Sivaji gadidala sivajisj

👨‍💻 About Me

Full-stack blockchain engineer shipping production systems across four pillars: Solana (Anchor, SPL, PDAs, CPIs), Ethereum/EVM (Solidity, Hardhat, OpenZeppelin), Rust backend infrastructure (Axum, Tokio, async microservices), and Web3 frontend engineering (Next.js dApps, wallet integrations, real-time on-chain UIs). I build complete decentralized systems end-to-end — on-chain programs, smart contracts, high-throughput Rust APIs, event-driven relayers, and the Next.js frontends that make them usable: wallet connection flows, contract-driven state, and live on-chain data rendering.

Currently building at Simreka Softwares Pvt. Ltd., and actively expanding into DePIN (decentralized physical infrastructure) protocols on Solana.

Solana         →  Anchor · SPL · PDAs · CPIs · Token 2022 · sBPF
Ethereum/EVM   →  Solidity · Hardhat · OpenZeppelin v5 · ethers.js v6
Rust Backend   →  Axum · Tokio · Serde · SQLx · async/await · REST & gRPC
DePIN          →  On-chain heartbeats · uptime proofs · trustless rewards
Web3 Frontend  →  Next.js (App Router) · React · TypeScript · Redux Toolkit
                  ethers.js/web3.js integration · MetaMask & wallet flows
                  Tailwind CSS · SSR/ISR for dApps · live contract-state UIs

🚀 Now Building

🛰️ DePIN infrastructure on Solana — trustless, cryptographically-verified uptime tracking for physical hardware (see RouterPulse below) 🗳️ On-chain governance primitives — wallet-gated voting systems with smart-contract-sourced truth (see Voting Board below) 🎨 Next.js dApp frontends — wallet-first UIs that read state straight from smart contracts: connection flows, transaction lifecycle UX, and live on-chain data visualization

🔗 Featured Projects

⛓️ Solana & DePIN

📡 RouterPulse — DePIN Uptime Protocol

Trustless Wi-Fi router uptime tracking and reward-distribution protocol. Replaces self-reported uptime claims with cryptographic, on-chain proof — routers submit signed heartbeat transactions that are permanently recorded on Solana.

⚙️ Automated uptime scoring engine — +1 per on-time heartbeat, −10 per late one, auto-suspend at 20
💰 Reward distribution computed purely from verified on-chain uptime %, not operator self-reporting
🖥️ No public UI — pure on-chain program + local heartbeat simulator (3 simulated routers, varying failure rates) for testing
Stack: Rust Anchor 0.30 Solana TypeScript (simulator) solana-test-validator
Status: 🧪 Local devnet simulation

⚡ Solana Programs — Anchor Framework

On-chain programs leveraging core Solana primitives.

Scope: Custom PDAs · CPI composition · SPL Token minting & transfer · Token 2022 extensions
Stack: Rust Anchor @solana/web3.js Solana CLI
Concepts: Account validation · Program-derived addresses · Cross-program invocations · Associated token accounts

🏛️ Ethereum / EVM

🗳️ Decentralized Voting Board

On-chain voting platform — admins create proposals and register voters; voters connect MetaMask and cast votes that settle directly on-chain, with live chart-based result visualization.

✅ Vote counts read live from the smart contract, never cached or trusted from the DB — eliminates double-voting and result tampering
👤 Admin dashboard for proposal creation & voter registration; separate voter dashboard for wallet-gated voting
🎨 Next.js frontend with MetaMask connection flow, transaction-state UX (pending / confirmed / reverted), and chart-based live result visualization driven by contract reads
🔐 JWT auth in httpOnly cookies layered on top of on-chain vote integrity
Stack: Next.js TypeScript Solidity Hardhat ethers.js v6 MongoDB MetaMask
Status: 🧪 Local Hardhat network + MongoDB

🌉 Cross-Chain Token Bridge — Sepolia ↔ Polygon Amoy

Lock-and-mint architecture bridging ERC-20 tokens across L1/L2 chains.

Pattern: Lock on source chain → event-driven Node.js relayer → mint on destination chain
Frontend: React bridge UI with wallet connection, automatic network switching between Sepolia and Amoy, and per-step transaction status feedback across both chains
Stack: Solidity Hardhat OpenZeppelin v5 ethers.js v6 Node.js React MetaMask
Status: ✅ Deployed & verified on live testnets

🏦 DeFi Lending Protocol

Permissionless lending and borrowing with collateral management.

