AI-Powered Cross-Sell Intelligence & Business Analytics on AWS Turning Customer Transactions into...AI-Powered Cross-Sell Intelligence & Business Analytics on AWS Turning Customer Transactions into...
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AI-Powered Cross-Sell Intelligence & Business Analytics on AWS
Turning Customer Transactions into Cross-Sell Opportunities and AI-Powered Insights
Designed an AWS-based cross-selling intelligence solution for a banking use case that combined transaction analytics, executive dashboards, vector search and generative AI to help identify customers with untapped product opportunities, money moving to competing institutions, idle funds and other revenue-leakage patterns.
The real business problem
The project was built around a real banking cross-selling problem.
The objective was not simply to build a chatbot or dashboard. The bank wanted to understand where existing customers were using competing financial products or where their transaction behaviour indicated an opportunity for another product.
Examples included identifying customers who:
regularly transferred significant funds to other banks
appeared to maintain important financial relationships outside the bank
had direct-debit mandates going to competing institutions
had children-related transactions but no corresponding kids account with the bank
kept substantial funds idle instead of using investment or wealth-management products
appeared to maintain relationships with external fund managers
showed transaction patterns that could indicate an appropriate additional banking product
The central question was:
How can existing customer transaction data be turned into specific, explainable cross-selling opportunities?
What I worked on
I worked on the design of a data and AI solution that brought together:
transaction processing + customer analytics + cross-sell rules + GenAI + semantic retrieval + executive visualization
The solution processed customer transaction data, identified behaviours relevant to predefined cross-selling scenarios and prepared those insights for both analytical dashboards and AI-assisted exploration.
Data used in the project
We used anonymised and PII redacted banking transaction data rather than exposing real customer financial information.
Cross-sell intelligence layer
The project wasn't simply asking an LLM to "find opportunities."
The underlying transaction data was first processed and analysed so that specific business signals could be identified.
For example:
External-bank leakage
A customer repeatedly transferring substantial amounts to another bank could indicate that the customer maintains an important banking relationship elsewhere.
Potential action:
relationship-manager follow-up or targeted account/product engagement
Idle funds
A customer maintaining a large balance without deploying those funds into relevant investment products could represent a wealth or investment opportunity.
Potential action:
investment, fixed-income or wealth-management offer
Children's banking opportunity
Transactions associated with school fees, children's services or similar behavioural indicators could be combined with existing customer-product information.
If the customer had no children's account with the bank, the system could flag a potential opportunity.
Potential action:
kids/children's account recommendation
External fund-management relationship
Patterns suggesting payments to external investment or fund-management providers could reveal investment assets being managed outside the bank.
Potential action:
wealth-management or investment-product engagement
Direct-debit leakage
Recurring mandates involving external financial providers could reveal products or services that the customer currently obtains elsewhere.
Potential action:
identify an equivalent or complementary product that the bank can offer
AWS architecture
The architecture was designed approximately as:
Transaction Sources
↓ Amazon API Gateway
↓ Amazon S3 — Raw Data
↓ AWS Glue
↓ AWS Lambda — Transformation / Business Logic
↓ Amazon S3 — Curated Data
From the curated layer, the solution branches.
Analytics path
Curated Data → Amazon Redshift Serverless → Amazon QuickSight
This supports dashboards showing customer behaviour, cross-sell opportunities, transaction patterns and executive-level insights.
AI / RAG path
Curated Data → Amazon Bedrock → Embeddings → Amazon OpenSearch Service
Relevant enterprise/customer context can then be retrieved through semantic search and supplied to the foundation model.
Conceptually:
Amazon Bedrock ⇄ Amazon OpenSearch Service
This enables grounded AI responses rather than relying solely on the foundation model's general knowledge.
What the GenAI component adds
The dashboard answers questions such as:
How many cross-selling opportunities have been identified?
Which opportunity categories are most common?
Which customer segments show the highest leakage?
Where are the largest potential opportunities?
The GenAI layer goes further by allowing the user to investigate the data conversationally.
For example:
“Which customers show evidence of significant funds leaving for competing banks?”
or
“Explain why this customer was identified as an investment opportunity.”
or
“What cross-selling opportunities should relationship managers prioritize based on these transaction patterns?”
The RAG component provides relevant business context to the model so that responses can be grounded in the underlying enterprise information.
Executive analytics component
Amazon QuickSight provides the structured analytical side of the solution.
The dashboard layer can surface metrics such as:
Total customers analysed
Cross-sell opportunities identified
Opportunity type
Estimated customer value
Transaction leakage patterns
Customer/product relationships
Trend over time
Opportunity distribution
Customers requiring relationship-manager attention
This means executives get a high-level picture while business users can investigate specific opportunities in greater depth.
My role
AI & Data Solutions Engineer
My work involved translating the cross-selling business problem into an implementable AWS data and AI architecture.
This included working across:
business requirements
cross-selling use cases validation
data gap analysis
transaction-data ETL & design
data transformation
analytics architecture
Generative AI
vector-search architecture
Amazon QuickSight
business insight presentation
Technologies
Amazon Bedrock • Amazon OpenSearch Service • Amazon S3 • AWS Glue • AWS Lambda • Amazon API Gateway • Amazon Redshift Serverless • Amazon QuickSight • Python • SQL • Generative AI • RAG • Vector Search • Data Engineering • Business Intelligence
Project outcome
The project demonstrated how a bank could move from simply storing customer transaction data to actively using that information to uncover cross-selling and revenue-retention opportunities.
Transactions → Behavioural Signals → Cross-Sell Opportunities → Analytics → AI-Assisted Exploration → Business Action
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