Senior AI Engineer: Build Autonomous Financial Agents

Dex; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Dex is seeking a Senior AI Engineer to own the core agent harness end to end, delivering streaming graph execution and interruptible tool use. You will build end-to-end autonomous agents that can research companies, digest complex documents, and provide verifiable, cited analyses for high-stakes diligence.

You will craft proprietary infrastructure, multimodal retrieval pipelines, and robust evaluation suites to ensure reliability, with close collaboration to founders and PE experts in a

Qualifications

• 5+ years building and scaling production backend services.
• Proven track record taking LLM features or complex retrieval systems to production.
• Expertise in Python and production search/data infra (OpenSearch, PostgreSQL, FastAPI).
• Eval-driven mindset with benchmarking, verification and error analysis.

Responsibilities

• Design, ship, and scale autonomous agents that research companies 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 and deep document search.
• Engineer production eval suites and feedback loops that serve as gate for harness modifications and model updates.
• Collaborate with founders and private equity domain experts to turn complex diligence workflows into reliable programmatic systems.

Skills

Backend systems

Production AI experience

Python

OpenSearch

PostgreSQL

FastAPI

Distributed queues

Tools

OpenSearch

PostgreSQL

FastAPI

Message queues

Job description

Dex is seeking a Senior AI Engineer to own the core agent harness end to end, delivering streaming graph execution and interruptible tool use. You will build end-to-end autonomous agents that can research companies, digest complex documents, and provide verifiable, cited analyses for high-stakes diligence.

You will craft proprietary infrastructure, multimodal retrieval pipelines, and robust evaluation suites to ensure reliability, with close collaboration to founders and PE experts in a