Features: Deposit, borrow, repay, liquidation logic, interest accrual
Pattern: Over-collateralized lending with on-chain price feed integration
Frontend: React dashboard surfacing live positions, health factor, and collateral ratios read directly from the protocol contracts
Stack: Solidity Hardhat OpenZeppelin ethers.js React

🦀 Rust Backend & AI Security

⚙️ High-Performance Transaction Service

Async transaction-processing microservice built for blockchain workloads.

Features: Transaction queuing · status tracking · retry logic with backoff · webhook notifications · multi-chain support
Design: Fully async, non-blocking architecture — zero-cost abstractions and memory safety for high-throughput, low-latency pipelines
Stack: Rust Axum Tokio Serde SQLx PostgreSQL

🤖 AI-Powered Blockchain Security Agent

Autonomous agent for smart contract vulnerability detection and on-chain analytics.

Detects: Reentrancy · integer overflow · access control flaws · unchecked external calls
Features: Static Solidity analysis · AI-driven audit report generation · transaction pattern recognition · real-time anomaly detection
Stack: Rust Python LLM APIs Solidity AST parsing Node.js React

🛠 Tech Stack & Skills

⛓ Blockchain — Languages & Frameworks

🔧 Blockchain Tooling

🦀 Rust Backend

🖥 Node.js / Infra

🎨 Frontend Engineering

🪙 dApp / Web3 Frontend

🔨 Dev Tools

🧠 Concepts & Primitives

Solana / Anchor

✦ Program Derived Addresses (PDAs)     ✦ Cross-Program Invocations (CPIs)
✦ SPL Token standard                   ✦ Token 2022 extensions
✦ Associated Token Accounts (ATAs)     ✦ Account validation & constraints
✦ sBPF VM internals                    ✦ Anchor account macros & IDL generation
✦ Instruction data serialization       ✦ Rent & lamport management
✦ On-chain heartbeat/proof patterns    ✦ Trustless reward distribution (DePIN)

Ethereum / EVM

✦ ERC-20 / ERC-721 / ERC-1155          ✦ Proxy patterns (UUPS, Transparent)
✦ Cross-chain bridge architecture       ✦ Lock-and-mint pattern
✦ Over-collateralized lending           ✦ Liquidation mechanics
✦ OpenZeppelin v5 contracts             ✦ Gas optimization techniques
✦ Event-driven relayer design           ✦ Hardhat forking & testing
✦ On-chain source-of-truth voting       ✦ Wallet-gated authorization flows

Rust Backend Systems

✦ Async/await with Tokio runtime        ✦ Axum web framework & routing
✦ Serde serialization/deserialization   ✦ SQLx async DB queries
✦ REST API design & error handling      ✦ Middleware & tower layers
✦ Ownership & borrowing model           ✦ Trait-based abstractions
✦ Microservice architecture             ✦ gRPC with tonic

Web3 Frontend / dApp Engineering

✦ Next.js App Router & SSR/ISR          ✦ Wallet connection & session flows
✦ Contract reads as source of truth     ✦ Transaction lifecycle UX
✦ ethers.js v6 / @solana/web3.js        ✦ Network detection & auto-switching
✦ Event subscriptions → live UI state   ✦ Optimistic updates & re-fetch on block
✦ Redux Toolkit for dApp state          ✦ Typed contract bindings in TypeScript
✦ Wallet-gated routing & auth           ✦ On-chain data visualization (charts)

💼 Experience

Role	Company	Period
Full Stack Blockchain Engineer	Simreka Softwares Pvt. Ltd.	Aug 2024 – Present
Blockchain Developer Intern	Octaverse LLP	Prior

📊 GitHub Stats

📫 Open to Opportunities

Actively looking for Blockchain Engineer, Rust Backend Engineer, and Frontend Engineer (Web3/dApp) roles focused on:

Solana programs & DePIN protocols (Anchor, Rust, SPL)
Ethereum/EVM smart contract & protocol development
Cross-chain infrastructure and bridge architecture
High-performance Rust backend services for Web3 products
Next.js dApp frontends — wallet integrations, transaction UX, and live on-chain data interfaces

Reach me: sivajigsivajig703@gmail.com · LinkedIn

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