Case Studies | FinTech

Grounding AI answers in enterprise data

PoC - Bedrock RAG Application

About

A FinTech business working with Cloud Combinator on AWS. The client is anonymised at their request.

Challenge

The challenge had three focus areas that the proof of concept needed to address.

Dependency on third-party platforms

The client wanted to reduce reliance on external LLM providers and bring the capability in-house on AWS, giving them control over how it is built, secured and scaled.

Enterprise-level security

As a financial services platform, the client needed the AI to operate within a secure AWS environment, with controlled access to data through IAM roles and policies rather than open exposure.

Accurate, grounded answers

Generic model output was not enough. The application had to base its responses on the client's own knowledge base, retrieving the most relevant information for each query so answers were contextual and trustworthy.

Solution

The client's documents are stored in an Amazon S3 knowledge base with controlled IAM access, and indexed into an Amazon OpenSearch Service vector database so that relevant content can be found by similarity search. When an user asks a question through the web application, the request is routed via Amazon API Gateway to an AWS Lambda function that orchestrates the workflow.

RAG

Retrieval-augmented generation grounded in the client's own data

4

Build stages from knowledge base to response generation

100%

Serverless orchestration on AWS Lambda

By the numbers:

  • RAG - Retrieval-augmented generation grounded in the client's own data
  • 4 - Build stages from knowledge base to response generation
  • 100% - Serverless orchestration on AWS Lambda
Changes

Cloud Combinator delivered a functional, secure LLM application built on Amazon Bedrock, demonstrating that the client can generate grounded insight from their own data within AWS's secure environment and reduce their dependency on external platforms.

  • In-house AIThe client now has a LLM application running on their own AWS infrastructure, reducing dependency on third-party platforms.
  • Grounded responsesRetrieval-augmented generation bases answers on the client's knowledge base, so output is contextual and relevant rather than generic.
  • Secure by designData access is controlled through IAM roles and policies, keeping the solution aligned with enterprise-level security needs.
  • Serverless and scalableAn API Gateway, Lambda and Bedrock architecture handles requests without managing servers and scales with demand.
  • HandoverCloud Combinator delivered the working application with a demonstration and knowledge transfer so the client's developers could continue building on it.

With the RAG application proven, the natural next step (projected) is to integrate it fully into the client's product front end and extend the knowledge base across more of their data, building on the secure foundation delivered in the proof of concept.

AWS Stack

Amazon Bedrock

For foundation-model response generation and embeddings in the RAG workflow.

Amazon OpenSearch Service

As the vector database for efficient similarity retrieval.

AWS Lambda

For serverless orchestration of query processing and response generation.

Amazon S3

For secure, scalable knowledge base storage.

Amazon API Gateway

For managing and routing requests from the web application.

AWS IAM

For controlled, least-privilege access to data and services.

YOU MIGHT LIKE

Related success stories

View all case studies

Case Studies | Insights

Utilising Language Recognition, Speed, and Enhanced Security to Make Social Media a Force for Good

  • Here, we take a detailed look at how the Cloud Combinator team collaborated with another cutting-edge AI service provider that provides intelligent systems to “make social media more social” for brands and users alike.
  • Arwen AI is a UK-based startup specialising in AI solutions to manage and enhance brands’ social media interactions. Founded in 2020 by Matt McGrory, Dr. David Cole, and Joel Bailey, Arwen. AI focuses on using AI to automatically detect and remove spam, toxic comments, and other unwanted content from social media platforms.
  • The team at Arwen have three core products. ‘Moderate’ is focused on identifying and removing toxic content from social media channels. ‘Engage’ helps brands identify and engage with meaningful conversations on social media, and ‘Customize’ allows brands to apply bespoke algorithms to their channels - creating an even more effective moderation and engagement.
Read more
CONTACT US

Ready to turn AI into impact?

We'll help you spot the highest-value opportunities, reduce risk around your first AI initiative, and define a clear path to results from day one.

Why talk to us:

Outcome-driven recommendations

AWS-recognised delivery expertise

Risk-aware AI adoption

Clear next step, not a sales pitch

Start with a focused 20-minute conversation about your goals — no pressure, no commitment.

This website uses cookies to enhance user experience and to analyze performance and traffic on our website.

See our Privacy Policy for details.