Professional Projects
EV Charging Management System (CMS)
A full-stack, production-grade EV charging platform built from scratch — managing partners, charging stations, real-time OCPP communication, billing, tariffs, and end customer wallets. Deployed and live at evtechs.in.
- ✔️ Real-time charger monitoring with auto-refresh live status board
- ✔️ Remote OCPP 1.6 operations — Start/Stop, Reset, Trigger, Unlock, Get Config
- ✔️ Full OCPP message log viewer with filter by charger, action & date range
- ✔️ Multi-partner architecture with stations, connectors, and credential management
- ✔️ B2C tariff engine with global and custom tariff scopes
- ✔️ End customer wallet — credits, debits, session history & invoices
- ✔️ OCPI Network Board for EV roaming setup (Platform → Role → Connection → Modules)
- ✔️ Business dashboard with session/revenue trend charts and operational alerts
- ✔️ EV & Charger OEM catalogue with vehicle and manufacturer management
Tech Stack: Java, Spring Boot, OCPP 1.6, OCPI 2.2.1, WebSocket, MySQL, MongoDB, jQuery, Bootstrap, REST APIs, JavaMail, SMS Gateway
🔗 Open Live CMS🔐 Email or message me for demo credentials
📊 Dashboard & Analytics
🔌 Charging Stations & Chargers
⚡ Real-Time Monitoring & OCPP Operations
📋 Charging Sessions & Logs
💰 Tariffs, Partners & Customers
🚗 OEMs, OCPI & Simulator
🏢 Volttic Live in Production
The following systems were built during my time at Volttic and are live in production. Details are shared at a high level out of respect for confidentiality obligations. 🔒 Specific implementation details, business logic, and internal architecture are kept confidential per NDA.
B2B Billing System
Designed and developed a web-based billing platform to manage B2B accounts for EV charging infrastructure. The system handled automated billing cycles, payment tracking, and account management for charging operators.
- ✔️ Automated billing and account lifecycle management
- ✔️ Real-time usage tracking and financial controls
- ✔️ Multi-channel communication for billing events
Tech Stack: Java, MySQL, MongoDB, jQuery, Bootstrap, JavaMail, SMS API
OCPI 2.2.1 Protocol Integration
Implemented the Open Charge Point Interface (OCPI 2.2.1) standard to enable EV roaming between charging networks. Built a spec-compliant, role-aware integration layer supporting multiple OCPI roles and modules.
- ✔️ Compliant with the public OCPI 2.2.1 specification
- ✔️ Supports multiple operator roles (CPO, EMSP, Hub, etc.)
- ✔️ Modular integration framework for cross-network interoperability
Tech Stack: Java, J2EE, MySQL, MongoDB, jQuery, Bootstrap
OCPP 1.6 Implementation
Built a real-time communication system between EV chargers and the central server using the OCPP 1.6 protocol over WebSocket. Covered core and advanced profiles as defined in the public specification.
- ✔️ Compliant with OCPP 1.6 Core & Smart Charging profiles
- ✔️ Remote charger monitoring and control
- ✔️ Real-time event handling and session management
Tech Stack: Java, Spring Boot, WebSocket, MySQL, MongoDB
Telematics-Based Smart Charging Insights
Integrated telematics data from EVs to generate smart charging recommendations and behavioral insights for drivers and operators. Involved real-time data processing, location tracking, and proactive alerting.
- ✔️ Real-time vehicle telemetry processing
- ✔️ Data-driven charging recommendations
- ✔️ Multi-channel alert delivery and visualization
Tech Stack: Java, WebSocket, MongoDB, MySQL, Google Maps, Chart.js, JavaMail, SMS API
Notification System
Built a centralized notification service to deliver real-time alerts across multiple channels to EV operators, drivers, and system stakeholders.
- ✔️ Multi-channel delivery: Email, SMS, Push
- ✔️ Trigger-based and scheduled notification support
- ✔️ Designed as a pluggable microservice
Tech Stack: Java, REST APIs, JavaMail, SMS Gateway
EV Charging Simulator
Developed a desktop-based simulator to emulate EV charger behaviour for testing and development purposes, communicating with the central server over OCPP 1.6 WebSocket.
- ✔️ Multi-charger simulation with concurrent connections
- ✔️ Useful for load testing and OCPP protocol validation
- ✔️ Fully standalone desktop application
Tech Stack: Java, AWT/Swing, WebSocket, Multithreading
Personal Projects
🌐 Web Server in C (Multithreaded)
A custom-built HTTP 1.1 server written in C. Fast, lightweight, configurable, and supports multiple instances.
🕹️ Highrise VR Game Bot (Node.js)
A Node.js-based automation bot for the virtual reality social game Highrise. The bot interacts with room guests—welcoming them, dancing, chatting, teleporting, and responding to predefined commands. It also supports developer commands that let you dynamically control and modify its behavior in real time.
🧩 Generic Client-Server Programming Framework
A reusable Java framework that allows developers to build multi-client and multi-server systems without writing raw socket code. It abstracts the underlying complexity of socket communication, providing a modular and scalable interface for client-server interactions. Ideal for real-time applications, simulation environments, or testing protocols.
📚 Library Automation System (Java Desktop App)
A desktop-based Java application designed to manage library operations. Currently, it includes the complete Author module with full CRUD (Create, Read, Update, Delete) functionality. Planned modules include Books, Members, and Transactions. The application also supports generating PDF reports of authors using the iText PDF library.
📁 Generic Data Structures Library in C
A modular, memory-safe, and reusable data structure library written in C. Supports generic types using void* and includes core modules like stack, queue, linked lists, BST, and heap. Designed with iterator support, modular structure, and CMake build system. Ideal for learning and real-world use in C projects.
Package Delivery System
A Java console application that calculates delivery costs and estimates delivery times for packages using a fleet of vehicles. This repo contains a small but complete implementation (pricing, coupon rules, scheduling) built as a coding challenge. It emphasizes correct arithmetic (BigDecimal), modular design, unit testing, and reproducible CLI usage.
📁 FTP Application (Java)
A robust FTP server and client application built in Java to handle large file transfers across systems. It supports multi-threaded upload/download sessions, file queuing, and integrity checks. Designed for performance and reliability, this tool simplifies file distribution in enterprise environments and custom networks.
🔐 Captcha Engine (Java)
A lightweight, flexible captcha generator for Java web apps. Easily pluggable, with smooth integration and customization support.
🔧 REST API Tool (Python)
A RESTful API tool using Python that supports all core HTTP methods (GET, POST, PUT, DELETE). Built with a clean structure for creating lightweight web services.