Sourabh Ranjan Kar

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About Me

Sourabh Ranjan Kar

Full Stack Developer

Full Stack Developer with over three years of experience building backend heavy systems in banking and logistics. Strong experience with Java and Spring Boot for REST APIs microservices and event driven workflows. Hands on experience deploying and operating production services on AWS with a focus on performance reliability and secure releases. Actively working on internal tools including LLM assisted features that support analyst workflows in regulated environments.

Frontend

React.js Angular TypeScript JavaScript ES6+ Responsive UI

Backend & Cloud

Java Spring Boot Microservices REST APIs AWS ECS Fargate AWS Lambda API Gateway CloudFormation Docker

Databases

PostgreSQL MySQL Azure SQL MongoDB

Messaging & Eventing

AWS SQS Kafka Event Driven Architecture

Security

Spring Security OAuth2 JWT

AI & LLMs

OpenAI API Prompt Engineering Summarization Classification

Projects

LLM Powered Analyst Assist Tool

Designed an internal LLM powered feature to summarize transaction review cases and highlight key account activity. Improved analyst productivity and consistency while operating within regulated compliance workflows.

Java Spring Boot OpenAI API AWS

Predictive Modeling for Cognitive Health

Built machine learning models using public health datasets to identify cognitive aging patterns. Applied clustering and predictive modeling techniques and visualized insights for healthcare trends.

Python scikit-learn Data Analytics

Experience

Full Stack Developer

Comerica Bank

Oct 2024 Present Remote USA
  • Owned backend services for transaction review and account activity monitoring
  • Improved processing throughput by twenty percent by redesigning service coordination and request flows
  • Built event driven pipelines using AWS SQS reducing timeout failures during peak traffic
  • Optimized RDS queries and indexing reducing execution time for compliance dashboards
  • Designed LLM assisted analyst workflows to summarize transaction cases
  • Deployed containerized services on AWS ECS Fargate and improved release reliability

Full Stack Developer

Blue Dart Express

Jan 2021 Jul 2023 India
  • Built shipment tracking systems supporting international logistics operations
  • Implemented Spring Boot services for shipment status events and routing rules
  • Integrated Kafka and WebSockets for real time tracking updates
  • Optimized Azure SQL performance under peak operational load
  • Improved application security using OAuth2 JWT and role based access control
  • Stabilized releases through unit testing and CI CD automation

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