Rama Chandra Reddy.
Self-taught blockchain engineer and smart-contract auditor — 3+ years on Ethereum, 2+ on Solana. I build the whole stack, from Solidity and Anchor contracts to Node.js backends and React Native apps, and hunt vulnerabilities in audit contests on Code4rena, Cantina, and Sherlock.
Self-taught, working on-chain.
I build the full stack — from Solidity and Anchor contracts to React and React Native front-ends — and I audit them too, with a deep interest in how the EVM & SVM actually work under the hood.
- Born5 March 2004
- LocationGuntur, Andhra Pradesh, India
- DegreeB.Tech, Computer Science · 2026
- Emailrcrtavanam@gmail.com
- StackEthereum · Solana · MERN
- FreelanceAvailable
I completed my Computer Science degree at RGUKT Nuzvid in 2026. I started building on Ethereum in 2022 and on Solana the year after, with hands-on knowledge of Merkle trees, Solana Pay & Blinks, and applied cryptography.
I move comfortably from NFTs to DeFi protocols — and increasingly into auditing them — always adopting new tools that make a protocol safer and a build faster.
Tools of the trade.
The languages, frameworks and testing tooling I reach for — always with an eye toward scalable, secure builds.
My Résumé
Blockchain engineer and smart-contract auditor with 3+ years on Ethereum and 2+ on Solana, plus full-stack MERN, Node.js backends (with cron jobs), and Android (React Native / Expo). I ship end to end — from Solidity and Anchor contracts to production mobile apps — and have built everything from NFTs to DeFi protocols, with a strong grasp of EVM & SVM internals, Merkle trees, Solana Pay & Blinks, and applied cryptography. I compete in audit contests on Code4rena, Cantina and Sherlock, write on security and DeFi, and have deep-dived Compound, Uniswap V3, Aave and GMX.
- Ethereum · 3+ yrs
- Solana · 2+ yrs
- Smart-contract auditor
- Full-stack · MERN
- Android · RN / Expo
Experience
Blockchain Engineer
Jul 2025 — PresentChain Systems
- Led the build of Ping Pay, a non-custodial Solana wallet (Android) now serving 1,000+ users and ~$10–12M in wallet assets, where users earn rewards paying at Ping Pay stores; wrote the v1 store-payment contracts in Solana / Anchor.
- Shipped Ping Pay v2 — a referral system, a hardened on-chain rewards mechanism, and a companion browser wallet extension; currently building a store lending system.
- Built Sol Maker (sol-maker.com), a no-code token launcher: configure mint / freeze / metadata authorities, set custom mint-address prefixes & suffixes, and manage burns, freezes, ownership and metadata from a simple form.
- Solo-built Sword Master — Android + Telegram mini-app (@sword_game_bot) — full frontend and backend: a watch-to-earn game (swords, shields, gold) where gold converts to vouchers redeemable in the KOLS shopping app, plus an admin panel for operations and player rewards.
- Shipped two KOLS on-chain games on Ethereum using Chainlink VRF: a bet game paying 0–2× (claw) and a slot / roulette jackpot (roulette).
- Architecting a Perpetual Futures DEX (Ethereum, current) — a modular, diamond-style delegatecall-router protocol for leveraged long / short positions settled in USDT: central Vault custody, a two-step keeper execution model for front-running protection, dynamic skew / funding / borrow fees, liquidations and stop-loss / take-profit triggers, a manipulation-resistant multi-source oracle (Chainlink + DEX median + PancakeSwap), an on-chain referral layer, and emergency settlement — backed by a full Foundry suite of unit + fuzz / invariant tests across every manager, library, the oracle, referral and vault.
Blockchain Intern
Mar 2025 — July 2025Straw Hat XYZ · Bangalore
- Led the operations of a Solana development lab run by the company in collaboration with the college.
- Researched cryptography methods to strengthen encryption / decryption and data security.
- Designed a complete blockchain architecture from scratch, referencing Flow, Hyperliquid and Bullet for scalability, security and efficiency.
Freelance Smart-Contract Developer & Auditor
Self-employed · Fiverr & open source
- Built token-sale platforms for the Karma and mintore.io projects.
- Audited presale smart contracts for clients (see Security & Auditing).
