Senior AI Engineer: Payments, LLM & Agentic Systems

Fulcrum Digital Inc; Dublin; Hybrid; EUR 100,000 - 150,000; Full time

Job summary

Fulcrum Digital is seeking a Senior AI Engineer to join its Dublin-based engineering team, driving AI-powered solutions for payments platforms. You will own design and implementation of LLM-driven features, RAG pipelines, and agentic workflows, collaborating with cross-functional teams to deliver scalable, secure AI software in a hybrid work environment.

The role emphasizes building production-grade AI systems, guiding architectural decisions, and mentoring engineers while tackling complex

Qualifications

• Hands-on experience building AI-powered products using LLMs, RAG/retrieval systems, orchestration frameworks (e.g., LangChain, LlamaIndex), and tool-calling/function-calling patterns
• Strong grasp of agentic workflow concepts, including planning/reasoning loops, memory management, grounding, evaluation frameworks, safety mechanisms, and human-in-the-loop design
• 6+ years of software engineering experience building scalable, distributed systems and cloud-native applications in an agile environment

Responsibilities

• Lead team-level design for AI-powered services, including LLM and agent architecture, RAG pipelines, tool-calling integrations, data flows, and nonfunctional requirements such as scalability, reliability, performance, security, and operability
• Design, build, and productionise AI-powered features, including LLM integrations, RAG/retrieval systems, and agentic workflows using LangChain and LlamaIndex
• Implement agentic workflow patterns, including planning/reasoning loops, memory management, grounding, evaluation frameworks, safety mechanisms, and human-in-the-loop design
• Develop and optimise data-intensive applications and analytics capabilities using Databricks, Spark/PySpark, and related technologies to process and deliver data at scale
• Serve as a hands-on technical contributor, designing, coding, testing, debugging, and delivering production-quality software across the full engineering lifecycle

Skills

LLM orchestration

RAG pipelines

Agentic workflows

Team-level design

Problem solving

Education

Bachelor's degree in Computer Science, Software Engineering, or related field

Or equivalent practical experience

Tools

LangChain

LlamaIndex

Databricks

Spark/PySpark

Docker

Kubernetes

Job description

Fulcrum Digital is seeking a Senior AI Engineer to join its Dublin-based engineering team, driving AI-powered solutions for payments platforms. You will own design and implementation of LLM-driven features, RAG pipelines, and agentic workflows, collaborating with cross-functional teams to deliver scalable, secure AI software in a hybrid work environment.

The role emphasizes building production-grade AI systems, guiding architectural decisions, and mentoring engineers while tackling complex