Shahis Khan

About Me

Who I Am

I'm Shahis Khan, a Backend Java Developer and Blockchain Engineer from Pakistan with a deep passion for building robust, scalable software systems. My expertise spans secure REST API development, enterprise-grade Spring Boot applications, and cutting-edge Web3 technologies.

I have worked on real-world projects including a government-level HEC document verification system (Career Key), a multi-chain blockchain wallet application (Dook-Gold), and various full-stack Spring Boot applications.

I believe in writing clean, maintainable code and building software that solves real problems. Open to freelance projects, collaborations, and full-time opportunities.

Projects Built

0.5+

Years Experience

17+

Technologies

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My Work

Projects

Real-world applications and systems I've engineered

⭐ Featured

Career Key

HEC Government Project

BackendGovernment

A government-level document verification system for the Higher Education Commission (HEC) of Pakistan. Enables secure verification of academic credentials with a robust backend — built for security, scalability, and data integrity at institutional scale.

JavaSpring BootSpring SecurityREST APIsMySQLJWT

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⭐ Featured

Dook-Gold

Blockchain Multi-Wallet System

BlockchainWeb3

A sophisticated multi-wallet blockchain system supporting multiple chains. Built with Web3j for Ethereum and Bitcoinj for Bitcoin. Features wallet creation, transaction management, and multi-chain asset tracking with deep cryptographic security.

JavaWeb3jBitcoinjEthereumIPFSSpring Boot

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Blog Application

Full REST API Backend

Backend

Complete blog platform backend with full CRUD for posts, categories, and comments. Implements JWT-based auth, role-based access control, image uploads, and paginated responses — clean RESTful design following industry best practices.

JavaSpring BootJWTMySQLHibernate

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Smart Contact Manager

Full-Stack Contact App

Backend

Full-featured contact management app with user authentication, contact CRUD, search functionality, and a clean dashboard. Users can manage contacts securely with profile management and image uploads using Spring Boot MVC and Thymeleaf.

JavaSpring BootThymeleafMySQLSpring Security

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Nature Daily

Content Platform Backend

Backend

A content-focused platform with a clean, scalable backend architecture. Features content management, user interactions, and category-based organization — designed with performance and extensibility following clean architecture principles.

JavaSpring BootREST APIsMySQL

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Spring Security Demo

JWT & OAuth2 Implementation

Backend

Comprehensive Spring Security implementation with JWT token-based auth, OAuth2 social login, role-based access control, and method-level security. A complete reference for secure Spring Boot application development.

JavaSpring SecurityJWTOAuth2MySQL

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IPFS File Storage

Decentralized Storage System

BlockchainWeb3

Decentralized file storage using IPFS for distributed, tamper-proof storage. Integrated with Ethereum smart contracts for file ownership verification — practical implementation of Web3 storage solutions with Java backend.

JavaIPFSEthereumSmart ContractsWeb3j

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Who I Am

Technologies I Work With

Projects

Career Key

Dook-Gold

Blog Application

Smart Contact Manager

Nature Daily

Spring Security Demo

IPFS File Storage

Contact Me