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Raj Kumar

@rajkumar38

Full Stack Developer at Merchant Nation building AI-driven conversational platforms with LLMs, RAG, and workflow automation.

India

Message

At Merchant Nation, I design and help build AI-driven conversational platforms using LLMs, RAG architectures, and workflow automation. I also develop multilingual systems that combine retrieval pipelines and knowledge-base orchestration to deliver context-aware responses.

At Plexora, I architected a real-time analytics platform used by 150+ restaurants and an AI-powered assistant for querying business metrics. Earlier, at Andhra Pradesh Technology Services, I modernized vehicle management systems for cloud-native architectures and engineered secure CI/CD pipelines; outside work, I’ve secured 30+ vulnerabilities through coordinated bug bounty programs.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Developer

Current

Merchant Nation

Oct 2025 - Present (1 year)

Designed and built scalable AI-driven conversational platforms using LLMs, RAG architectures, and workflow automation. Developed multilingual AI systems, backend integrations, and cloud-based AI infrastructures with security and observability.

LLM RAG Prompt Engineering Backend Integrations APIs CRM Payment Systems Webhooks Cloud Infrastructure Security Monitoring Logging Analytics Authentication Access Control Cross Functional Collaboration

Founding Engineer

Plexora

Feb 2025 - Sep 2025 (7 months)

Architected a real-time analytics platform using React, Node.js, and PostgreSQL, delivering dashboards for 150+ restaurants. Engineered an AI-powered BI assistant with LLM capabilities, reducing manual analysis time by 50%.

React NodeJS PostgreSQL LLM AWS Docker CI CD Data Visualization Predictive Analytics Inventory Management

Full Stack Developer

Andhra Pradesh Technology Services

Jul 2023 - Nov 2024 (1 year 4 months)

Modernized legacy C++ and .NET systems by migrating workloads to cloud-native architectures on Microsoft Azure. Engineered secure CI/CD pipelines and integrated DevSecOps practices, including static code analysis and vulnerability scanning.

C++.NET Azure Azure DevOps Docker CI CD DevSecOps SQL Azure SQL Oracle Cloud Secure Coding Workshops

Software Engineering Intern

Octazen

Jul 2022 - Dec 2022 (5 months)

Helped create a cloud file synchronization engine supporting AWS S3, Azure Blob Storage, and Google Drive. Developed React UI components and REST APIs, and contributed to test scripts and QA cycles, reducing sync-related bugs by 30%.