I am a Senior Software Engineer, educator, and coding instructor with 27+ years of software engineering experience and 21+ years of teaching experience.

Since 1999, I have worked on software development and engineering projects across different technologies and domains. Since 2005, I have also been teaching and mentoring developers and learners through practical, project-based programming education.

My goal is to make complex programming concepts easier to understand by combining real-world engineering experience, clear explanations, practical examples, and hands-on projects.

I am particularly interested in helping students and developers learn:

• Programming Fundamentals
• Python Programming
• Web Development
• Backend Development
• Full-Stack Development
• JavaScript / TypeScript
• Software Engineering Principles
• Object-Oriented Programming
• APIs and Web Services
• Database Fundamentals
• Git & GitHub
• Problem Solving and Debugging

I also teach more specialized topics for learners interested in blockchain and Web3:

• Solidity
• Smart Contract Development
• Smart Contract Security
• DeFi Architecture
• Web3 Development
• Foundry / Hardhat

My teaching approach is not limited to syntax. I focus on helping learners understand how and why software works, how to structure projects, how to debug problems, and how to turn concepts into working applications.

I have been teaching programming and software engineering since 2005, working with students and developers at different levels.

My teaching philosophy is:

Learn the concept → understand the implementation → build a project → review the code → improve the solution.

I believe that experienced developers can learn faster when theory is connected to real code and practical engineering decisions.

I use GitHub projects, examples, exercises, technical notes, and real-world scenarios as part of my learning materials.

My software engineering career began in January 1999.

Over more than 27 years, I have worked with a broad range of programming technologies and software development concepts, including application architecture, backend development, web development, databases, APIs, distributed systems, and blockchain engineering.

This repository is therefore not only a collection of code. It is also a public portfolio of teaching materials, practical examples, experiments, and engineering projects.

• Python
• JavaScript
• TypeScript
• Rust
• Solidity
• Go
• HTML / CSS
• SQL

• Web Development
• REST APIs
• Backend Development
• Node.js
• Express.js
• React
• Next.js
• Database Integration
• Web3 Integration

• Git
• GitHub
• Foundry
• Hardhat
• Ethers.js
• Web3.js

Some repositories are specifically useful as learning resources and practical programming examples.

A structured collection of Rust examples covering fundamentals and progressively more advanced concepts, including data types, control flow, tuples, closures, generics, structs, vectors, borrowing, lifetimes, traits, error handling, concurrency, file management, serialization, databases, and a mini project.

Repository: https://github.com/dappteacher/rust-examples

A collection of Solidity design-pattern examples covering topics such as ERC-20, ERC-721, ERC-1155, factories, DAOs, wallets, auctions, randomness, Uniswap-style patterns, and other practical smart-contract examples.

Repository: https://github.com/dappteacher/solidity-design-patterns

Practical examples of Solidity vulnerabilities and attack scenarios designed to help developers understand how security issues happen, how they can be detected, and how they can be mitigated.

Repository: https://github.com/dappteacher/solidity-security-scenarios

A collection of Solidity smart-contract examples covering different use cases and reusable implementation ideas for developers who want to learn through practical code.

Repository: https://github.com/dappteacher/solidity-projects-examples

A web development project demonstrating application development outside the blockchain ecosystem.

Repository: https://github.com/dappteacher/URL-shortener

A practical full-stack-style project combining Solidity smart contracts with a web frontend and Web3 integration. It demonstrates how frontend applications can communicate with blockchain-based backend logic.

Repository: https://github.com/dappteacher/voting-dapp

Blockchain is one of my specialized areas rather than the limit of my teaching scope.

I have extensive practical experience with:

• Solidity
• Smart Contract Security
• DeFi Protocol Architecture
• DApp Architecture
• Gas Optimization
• Foundry
• Hardhat
• Ethereum / EVM
• Solana / Rust
• Tokenization
• Account Abstraction
• Protocol Design

Selected work includes smart contract security labs, DeFi projects, tokenization projects, auditing research, and blockchain engineering notes.

I also maintain repositories for studying software and smart-contract security through practical examples.

My security work focuses on:

• Access Control
• Reentrancy
• Logic Flaws
• Oracle Manipulation
• Flash-Loan Risks
• Economic Vulnerabilities
• Upgradeability Risks
• Centralization Risks
• Attack Surface Analysis
• Gas and Architecture Optimization

I publish technical notes and practical engineering articles covering software and blockchain engineering.

My goal is to turn engineering experience into useful learning material for developers, students, and technical professionals.

Repository: https://github.com/dappteacher/blockchain-engineering-notes

I want to help students and developers move from:

"I know the syntax."

to:

"I understand the concept, I can build it, I can debug it, and I understand why it works."

Whether you are starting with programming, learning Python or Web Development, improving your software-engineering skills, or moving into advanced blockchain development, I focus on practical learning and real code.

I am open to:

• Coding instruction
• Programming mentoring
• One-to-one tutoring
• Project-based learning
• Code reviews
• Technical mentoring
• Software engineering guidance
• Web Development and Python education
• Advanced Solidity / Web3 education

This GitHub profile contains a mixture of:

• Teaching examples
• Programming exercises
• Web development projects
• Software engineering experiments
• Blockchain projects
• Security research
• Technical notes

I continuously improve these repositories to make them more useful as practical learning resources.

LinkedIn: https://www.linkedin.com/in/dappteacher/

GitHub: https://github.com/dappteacher