Senior Applied AI Engineer

Responsibilities

• Build and ship AI-powered product features for Pleo’s customers, owning outcomes end-to-end.
• Design and build end-to-end RAG systems, including chunking strategies, embedding model selection, and retrieval optimization.
• Own the full AI-product lifecycle, including prompt design, agentic loops, and safe production deployment.
• Build evaluation datasets and automated pipelines to ensure AI feature quality.
• Instrument AI features for production observability, such as logging, drift detection, and quality monitoring.
• Collaborate with Product and Design teams to scope AI features from first principles.
• Partner with the GenAI Platform team to identify infrastructure needs and champion platform tooling.

Requirements

• Proven experience shipping customer-facing AI features using LLMs into real production systems.
• Deep practical experience with RAG system design and the full retrieval pipeline (vector databases, hybrid search, re-ranking).
• Strong Python engineering skills with a focus on production-grade, tested, and maintainable code.
• Experience building APIs and data retrieval pipelines that feed context into AI systems.
• Experience with agentic system patterns, including tool use and multi-step orchestration.
• Familiarity with public cloud providers such as AWS or GCP.
• Ability to work within a polyglot environment and contribute to a Kotlin stack when necessary.

Preferred Qualifications

• Experience building and operating systematic evaluation frameworks for LLM-based systems.
• Strong data intuition regarding data quality, schema, and retrieval architecture.
• Ability to explain complex AI trade-offs to non-technical stakeholders.

Benefits

• Your own Pleo card for seamless spending.
• Catered lunches or a lunch allowance for work days.
• Comprehensive private healthcare options.
• 25 days of holiday plus public holidays.
• Flexible working options, including hybrid and fully remote setups.
• Access to mental health and well-being support via MyndUp.
• Paid parental leave.

About the Company

Pleo is a spend management platform that makes managing money seamless and effective for finance teams and employees. With over 40,000 customers and a decade of unique spend data, we are building the future of business spending through innovative, AI-powered solutions.