I'm Hariharan, a Software Engineer building real-world software.

Java 25 + Maven search engine that ingests MySQL, PostgreSQL, HTTP JSON, and filesystem sources into Apache Lucene, then serves low-latency search, lookup, and filter APIs from the index. It also includes MCP tooling and Codex-oriented retrieval flows for agent access to structured data.

Mark II evolution of Vectora: a configuration-driven AI search and chat platform where companies connect databases, REST APIs, and documents through jarvis.yml. It combines Apache Lucene BM25, KNN vector search, OpenAI, JWT role filtering, MCP tools, Docker, and a Next.js TypeScript console.

Job outreach email platform for controlled campaign batches from verified sender accounts. Built as a Next.js and Spring Boot monorepo with signup, admin access, SMTP and SendGrid setup, CSV/XLSX imports, reusable templates, attachments, live preview, delivery tracking, and PostgreSQL-backed dashboards.

Browser-based coding practice lab with 100 questions each for Java, Python, C, C++, PHP, SQL, JavaScript, and Go. It uses React, Vite, Tailwind CSS, Monaco Editor, Wandbox execution, sql.js, localStorage progress tracking, solved counters, streaks, keyboard shortcuts, and an in-browser SQL runner.

Full-stack community platform where users can sign up, join interest-based communities, create and manage posts, participate in threaded discussions, vote on content, and explore personalized and trending feeds with secure auth and modular APIs.

Transportation ERP / TMS platform that manages the logistics lifecycle from customer enquiry to quote approval, dispatch, trip execution, proof of delivery, and invoice generation with JWT auth, role-aware workflow permissions, document uploads, and operations-to-finance controls.

AI-powered e-commerce platform with a Spring Boot backend and React/Vite frontend, combining catalog and order workflows with PGVector-backed retrieval, Spring AI chat support, semantic product search, and AI-assisted product creation using OpenAI and DALL-E.

Server-rendered job portal built with Java and Spring Boot. It supports adding job postings with role, description, experience, and tech stack details, then browsing them through a layered MVC structure with Spring form handling, request mapping, and JSP rendering.

Production logistics platform work at Wehaul Logistics using Java and Spring Boot services, REST APIs, webhook integrations, SQL-backed flows, and cloud-backed storage. Delivered lead ingestion, WhatsApp messaging, live tracking, call masking, and reliability improvements.

Android driver operations app for digitizing the trip lifecycle from onboarding to delivery closure. Built with Kotlin and Firebase, it covers bidding, trip confirmation, geofence-aware status updates, document and POD uploads, live alerts, background location tracking, return-load workflows, and multilingual driver operations.