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Abir Kumar Das

@abirkumardas

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Lead Backend Engineer at Oracle Cloud Infrastructure who built AI-assisted workflows and validated LLM responses.

India

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At Oracle Cloud Infrastructure, I developed Java 17 and Spring Boot services for automated test-suite generation and related workflows, from data-context discovery through reporting and deployment.

I built AI-assisted engineering workflows with Python, LangChain, and Spring Boot to help discover data context, interpret logs, and restructure integration-test flows. I also implemented LLM response validation using Relevancy-Evaluator and Fact-Checking-Evaluator frameworks.

Before that, I developed backend services for enterprise healthcare applications at Cerner Healthcare and GE Healthcare. My work has included resolving concurrency and data-integrity issues, addressing security findings, and mentoring junior developers.

Experience

Work history, roles, and key accomplishments

Senior Member of Technical Staff

Oracle Cloud Infrastructure

Feb 2022 - Oct 2026 (4 years 8 months)

Developed and enhanced Java 17 and Spring Boot services for automated test-suite generation and related workflows. Built AI-assisted engineering workflows using Python, LangChain, and Spring Boot, and implemented LLM response validation.

Java 17 Spring Boot Python Lang Chain Spring AI LLM Integrations JUnit5 Mockito Oracle Database Optimistic Locking Concurrency Data Integrity RESTful Micro Services YAML OpenTelemetry

Senior Software Engineer

Cerner Healthcare

Nov 2018 - Feb 2022 (3 years 3 months)

Developed and maintained Java and Spring Boot backend services for enterprise healthcare applications. Delivered enhancements and defect fixes, and addressed security findings using Fortify, OWASP Dependency-Check, and OWASP ZAP.

Java Spring Boot RESTful Micro Services Fortify OWASP Dependency Check OWASP ZAP Security Root Cause Analysis

Software Engineer

GE Healthcare

May 2014 - Nov 2018 (4 years 6 months)

Developed and maintained Java- and JavaScript-based healthcare applications supporting clinical and business workflows. Worked with Sybase databases and stored procedures for transactional functionality.

Java JavaScript Sybase Stored Procedures Transaction Management

Mobile Applications Developer

Foofys Solution and Tagtual Technology

Jan 2013 - May 2014 (1 year 4 months)

Developed mobile applications for Android and Windows Phone using Java, SQLite, and PhoneGap. Integrated application features with HTTP and JSON-based services.

Android Windows Phone Java SQLite PhoneGap HTTP JSON