Posted

LLM Application Engineer

by A1

  • Telecommunications
Germany
Remote
Full-time
Professional or Experienced
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Introduction

As an LLM Application Engineer, you will build the intelligence layer that powers A1's AI experiences.

You will work at the intersection of LLMs, software engineering, and product - designing agent workflows, improving model behaviour, and turning AI capabilities into reliable user experiences.

You will own problems end-to-end, from understanding user needs, designing Agentic workflows, integrating models and tools, building evaluation system and continuously improving AI behaviour in production.

Tasks

  • Build and ship LLM-powered applications and AI agent workflows
  • Design systems for reasoning, planning, memory, tool uuse and multi-step execution
  • Build reliable orchestration pipelines that turn probabilistic model outputs into predictable, observable, and safe actions
  • Integrate LLMs with APIs, databases, search, internal services, and external tools.
  • Develop prompting, context engineering, structured outputs, tool-calling, and other techniques to improve model behaviour
  • Build evaluation frameworks and datasets to measure AI quality, reliability, and regressions
  • Debug AI systems across the entire stack—from model behaviour and prompts to orchestration, backend services, and product UX
  • Optimise AI systems for quality, latency, and cost
  • Work closely with product and engineering teams to turn ambiguous product problems into working AI solutions
  • Establish production practices for observability, tracing, experimentation, evaluation, and continuous improvement

Requirements

  • Strong software engineering fundamentals with experience building AI-powered applications
  • Hands-on experience with LLMs, generative AI, or agent-based systems
  • Experience designing prompts, workflows, evaluations, or AI behaviour
  • Ability to write clean, production-quality code
  • Comfortable working across abstraction layers (model → system → product)
  • Strong problem-solving skills in ambiguous, fast-moving environments
  • Bias toward shipping, iteration, and continuous improvement
A1

A1Vienna, Austria

Industries
Fintech, InsurTech, Software Development
Company size
201-500
Growth
24%