Python Developer - Agentic AI / GenAI - Investment Banking

GCS Recruitment; Greater London; Hybrid; GBP 111,000 - 166,000; Full time

Job summary

GCS Recruitment is seeking a Python Developer / AI Engineer to join a consulting engagement focused on Agentic AI and Generative AI solutions for an Investment Banking client in London. The role involves hands-on Python engineering, AI agent development, LLM integration, and RAG workflows in a highly regulated environment.

The ideal candidate will bring strong Python skills, experience with OpenAI GPT and Anthropic Claude, and a track record delivering production-grade AI applications within

Qualifications

• Strong Python development experience with production-grade delivery.
• Hands-on Agentic AI / AI Agent development.
• Experience with LLM integrations and Retrieval-Augmented Generation (RAG).
• Familiarity with OpenAI GPT and Anthropic Claude.
• Exposure to LangChain or equivalent tooling for AI workflows.

Responsibilities

• Design and develop production-grade AI solutions for an Investment Banking client.
• Build Python-based AI applications, agentic workflows, LLM integrations and RAG solutions in a regulated enterprise.
• Collaborate within a consulting team to deliver client-ready outputs.

Skills

Python development

Agentic AI

LLMs/GenAI

RAG

OpenAI/GPT

Anthropic Claude

LangChain

LangGraph

AutoGen

CrewAI

FastAPI

AI orchestration

Investment Banking

Stakeholder comms

Tools

N/A

Job description

Python Developer - Agentic AI / GenAI - Investment Banking

London, Farringdon | Hybrid | Inside IR35 | Contract

We are looking for a highly experienced Python Developer / AI Engineer to join a consulting engagement delivering Agentic AI and Generative AI solutions within an Investment Banking environment.

This is a hands‑on development role requiring strong Python engineering alongside proven commercial experience building Agentic AI, LLM and RAG solutions.

Key Skills

• Strong commercial Python development
• Hands‑on Agentic AI / AI Agent development
• LLMs / Generative AI
• RAG (Retrieval-Augmented Generation)
• OpenAI / GPT
• Anthropic Claude
• LangChain, LangGraph, AutoGen, CrewAI or similar
• FastAPI / API development
• AI orchestration, tool calling and guardrails
• Strong Investment Banking / Capital Markets experience
• Excellent communication and stakeholder‑facing skills

The Role

You will work within a consulting team designing and developing production‑grade AI solutions for an Investment Banking client.

The work will involve building Python‑based AI applications, agentic workflows, LLM integrations and RAG solutions within a highly regulated enterprise environment.

Contract Details

• Location: London, Farringdon
• Working model: Hybrid
• IR35: Inside IR35
• Sector: Investment Banking / Capital Markets
• Contract: Initial contract with potential extension

Previous Investment Banking experience is essential.