Joni

Laitinen

• Engineered high-performance Solana programs(Smart Contracts) using Rust and the Anchor framework, optimizing transaction latency by 20% and increasing throughput by 30% for DeFi applications and NFT games. • Architected and developed custom DEX platforms, integrating features such as AMMs, liquidity pools, and DAO governance, achieving 99.9% uptime and processing over $1 million in transactions daily. • Built customized blockchain infrastructures and protocols using Rust with Substrate and ink!, improving scalability by 25% and reducing network latency by 20%. • Integrated blockchain solutions for secure interactions and enhanced decentralized functionalities using Wormhole for cross-chain messaging, achieving a 40% improvement in cross-chain transaction efficiency. • Led the development of smart contracts using Solidity on Ethereum, focusing on performance optimization and security, including compliance with EIP-4337 standards

• Developed and implemented NFT lending and borrowing protocols using Rust, integrating with Solana, Polygon, and Arbitrum, achieving a 50% increase in transaction throughput and an 80% reduction in gas fees. • Engineered high-performance smart contracts for variable interest rate loans and liquidity pools using Rust on Solana and Solidity on Ethereum, focusing on cross-chain interactions to leverage Solana’s high throughput and reduce transaction costs by up to 60%, improving processing efficiency by 40%. • Enhanced the Honey DAO governance framework by creating tools with TypeScript and Node.js to streamline voting and proposal management, improving governance participation by 35% and facilitating more effective decision-making.

• Designed and implemented smart contracts for the Jungle Cats NFT project on Solana, using Rust and Anchor to handle over 10,000 NFT transactions efficiently. • Integrated Metaplex for NFT minting and metadata management, enhancing contract functionality and optimizing interactions with the Solana blockchain. • Utilized Solana CLI and localnet for deployment and testing, achieving a 30% improvement in contract performance and ensuring secure, scalable NFT operations.

• Developed staking smart contracts in Rust for Polkadot, leveraging Substrate’s modular framework and achieving a 30% increase in cross-chain liquidity through XCMP (Cross-Consensus Messaging). • Engineered backend infrastructure with Rust and WebAssembly (Wasm) to enable secure cross-chain staking operations, reducing transaction latency by 40%. • Built RESTful APIs in Rust and Node.js to facilitate real-time communication between the frontend and blockchain nodes, ensuring 99.9% uptime. • Built the frontend with React.js and TypeScript, improving transaction processing times by 20% through optimized WebSocket handling. • Integrated Polkadot.js API and Substrate RPC nodes to facilitate staking management and governance voting, overseeing more than $5M in staked assets across multiple blockchain ecosystems.

• Contributed to building Radicle’s decentralized protocol by designing and optimizing peer-to-peer communication using Rust’s libp2p and mio libraries, improving message propagation speed by 30% and ensuring reliable network connectivity. • Implemented cryptographic identity and authentication mechanisms using libsodium and ring libraries in Rust, enhancing security for code collaboration by 40%. • Engineered microservices architecture and backend systems in Rust using Actix and Tokio, enhancing system scalability and reducing latency by 40% for high-traffic client applications. • Developed and optimized RESTful APIs with Go and the Gin framework, implementing advanced authentication and rate limiting, leading to a 30% increase in API performance and security. • Led the development of cloud-native backend solutions in Go using Docker, Kubernetes, streamlining CI/CD pipelines and reducing deployment times by 50%. • Implemented real-time data streaming platforms in TypeScript using Node