Lesther – Smart contracts, Solana, Rust

A decentralized broadband network that enables users to share internet capacity, effectively becoming their own providers. By combining protocol and hardware, it creates a trustless, on-chain system for user-owned connectivity.

• Developed Solana Rust smart contracts using Anchor in order to allow customers to register devices, create plans and pay for subscriptions;
• Developed replicable local environment for smart contract interaction using Typescript;
• Worked on Go backend in order to expose API to customers, stream data from different services using NATS, listen to Smart contract events and update customer data;
• Migrated Rust backend to Go keeping the same API;
• Created private Go library in order to share avoid code duplication across services.

A trading terminal designed to unify the experience across multiple blockchains. It simplifies complex on-chain operations for both retail and institutional traders.

• Developed a Rust-based Solana smart contract for swap integration;
• Created trade feature in the backend though agregators by exposing a websocket and API endpoints;
• Worked on blockchain raw data ingestion in order to expose blockchain analytics such as candle ticks, transactions, balances, etc;
• Implemented MEV protection option for users' trades.

A staking feature that enables users to stake $TARS tokens on Solana and earn APR based on the lock period.

• Developed Solana smart contracts in order to enable users to stake and withdraw rewards;
• Created a private npm library with TypeScript to abstract the complexity of the smart contract interaction;
• Implemented the frontend using TypeScript with Vite + React for the user interface, alongside Next.js for the admin dashboard;
• Built Solana indexer using Postgres in order to perform complex off-chain calculations.

A specialized Layer 1 blockchain built on the Cosmos SDK, focused on decentralized custody and omnichain interoperability, aiming to eliminate single points of failure in bridges and custodial systems.

• Created Solana smart contracts in order to wrap/unwrap BTC through a bridge;
• Integrated Smart contracts in Cosmos Module using Go;
• Unit tests integration using Go and Typescript.

A chain abstraction protocol designed to unify the multi-chain experience by aggregating assets across different blockchains (like Ethereum, Solana, and Arbitrum) into a single logical account with a unified balance.

• Developed Account Abstraction smart contract using Solidity, including role-based validation;
• Created API endpoints in order to create a wallet, predict an address, swap across chains, etc.;
• Integrated endpoints in React application.

A hybrid, chain-agnostic blockchain focused on identity and compliance, enabling Web3 and traditional companies to launch KYC-, AML-, and DPR-compliant applications with enhanced data privacy; supports both EVM and Cosmos.

• Contributed to the open source Swisstronik SDK in order to expose the blockchain interaction using TypeScript;
• Created an open-source web3.js-compatible library using TypeScript in order to enable interaction with web3.js;
• Created an open source viem compatible library using TypeScript in order to enable interaction with viem;
• Developed examples using Solidity to demo the swisstronik core functionality;
• Developed React templates with third-party compliance services such as Worldcoin, Quadrata, and Nexera.