HANISHA PATCHINEELAM
Chicago,IL
Summary
Senior Java Backend Engineer with 6+ years of experience building highly scalable, event-driven microservices using Java (8-21), Spring Boot, Kafka, AWS, and OpenShift. Strong expertise in distributed systems, cloud deployments, CI/CD, observability and frontend experience with React and Angular.
Overview
9
9
years of professional experience
Work History
Application Engineer
Discover Financial Services
Chicago, IL
02.2024 - Current
- Built microservices using Java 21 + Spring Boot for chargeback and arbitration workflows.
- Improved multinregion resiliency across OpenShift clusters; reduced downtime risks.
- Automated dispute workflows, reducing manual processing by 30%.
- Enhanced observability through Datadog + Kibana dashboards, reducing MTTR.
- Secured APIs with JWT Vault onboarding; maintained 80%+ code coverage.
Senior Web Developer
FIS Global
Remote
06.2023 - 01.2024
- Delivered Java + Spring Boot services supporting millions of financial transactions.
- Improved MySQL performance by 25% and increased throughput by 30%.
- Created React dashboards and automated CI/CD, reducing release cycles to 5 days.
Backend Engineer
OCC
Chicago, IL
12.2022 - 05.2023
- Built Kafka-based microservices processing millions of trades/day.
- Deployed Java services on AWS ECS/EC2 with 99.99% uptime.
- Improved settlement throughput by 30% via SQL/Hibernate tuning.
Backend Developer
Costco Logistics
Chicago, IL
04.2021 - 11.2022
- Built Spring Boot microservices + React dashboards improving nationwide delivery visibility.
- Migrated logistics data to Cassandra/Cosmos DB; improved scalability.
- Created batch pipelines reducing sync errors by 90%.
Full Stack Engineer
Centene Corporation
Tampa, FL
06.2020 - 04.2021
- Developed Angular 8 micronfrontend modules improving load time by 30%.
- Built Spring Boot APIs reducing manual claims lookup by 40%.
- Improved MySQL/MongoDB performance via optimized queries.
Java Developer
Tech Mahindra
Hyderabad, India
06.2017 - 05.2018
- Built Spring REST APIs & batch jobs improving billing throughput by 30%.
- Reduced nightly batch windows by 20%.
Education
Masters - Computer Science
University of New Haven
Connecticut05-2020
Bachelors - Computer Science
St. Francis College For Women
05-2017
Skills
Backend: Java 8–21, Spring Boot, Spring Cloud, REST, Microservices
Messaging: Kafka, JMS
Cloud & Platforms: AWS (EC2, S3, RDS, SQS, Lambda, ECS), OpenShift (OCP), Docker, Kubernetes
Frontend: React, Angular, TypeScript, JavaScript
Databases: PostgreSQL, Oracle, MySQL, MongoDB, Cassandra/Cosmos DB
Monitoring: Datadog, Kibana, Splunk, Grafana, Dynatrace
Testing: JUnit, Mockito, Contract Testing, Selenium, JMeter
Tools: Git, Maven, Gradle, Jenkins/Trident, Bitbucket
Timeline
Application Engineer
Discover Financial Services
02.2024 - Current
Senior Web Developer
FIS Global
06.2023 - 01.2024
Backend Engineer
OCC
12.2022 - 05.2023
Backend Developer
Costco Logistics
04.2021 - 11.2022
Full Stack Engineer
Centene Corporation
06.2020 - 04.2021
Java Developer
Tech Mahindra
06.2017 - 05.2018
Masters - Computer Science
University of New Haven
Bachelors - Computer Science
St. Francis College For Women