GenAI Full-Stack Engineer — Build POCs & Scale Solutions

Capgemini; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Hybrid working

Flexible benefits

Job summary

Capgemini Invent is seeking a GenAI-focused full-stack developer to build and scale GenAI POCs into production-grade applications. You will design and implement backend microservices in Python (FastAPI) or TS (Express), craft responsive UIs in React/TypeScript, and leverage LangChain ecosystems to empower clients with AI-driven capabilities.

You will also work on cloud hosting (AWS/Azure), containers (Docker/Kubernetes), and IaC (Terraform), while mentoring teammates and shaping delivery

Qualifications

• Experience building GenAI full-stack applications and POCs.
• Strong backend and frontend development with microservices.
• Hands-on with LLMs and GenAI tooling (LangChain, Ollama).

Responsibilities

• Collaborate with the team to develop GenAI proof-of-concepts (POCs) for clients.
• Scale existing POCs to production-ready solutions for customer use.
• Design and develop FullStack applications for GenAI and non-GenAI projects.
• Support infrastructure to enable robust end-to-end solutions.
• Mentor team members and contribute to practice growth.

Skills

Python FastAPI

TypeScript Express

React TypeScript

Next.js

LangChain

LangGraph

CrewAI

Vercel AI

OpenAI

Anthropic

Mistral

Llama

Ollama

AWS

Azure

Docker

Kubernetes

Terraform

Langsmith

Langfuse

Git

GitHub

GitLab

Jenkins

PostgreSQL

MongoDB

ChromaDB

Pinecone

PGVector

Qdrant

NoSQL

SQL

Education

Bachelors or Masters in CS/SE

Tools

Virtual Machines

Job description

Capgemini Invent is seeking a GenAI-focused full-stack developer to build and scale GenAI POCs into production-grade applications. You will design and implement backend microservices in Python (FastAPI) or TS (Express), craft responsive UIs in React/TypeScript, and leverage LangChain ecosystems to empower clients with AI-driven capabilities.

You will also work on cloud hosting (AWS/Azure), containers (Docker/Kubernetes), and IaC (Terraform), while mentoring teammates and shaping delivery