Production AI Engineer (GenAI) – Contract, Heathrow

Hyra; Greater London; On-site; GBP 117,000 - 179,000; Full time

Job summary

AirlineTech Ltd. in London (Heathrow) is seeking an AI/GenAI Engineer for a contract role. You will build, evaluate, and operate AI applications, agents, and reusable tooling that other teams can leverage in real operating conditions.

The role focuses on applying LLM patterns, building deterministic APIs, and implementing guardrails, traceability, and cost controls. You’ll ship production-ready code and work in a fast-paced airline tech environment.

Qualifications

• Strong software engineering fundamentals: APIs, cloud systems, testing, and production operations.
• Practical knowledge of LLM application patterns.
• A habit of improving systems through measurable evaluation, not subjective demos.

Responsibilities

• Implement agents, AI-assisted workflows, retrieval systems, and model integrations
• Build deterministic tools and APIs for agents to interact with enterprise systems
• Develop automated evaluations for quality, safety, reliability, and regression detection
• Implement guardrails, permissions, traceability, fallback, and human-escalation mechanisms
• Monitor cost, latency, behaviour, and business outcomes
• Diagnose production failures and keep improving performance
• Contribute reusable components, standards, and reference implementations

Skills

APIs & cloud systems

Testing & production ops

LLM application patterns

System evaluation

Job description

AirlineTech Ltd. in London (Heathrow) is seeking an AI/GenAI Engineer for a contract role. You will build, evaluate, and operate AI applications, agents, and reusable tooling that other teams can leverage in real operating conditions.

The role focuses on applying LLM patterns, building deterministic APIs, and implementing guardrails, traceability, and cost controls. You’ll ship production-ready code and work in a fast-paced airline tech environment.