Java Full Stack Developer • FinTech & Healthcare • AWS Certified

I build the backend fintech runs on.

4+ years building secure, scalable systems across payments and healthcare — Spring Boot microservices, Kafka event pipelines, and GenAI workflows in production.

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About

Systems built to
survive production.

AWS Certified FinTech & Healthcare Cloud Native

I'm Zeel Patel — a Java Full Stack Developer with 4+ years building secure, scalable systems across FinTech and healthcare. I hold a Master's in Computer Software Engineering from Northeastern University and an AWS Solutions Architect certification, and I work day to day in Java, Spring Boot, React, and cloud-native architectures.

At PayPal, I build a GenAI financial intelligence platform that turns raw transaction data into contextual insights, anomaly explanations, and risk intelligence for analysts — LLM and RAG workflows over 80K+ monthly transactions, backed by Spring Boot services and Kafka pipelines that keep analytics near-real-time and PCI DSS compliant.

Monthly Transactions Supported

Events Streamed Daily

Service Availability

Experience

Where I've shipped.

Sep 2024 — Present

Java Full Stack Developer

PayPal, USA

Building a GenAI financial intelligence platform that turns transaction data into insights, anomaly explanations, and risk signals — LLM and RAG workflows over 80K+ monthly transactions, Kafka pipelines processing 75K+ events a day, and Azure-hosted services at 99.5% availability.

JavaSpring BootGenAI / LLMRAGKafkaPostgreSQLAzureKubernetesPCI DSS

Jul 2021 — Aug 2023

Java Full Stack Developer

Infosys, India

Modernized a legacy healthcare payer portal into unified Java services for enrollment, eligibility, benefits, claims, and EOBs — cut latency 12% across 25K+ monthly member sessions, improved MongoDB query performance 17%, and lifted defect detection 24%.

JavaSpring BootMicroservicesReact.jsReduxMongoDBAWS EC2HL7 / FHIR

Stack

Tools I think in.

Frontend

React.js

Redux

TypeScript

JavaScript

Angular

Next.js

HTML5

CSS3

Backend

Core Java

Spring Boot

Spring MVC

Spring Security

Hibernate

Microservices

REST APIs

GraphQL

Cloud & DevOps

AWS

Azure

Docker

Kubernetes

Jenkins

GitHub Actions

Terraform

Kafka

Data & Testing

PostgreSQL

Oracle

MySQL

MongoDB

Redis

JUnit

Mockito

Postman

Projects

What I've built.

AI / Developer Tools

Codaxi — AI-Powered API Docs

Generate interactive API documentation with RAG and vector search. Built for speed, developer experience, and accuracy.

ReactNode.jsMongoDBRAGVector DB

GitHub →

Cloud Infrastructure

AWS File Uploader

A serverless file uploader using AWS S3 for storage and Lambda for event-driven processing.

PythonAWSLambdaS3

GitHub →

AI / NLP

AI Chatbot

An AI chatbot powered by OpenAI with FastAPI backend that answers questions and helps users with queries.

PythonOpenAIFastAPIAI

GitHub →

Database Design

Space Exploration DB

Relational database schema for spacecraft, missions, and telemetry data with full ER diagrams and normalization.

SQLDB DesignER DiagramNormalization

GitHub →

Machine Learning

Movie Recommendation System

Collaborative filtering engine that recommends movies based on viewing history patterns.

PythonMLCollaborative FilteringPandas

GitHub →

Full-Stack Platform

TempAco — Housing Platform

Property search, listings, and agent contacts. Microservices architecture with Spring Security.

JavaSpring BootMicroservicesSpring Security

GitHub →

Machine Learning

US Real Estate Price Prediction

ML model predicting house prices based on features using Scikit-learn and Pandas.

PythonMLPandasScikit-learn

GitHub →

Full-Stack App

Expense Tracker

Real-time collaborative app with WebSocket updates, team features, and progress tracking.

ReactExpressSocket.ioRedis

GitHub →

Data Visualization

Data Analytics Dashboard

Interactive dashboard for complex datasets with real-time updates and customizable D3.js charts.

Vue.jsPythonPostgreSQLD3.js

GitHub →

Education

Where I learned to think.

NEU

Northeastern University

Master of Science in Computer Software Engineering

Boston, MA, USA

GTU

Gujarat Technological University

Bachelor of Engineering in Computer Science Engineering

Ahmedabad, Gujarat, India

I build the backend fintech runs on.

Systems built to
survive production.

Where I've shipped.

Java Full Stack Developer

Java Full Stack Developer

Tools I think in.

AUTOPSY — AI Incident Diagnosis CLI

What I've built.

Where I learned to think.

Northeastern University

Gujarat Technological University

Let's build
something great.

I build the backend fintech runs on.

Systems built tosurvive production.

Where I've shipped.

Java Full Stack Developer

Java Full Stack Developer

Tools I think in.

AUTOPSY — AI Incident Diagnosis CLI

What I've built.

Where I learned to think.

Northeastern University

Gujarat Technological University

Let's buildsomething great.

Systems built to
survive production.

Let's build
something great.