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Urgent! Principal Engineer Position in Dublin - Needl

Principal Engineer

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Needl Owner | Director of Contracts | Technology Search Expert | Dublin Tech Talks Founder |Expert in helping organisations scale

Role : Staff/Principal Engineer – Internal LLM & AI Developer Tooling

Location : Hybrid / Remote (South Dublin)

Tech Stack : Tool-agnostic with .NET backend environment

Start Date : ASAP

Salary - 120 - 140k

About the Role

We’re hiring a Staff or Principal-level engineer to lead the build of a new internal AI/LLM-powered productivity tool for our client.

You’ll be designing and developing a suite of tools that use LLMs and automation to:

  • Search internal codebases and documentation using natural language
  • Auto-suggest or generate code based on internal libraries and patterns
  • Reduce time spent on manual or repetitive engineering tasks

This is a greenfield role with full backing from the CTO.

You’ll lead design decisions, evaluate LLM frameworks (e.g., OpenAI, Azure OpenAI, HuggingFace, LangChain), but key to the role is this person will architect and build robust integrations into our existing .NET-based environment.

Responsibilities

  • Design and build internal applications powered by LLMs
  • Integrate AI tooling with internal repositories, documentation and dev workflows
  • Drive architectural decisions and establish a framework for AI-based tooling
  • Collaborate with internal engineering teams to identify productivity bottlenecks
  • Deliver measurable efficiency gains and user delight through AI

Requirements

  • Expert level of software engineering, with exposure to enterprise environments
  • Strong hands-on experience with AI/ML tooling, LLM APIs, embeddings, vector DBs, etc.

  • Strong backend architecture skills (.NET experience helpful but not mandatory)
  • Experience designing internal tools used by developers
  • A practical mindset: You can prototype fast and ship usable tools, not just research ideas

Seniority level

  • Seniority level

    Mid-Senior level

Employment type

  • Employment type

    Full-time

Job function

  • Job function

    Information Technology
  • Industries

    Technology, Information and Media, Software Development, and IT System Custom Software Development

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Required Skill Profession

Design & Development


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