Client-Facing Applied AI Engineer, Production-Ready Agents

Addepar1; Greater London; On-site; GBP 90,000 - 150,000; Full time

Job summary

Addepar London is seeking an Applied AI Engineer to join the growing AI team and build agentic systems from idea to production. You will work with Python, LLM APIs, and tool integrations, collaborating with clients and core engineering to ship features that matter.

The role requires strong software fundamentals, a bias for action, and comfort working across time zones with data-driven AI workflows. Occasional client work and travel to sites may be required.

Qualifications

• Extensive professional software engineering experience.
• Professional experience with Python.
• Experience working with LLM APIs (Claude, GPT, or similar) including function calling and structured outputs.
• Comfort with SQL for data exploration and building data-grounded AI workflows.
• Experience with AI-assisted development tools (Claude Code, Codex, or similar).
• BS/MS in Computer Science, Mathematics, or another quantitative field, or equivalent experience.

Responsibilities

• Build AI-powered agents and tools end-to-end: identify the problem with clients and domain experts, prototype quickly, evaluate rigorously, and ship to production
• Design and implement LLM integrations including prompt engineering, function calling, structured outputs, and retrieval-augmented workflows
• Define evaluation criteria and build test harnesses for AI systems where correctness is ambiguous and domain-specific
• Work directly with clients to understand their workflows, validate AI behavior, and iterate toward production quality
• Partner with core engineering teams to generalize client-specific work into product features
• Contribute to shared AI infrastructure (agent frameworks, tool integrations, deployment pipelines)
• Monitor and maintain production AI systems with attention to reliability, cost, and performance

Skills

Software engineering

Python

LLM APIs

SQL

AI tools

Agentic systems

Education

BS/MS in CS/Math or related field

Tools

Claude API

Codex

AWS

Job description

Addepar London is seeking an Applied AI Engineer to join the growing AI team and build agentic systems from idea to production. You will work with Python, LLM APIs, and tool integrations, collaborating with clients and core engineering to ship features that matter.

The role requires strong software fundamentals, a bias for action, and comfort working across time zones with data-driven AI workflows. Occasional client work and travel to sites may be required.