Open to opportunities

Ayushi Sarkar

@ayushisarkar

Backend-focused software engineer building secure, high-throughput payment and AI-powered platforms with Java and Spring Boot.

Zimbabwe

Message

What I'm looking for

I’m looking for roles where I can build reliable backend services in microservices architectures, improve performance and security, and collaborate with teams that value problem-solving and diverse perspectives while growing through meaningful ownership.

I’m a backend software engineer who builds secure, scalable systems using Java and Spring Boot. At EPAM Systems, I worked with Mastercard on a payment gateway microservices setup—integrating Apple Pay, creating a refund processing module for partial and full refunds, and designing an Async Inquiry service to decouple polling and reduce blocking I/O.

I also supported a legacy-to-modern payment migration using shadow mode (parallel run) to compare request-response pairs and persist validation results for safe cutover. Outside payments, I build an AI-powered career platform (Career Explora) with Spring AI and MongoDB, using CompletableFuture to reduce latency for AI-generated content APIs and deliver role-based assessments and progress tracking.

Experience

Work history, roles, and key accomplishments

Current

Backend Developer (SDE)

Current

EPAM Systems

Jan 2025 - Present (1 year 6 months)

Built and integrated payment microservices, including Apple Pay integration and a refund processing module for partial and full refunds. Designed an async inquiry service for decoupled status polling, supported microservice API development with structured error handling, and contributed to legacy-to-modern shadow mode migration testing and Maven/Spring Boot dependency CVE remediation.

Java Spring Boot PostgreSQL Microservices Refund Processing inquiry handling API Development Error Handling Retry Logic HTTP Response Contracts Correlation IDs Validation Results Persistence Maven

Backend Developer (AI Platform)

Career Explora

Developed backend services for an AI-powered career platform offering skill assessments, mock interviews, and personalized career path recommendations. Implemented concurrent AI service calls to reduce response latency and built APIs for role-based assessments and progress tracking with Spring AI and MongoDB.

Spring Boot Spring AI MongoDB CompletableFuture API Development Role Based Assessment Progress Track React