Security & Auditing
Sherlock — Mellow Flexible Vaults 1 High1 Med
Recently surfaced a high- and a medium-severity bug, strengthening the vaults' flexible DeFi operations.
Sherlock — LEND Protocol 3 High
Found three high-severity issues, hardening the protocol's lending mechanisms.
Code4rena — Kinetiq Protocol 1 High
Apr 2025Competitive audit (Apr 7–16, 2025); reported one high-severity bug.
NRI Token Presale — Ethereum Client
Private presale-contract audit via Fiverr — identified vulnerabilities and secured token distribution.
CTFs & tooling
Ethernaut, Damn Vulnerable DeFi, Paradigm, QuillCTF and Capture the Ether; static analysis with Slither & MythX, with published solution write-ups for the Web3 community.
Languages & Tools
Languages
- Solidity
- Rust
- TypeScript
- JavaScript
- Python
- Java
- PHP
- SQL / MySQL
- MongoDB
Frameworks & tooling
- Foundry
- Hardhat
- Anchor
- Web3.js
- Wagmi / Viem
- Ethers.js
- Chainlink
- React.js
- Next.js
- React Native
- Expo
- Node.js
- GraphQL
- IPFS
- Infura / Alchemy
- Slither / MythX
Education
B.Tech, Computer Science
2022 — 2026RGUKT, Nuzvid
- 8.5+ CGPA across semester exams
Pre-University Course
2020 — 2022RGUKT, Nuzvid
Courses
- Web3 Development & Security with Foundry Entry → Advanced
- Owen Thurm — Advanced Web3 Security Advanced
- Fuzzing Workshop — Trail of Bits Advanced
- Solana Bootcamp 2024 Entry → Advanced
Field Notes.
Perpetual Contracts
A modular, diamond-style perpetual futures DEX in Solidity — two-step keeper execution, dynamic funding / borrow / skew fees, a multi-source price oracle, and a full Foundry unit + fuzz test suite.
Compound V3
A deep dive into Comet's single-borrowable-asset design: the interest-rate model, the accrual engine, supply / borrow paths, liquidation, reserves, and COMP rewards.
Uniswap V2
A walk-through of the constant-product AMM: pair contracts, the x·y=k invariant, TWAP oracles, flash swaps, and the core / periphery split.
Uniswap V3
How concentrated liquidity works: ticks, price ranges, Q64.96 fixed-point math, and the capital-efficiency gains over V2.
Account Abstraction
Separating account logic from the protocol — ERC-4337, UserOperations, bundlers, paymasters, and smart-contract wallets for a smoother UX.
Book of Proxy
A field guide to upgradeable contracts: transparent vs UUPS proxies, the diamond / AppStorage pattern, delegatecall pitfalls, and storage-collision safety.
Damn Vulnerable DeFi
Offensive-security challenges across flash loans, price oracles, governance, lending pools, smart-contract wallets, and timelocks.
Ethernaut
Classic smart-contract security puzzles — reentrancy, integer overflow, delegatecall, and access-control bugs — at increasing difficulty.
How I can help.
Whether you need a protocol architected from scratch, a contract reviewed, a mobile dApp shipped, or a front-end wired to the chain — here's where I plug in.
Smart Contract Development
Shipping DeFi protocols, DEXs, on-chain games, NFT systems and token tooling on Ethereum (Solidity + Foundry) and Solana (Anchor / Rust).
Smart Contract Auditing
Competitive audits on Sherlock, Code4rena and Cantina with confirmed highs and mediums — plus private audits for presales, lending and DeFi clients.
DeFi Protocol Architecture
Designing modular systems — perpetual DEXs, vault custody, multi-source oracles, funding-rate engines, two-step keeper execution and referral layers.
Smart Contract Testing
Full Foundry suites — unit, fuzz and invariant tests — plus static analysis with Slither and MythX across every manager, library and vault execution path.
Mobile & Browser Extension dApps
Production Android apps and Chrome wallet extensions built with React Native / Expo — non-custodial wallets, games, reward pipelines and admin panels.
Web3 Frontend & Wallet Integration
Polished dApp UIs in React / Next.js wired to Ethereum via wagmi & viem and Solana via wallet adapter, Solana Pay and Blinks.
Let's build something.
Have a protocol in mind, a contract to audit, or a role to fill? Drop a line — I read every message.