Senior AI Engineer - Autonomous Agents for Finance

Dex; Greater London; On-site; GBP 120,000 - 180,000; Full time

Job summary

Dex partners with a Series A fintech startup to build native, agentic infrastructure for high-stakes private equity diligence. You will join as a Senior AI Engineer owning the core harness from execution internals to retrieval pipelines and evaluators.

This role emphasizes streaming graph execution, interruptible tool calls, and robust, cited analysis through multimodal document search. You will collaborate with founders and private equity domain experts to turn complex diligence workflows into

Qualifications

• 5+ years building and scaling production backend services with AI-powered systems.
• Proven track record bringing LLM features, agents, or complex retrieval systems to production with eval results.
• Deep expertise in Python and production search/data infra such as OpenSearch, PostgreSQL, FastAPI

Responsibilities

• Design, ship, and scale autonomous agents that research companies, digest complex financial documents, and generate verifiable, cited analysis.
• Build proprietary foundation infrastructure, including a streaming-first graph execution framework and an interruptible, resumable code execution environment for tool use.
• Develop multimodal retrieval pipelines combining vision-language models for OCR, deep document search, and end-to-end claim attribution.
• Engineer production eval suites and feedback loops that serve as the definitive gate for whether harness modifications and model updates actually improve output quality.
• Collaborate closely with founders and private equity domain experts to turn complex, high-stakes diligence workflows into reliable programmatic systems.

Skills

Python

OpenSearch

PostgreSQL

FastAPI

Distributed queues

Tools

OpenAI API

LLM tooling

Job description

Dex partners with a Series A fintech startup to build native, agentic infrastructure for high-stakes private equity diligence. You will join as a Senior AI Engineer owning the core harness from execution internals to retrieval pipelines and evaluators.

This role emphasizes streaming graph execution, interruptible tool calls, and robust, cited analysis through multimodal document search. You will collaborate with founders and private equity domain experts to turn complex diligence workflows into