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Ashish Kumar

@ashishkumar79

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Backend Software Engineer at PayPal who cut contact search availability from minutes to under 2 seconds.

India

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At PayPal, I led the architecture and delivery of a Kafka- and Juno-based contact-sync flow that made newly synced contacts searchable within 2 seconds. I also mentored three engineers through implementation and production rollout.

I built the create, update, and close lifecycle for PayPal Pools using Java, GraphQL, and microservices. I designed idempotent payment flows and distributed locking to prevent duplicate transactions and enforce contribution limits.

At PayPal, I migrated 20+ REST APIs to a partitioned data architecture using dual writes and feature-flagged rollout controls. Earlier, at HCL Software and Amdocs, I built Java backend APIs for InformixHQ and enterprise billing platforms.

Experience

Work history, roles, and key accomplishments

Current

Software Development Engineer 2

Current

PayPal

Dec 2021 - Present (4 years 10 months)

Led architecture and delivery of a Kafka-based contact-sync data flow, reducing search availability time from minutes to under 2 seconds. Built PayPal Pools lifecycle, migrated CI/CD from Jenkins to Harness, and led backend data partitioning across 20+ REST APIs.

Java Spring Boot Kafka GraphQL Microservices Distributed Locking CI CD Jenkins Harness AWS MySQL Oracle REST APIs System Design Mentorship

Software Engineer

HCL Software

Mar 2019 - Dec 2021 (2 years 9 months)

Built and enhanced Java 8 REST APIs on Jetty for InformixHQ, enabling customers to monitor database health and performance. Partnered with clients to translate requirements into backend solutions and owned full lifecycle from design to production support.

Java 8 REST APIs Jetty Informix Database Monitoring Requirements Analysis Troubleshooting

Backend Lead

The OrangeCup

Oct 2020 - Aug 2021 (10 months)

Designed and built the Java/Spring Boot backend for a platform connecting brands with influencers. Led three developers through MVP delivery and owned AWS deployment, monitoring, and DevOps operations.

Java Spring Boot AWS DevOps Leadership MVP Development

Software Engineering Associate

Amdocs

Jul 2017 - Mar 2019 (1 year 8 months)

Built backend APIs using Java, Spring Boot, and C for Ensemble APILINK, integrating frontend and enterprise systems. Delivered features for Accounts Receivable, Billing, and Customer Service Management for Sprint's billing platform.

Java Spring Boot C REST APIs Billing Systems Accounts Receivable Customer service management

Engineering Intern

NVIDIA

Jan 2017 - Jun 2017 (5 months)

Improved the reliability of Veracity, a C/C++ automated test framework, by diagnosing and resolving defects. Simplified debugging and test maintenance, contributing to more stable automated testing.

C C++Testing Automation Debugging Test Framework