Marek Dvojak

Engineered advanced smart contracts using Rust and Anchor 0.30+, focusing on high-performance DeFi platforms, NFT infrastructure, and gamified token economies. Developed variable Solana trading bots, including sniper bots, copy trading bots, volume bots for several DEX, optimized for block-level latency and profit execution. Implemented Token-2022 SPL standards, adding confidential transfers, transfer hooks, and programmable token logic tailored for staking, rewards, and deflationary mechanics. Designed and implemented Play-to-Earn (P2E) game smart contracts on Solana, focusing on tokenized in-game assets, reward distribution, and player progression mechanics. Cross-chain bridges integration, Wormhole and Allbridge, for moving assets between Solana and EVM chains. Actively worked on Solana MEV capture strategies, flash loans, and cross-chain bridge integration for asset arbitrage. Engaged in Solana community updates, integrating new tooling (like Helius, Clockwork, and Solana Pay) to stay aligned with L1 protocol advancements.

Built and deployed advanced Rust/Anchor (0.31+) smart contracts including Pumpfun fork contract integrated main Pumpfun logic, Raydium CP-Swap (Concentrated Liquidity) pools and automated liquidity provisioning using CPI calls. Built and optimized Solana smart contract games such as Jackpot, Plinko and Coinflip integrating Orao Oracle VRF for verifiable randomness. Implemented Meteora token locking and vesting mechanisms through CPI integration with Jupiter’s jup-lock program, ensuring secure escrow and scheduled unlocks. Developed multiple TG and Discord bots, including a fork of the DeployOnVortex TG bot, enabling token deployment, trading, and on-chain interaction directly from chat platforms. Created high-performance DEX data parsers and indexers using tools such as Substream, enabling real-time trade analytics and historical indexing for Solana markets. Created Twitter-triggered token buy bots that listen to the Twitter API for specific triggers, execute token swaps via Jupiter, use Astralane/Jito for MEV protection and rapid transaction confirmation, and send instant trade notifications via Pushover. Bonkfun bundlers, and advanced Bonkfun trading bots. Built a Pumpfun sniper bot leveraging cutting-edge Jito Shredstream and Helius Laserstream for sub-second block execution.

Transitioned to Anchor framework, refactoring legacy Solana programs for maintainability, security, and developer efficiency. Developed DeFi protocols, including staking contracts, lending platforms, liquidity pools, and automated market makers (AMMs) on Solana. Integrated Pyth and Switchboard Oracles for price feeds in lending and trading protocols. Developed NFT minting, auctions, and marketplace contracts following Metaplex Candy Machine v2 standards. Worked during the boom of NFTs (Degenerate Ape Academy, Solana Monkey Business) and DeFi summer on Solana. Implemented cross-program invocations (CPI) and multi-signature wallets, ensuring modular and secure smart contract interactions. Built CPI-based liquidity provisioning and token swap contracts interacting with Raydium, Saber, and Orca. Improved developer tooling with TypeScript SDKs, Anchor IDLs, and localnet simulation scripts. Deliver fully integrated dApps using React, Next.js, and TypeScript, including token launchpads, analytics dashboards, and staking portals. Designed Yield Farming & Governance Mechanisms, implementing DAO structures where token holders could vote on protocol changes.