AI Engineer

Country: Ireland

Req ID: 526260

Job Type: Full Time

Workplace Type: Hybrid

Seniority Level: Mid-Senior Level

About CRH

We are CRH, and we are committed to contributing to a more resilient and sustainable built environment. We understand the wider impact our businesses can make in supporting human activity. We continue to do this through the delivery of unique, superior building materials and products for use in road and critical utility infrastructure, commercial building projects and outdoor living solutions.

CRH (NYSE: CRH, LSE: CRH) is the leading provider of building materials solutions that build, connect and improve our world. Employing c.78,500 people at c.3,390 operating locations in 28 countries, CRH has market leadership positions in both North America and Europe. As the essential partner for transportation and critical utility infrastructure projects, complex non-residential construction and outdoor living solutions, CRH’s unique offering of materials, products and value-added services helps to deliver a more resilient and sustainable built environment. The company is ranked among sector leaders by Environmental, Social and Governance (ESG) rating agencies. A Fortune 500 company, CRH’s shares are listed on the NYSE and LSE.

Without you noticing our products, we are everywhere you live, work, and relax.

Our project portfolio includes some of the most sustainable and cutting-edge building projects around the world. Think of the asphalt on the Silverstone Grand Prix Circuit, the Paris Metro Rail project, but also the Louis Vuitton Museum in Paris, parts of the Burj Khalifa, and the Kennedy Space Centre.

Learn more about us through the following Link.

Position Overview

We build AI Agents on an internal Agentic AI platform. The platform supports creating and configuring agents, connecting capabilities via MCP, and enriching agent responses using a file-based knowledge base with built-in document and data RAG capabilities. We focus on building high business value, production-ready agents, integrations, and evaluation workflows.

We are looking for a strong mid-level AI Engineer with a hybrid profile - someone who can both build production-ready AI solutions and lead business-facing conversations to identify, qualify, and shape high-value use cases. You will design and build AI Agents on our internal Agentic AI platform, develop MCP servers, engineer prompts and agentic workflows, and work directly with business stakeholders to extract requirements, guide business case development, and assess the strategic value of proposed AI use cases.

Key Tasks and Responsibilities

Business Engagement & Use Case Development

Lead structured discovery sessions with business stakeholders to extract requirements and map existing processes

Assess and qualify inbound AI use case requests - evaluating feasibility, complexity, and business value

Guide business teams through the process of building a business case for agentic AI initiatives

Facilitate workshops and conversations to translate business problems into well-defined AI solution briefs

Act as the bridge between business and engineering - communicating technical constraints and possibilities in accessible business language

Collaborate with business stakeholders to gather requirements and translate business processes into agent workflows

Design agent conversation flows and user experiences that align with business objectives, and iterate based on user feedback and business success metrics

AI Engineering

Create and configure new AI Agents on our Agentic AI platform

Design, test, and iterate agent instructions/prompts (context engineering) to ensure correct and consistent behaviour

Connect and configure tools via MCP (define tool contracts, validate behaviour, troubleshoot failures)

Build new MCP servers when needed (wrap APIs/flows into tools with proper auth, error handling, and logging)

Design end-to-end agentic workflows incorporating analytics pipelines and AI models

Upload, organise, and maintain files in an agent knowledge base to improve grounding and retrieval quality

Create and maintain search indexes for file corpora when required (manual index setup and refresh process)

Set up and run evaluations (offline test sets, regression checks, metrics tracking) using MLflow

Requirements

Business & Communication Skills

Strong communication skills with the ability to lead business conversations, run discovery workshops, and translate requirements into technical specifications

Experience in business analysis, requirements gathering, or customer-facing technical roles

Ability to assess the business value and feasibility of AI use cases, including ROI framing and prioritisation

Ability to think from the end-user perspective and optimise agent UX for business outcomes

Comfortable facilitating workshops and leading conversations with non-technical stakeholders

AI Engineering

3+ years of professional software engineering experience (backend focus; Python preferred)

2+ years building LLM-powered applications, including AI agents (tool use, RAG/knowledge base grounding)

Solid understanding of LLMs and their behaviour (tokens/context windows, prompting patterns, hallucinations & grounding, latency/cost trade-offs)

Strong experience with prompt/instruction design and iteration (context engineering) and debugging agent behaviour

Solid understanding of agent architectures (planning, tool execution, memory/context, retrieval grounding, safety/guardrails) with hands-on delivery experience

Hands-on experience integrating external systems and tools via MCP (connecting tools, designing/implementing MCP servers)

Experience implementing secure integrations using OAuth 2.0 / OIDC and understanding identity concepts such as Azure Entra ID (apps, tenants, scopes/roles, consent)

Solid software engineering fundamentals: Git, code reviews, testing, logging/monitoring, performance-aware development

Good spoken English and ability to work in a highly integrated Agile team

Nice to Have

Experience with one cloud provider (preferably Azure / AWS / GCP) for deploying or operating services

Experience using an agentic framework (LangChain, Semantic Kernel, Autogen, CrewAI, or similar)

Experience with search indexing/retrieval systems (schema design, ingestion pipelines, index refresh automation)

Familiarity with containerisation (Docker) and basic CI/CD practices for backend services

Exposure to AI value frameworks or benefit realisation methodologies

Experience working in a Centre of Excellence (CoE), innovation, or transformation function

Familiarity with AI governance considerations when assessing use cases (data privacy, risk, compliance)

Experience with MCP server development from scratch (not just configuration)

What CRH Offers You

A culture that values opportunity for growth, development, and internal promotion

Highly competitive salary package

Comprehensive secondary benefits

Significant contribution to your pension plan

Health and wellness programs, including an on-site gym and fitness classes

Excellent opportunities to develop and progress with a global organization

Connect your future to CRH

We are curious to learn more about you. At CRH, we believe our mutual differences contribute to the healthy, productive, and enjoyable workspace we create. Please introduce yourself and send us your application. Following a positive review of your application, you will be invited to an introductory call with one of our Recruiters.

Is this role not for you, but do you know someone who would love to join the team? Please let us know!

CRH finds it important that vacancies are shared to individuals that may find them interesting and/or could be suitable for the role

Please contact our recruitment team at careers@crh.com.

Benefits/perks listed above may vary depending on the nature of the employment with CRH and the country where you work.

Please note that we cannot accept any applications submitted through email for GDPR purposes. Candidates must apply through our job portal.

We do not accept candidate introductions for this position from recruitment agencies, unless you have been instructed to do so by our recruitment team.