI applications and platforms.
• Deep understanding of LLMs, agentic AI architectures, and retrieval-based systems.
• Experience with AI orchestration frameworks, memory systems, and multi-agent workflows.
• Expertise in prompt engineering, evaluation frameworks, and model optimisation.
• Familiarity with modern cloud-based AI services and infrastructure.
• Experience integrating diverse enterprise data sources and knowledge repositories.
• Strong software engineering background with an emphasis on scalability and platform design.
• Ability to balance technical excellence with business value, cost efficiency, and user adoption.

Contract Details

• Initial 3-month contract with potential for extension.
• Remote within Europe.
• Occasional in-person collaboration sessions may be required.

GCS is acting as an Employment Business in relation to this vacancy.