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Building from First Principles

Architecting
On-Chain Systems.

I am Harsh. I focus on learning smart contract development by building financial logic and decentralized systems from scratch.

Explore Projects GitHub
[ 01 ]

Portfolio Overview

I’ve been focusing on learning smart contract development by building different on-chain systems from the ground up. Instead of just reading documentation, I try to understand how financial logic works on Ethereum by implementing contracts myself and connecting them with simple frontends.

My ultimate goal is to become a strong smart contract developer who understands contract architecture, security, and how decentralized systems actually work in production. I want to contribute to serious blockchain infrastructure and DeFi projects.

[ 02 ]

Project Index

IDENTITY // STATE MANAGEMENT

OnChain Reputation System

A smart contract system where users can register and earn reputation points on-chain. The contract tracks activity and assigns reputation tiers based on accumulated points. Built to deeply understand user state management, mappings, structs, and frontend integration.

Solidity Mappings & Structs Frontend Integration
View Repository →
On-Chain Data Storage
Tiered Reputation Logic
struct User {
  uint256 reputation;
  bool isRegistered;
}
mapping(address => User) public users;
DEAL LIFECYCLE // FINANCE

Escrow Contract

A decentralized escrow allowing two parties to securely transact. Funds are locked until both sides complete the deal flow. Taught me financial state machines and secure ETH transfers.

Solidity Access Control
View Repository →
TOKENOMICS // STANDARDS

ERC20 Implementation

A custom implementation of the ERC20 standard built from scratch. Includes transfer, approvals, allowance tracking, minting, and burning mechanics.

Solidity Token Mechanics
View Repository →
YIELD // TIME-LOCKS

Advanced Vault

A time-locked vault contract where users can deposit ETH and withdraw only after a specific lock period. Focuses intensely on time-based restrictions, safe withdrawal patterns, and contract balance management.

Solidity Time-Locks Accounting
View Repository →
FULL-STACK // WEB2

Job Portal

A comprehensive platform bridging frontend and backend systems. Engineered to master full-stack integration and database architecture.

React.js Python MySQL
POOL LOGIC // REWARDS

ETH Staking Contract

A complex staking contract where users deposit ETH and earn rewards over time. The system meticulously tracks user stake, reward accumulation, and allows users to claim rewards or unstake.

Solidity Reward Math Pool Architecture
View Repository →
[ 03 ]

Technical Stack

I am building a comprehensive foundation in the Ethereum ecosystem, focusing on smart contract development, seamless frontend integration, and essential developer tooling.

Smart Contracts

  • Solidity
  • Ethereum Development
  • Contract Architecture

Frontend & Full-Stack

  • React.js & Tailwind CSS
  • JavaScript (ES6+)
  • Python & MySQL
  • Ethers.js / Web3.js

Tools & Architecture

  • Git & GitHub
  • AWS & Cloud Architecture
  • UI/UX Design (Figma)
  • System Integration
SOLIDITY // YUL // DEFI // SMART CONTRACTS // ZERO KNOWLEDGE // OP SEC // EVM // WEB3 // PROTOCOL ENGINEERING // SOLIDITY // YUL // DEFI // SMART CONTRACTS // ZERO KNOWLEDGE // OP SEC // EVM // WEB3 // PROTOCOL ENGINEERING //
[ 04 ]

Operational Trajectory

2025 – PRESENT // PROTOCOL ENGINEERING

Protocol & Systems Engineer

Actively architecting and deploying core infrastructure for major Web3 initiatives:

  • PermaDEX (Derivatives Protocol) - Engineering a permissionless perpetual DEX on Avalanche. Features include custom market deployment, oracle-based pricing, and complex share-based liquidity accounting for fee distribution.
  • Tracefi (Demand Intelligence) - Architecting an automated data pipeline that ingests public social signals, processes noise through multi-layer qualification, and surfaces high-confidence, demand-backed market opportunities.
PRE-2021 // CYBERSECURITY

White Hat Bug Hunter

Operated as an independent security researcher before transitioning fully into Web3. Hunted vulnerabilities and audited system architectures across numerous Web2 FinTech applications, building a foundational mindset for zero-trust engineering.

JAN 2025 - APR 2025 // DIPC SOFTWARE

Full-Stack Engineering Intern

Engineered full-stack applications and integrated complex systems using React.js. Focused on bridging robust frontend interfaces with secure, scalable backend architectures.

2021 - 2025 // GUJARAT TECHNOLOGICAL UNIVERSITY

B.E. Information Technology

SAL Engineering and Technical Institute. Maintained an 8.05 CGPA while aggressively pivoting theoretical computer science fundamentals into practical Web3 and cryptography applications.

[ 05 ]

The Frontier

I’m currently pushing my boundaries by focusing on smart contract security and professional development workflows used in real-world blockchain projects.

Areas of Active Exploration

  • Hardhat  for advanced development, testing, and deployment workflows.
  • OpenZeppelin  libraries for secure and standardized smart contract components.
  • Slither  for static analysis and early vulnerability detection.
  • Echidna  for fuzz testing and contract security validation.
  • Smart contract  security patterns  and common attack vectors.
  • Gas optimization  techniques at the EVM level.
  • Writing comprehensive  automated tests  for smart contracts.
  • DeFi protocol  architecture and auditing fundamentals.

Ready to
Contribute.

My goal is to become a reliable smart contract developer who can design secure and efficient on-chain systems for serious blockchain infrastructure.

Open Transmission