Senior AI Engineer - MCP & RAG, LLM/Vector DB, AWS

Mastercard Inc.; Blanchardstown; On-site; EUR 110,000 - 140,000; Full time

Job summary

Mastercard is seeking a Senior Software Engineer (MCP & RAG) in Ireland to design and deliver scalable AI-powered solutions. You will build LLM-driven applications, knowledge bases with vector search, and robust APIs, aligning with Mastercard security and governance standards.

This role focuses on MCP, RAG, and enterprise cloud platforms, collaborating with product, engineering, and data teams. The ideal candidate has 5–10 years in software engineering, strong Python expertise, and hands-on

Qualifications

• 5–10 years of software engineering with a focus on AI/ML
• Strong background in distributed systems and scalable architectures
• Bachelor's or Master's in CS/AI/Data Science or related
• Proficient in Python for backend systems with production-grade APIs
• Experience with frontend frameworks (Angular or similar) for AI apps
• Hands-on with LLM frameworks (LangChain) and RAG
• Expertise in knowledge bases with vector search and embeddings
• Cloud exposure, especially AWS; familiarity with Cloudera/Databricks

Responsibilities

• Design and deliver AI-powered solutions using LLMs and RAG
• Build and maintain enterprise knowledge bases with vector search capabilities
• Develop LLM-driven applications using LangChain, prompts, orchestration
• Implement and integrate MCP or equivalent model interaction frameworks
• Architect scalable, secure solutions across AWS, Cloudera, and Databricks
• Collaborate with product, engineering, and data teams to translate business needs
• Develop robust APIs and microservices to support AI apps
• Ensure data governance, security, and compliance
• Monitor model performance and production reliability
• Mentor junior engineers and promote engineering best practices

Skills

AI/ML

Python

LLMs

LangChain

RAG

APIs

Microservices

AWS Cloud

Vector DB

Knowledge base

Education

Bachelor/Master CS or related

Tools

Docker

Kubernetes

Databricks

Cloudera

PGVector

GraphDB

Job description

Mastercard is seeking a Senior Software Engineer (MCP & RAG) in Ireland to design and deliver scalable AI-powered solutions. You will build LLM-driven applications, knowledge bases with vector search, and robust APIs, aligning with Mastercard security and governance standards.

This role focuses on MCP, RAG, and enterprise cloud platforms, collaborating with product, engineering, and data teams. The ideal candidate has 5–10 years in software engineering, strong Python expertise, and hands-on