​​​​ Christopher Groeneveldt

Founding Engineer & CTO (Rust-Substrate DApp) 2023.7 ~ 2025.4 (Full Time - Remote)

Greenhouse gases exchanged marketplace platform for tokens, accelerated with DeFi loans

Earth Shepards (San Francisco, United States)

• Led the design and implementation of smart contracts for a blockchain-based sustainability platform, focusing on carbon credit tokenization and trade.

• Developed high-performance, gas-optimized smart contracts using Solidity and Rust, ensuring scalability and low-cost transactions in the Ethereum ecosystem.

• Customized and deployed an Ethereum-compatible fork (R-ETH client) to improve performance while maintaining compatibility with existing EVM tools and networks.

• Designed and implemented the PCAP(Personal Crypto Advertising Preference) based on Decentralized identity provider using Zero Knowledge Proofs and Blind Signatures.

• Utilized zk-SNARKs for privacy-preserving transactions, allowing users to transact without revealing sensitive environmental data.

• Integrated advanced cryptography techniques, such as Zero Knowledge Proofs (ZKPs), to verify data without exposing raw information.

• Designed and implemented decentralized identity (DID) system for SSI (Self Sovereign Identity) around the business model with Veramo SDK to provide secure identity verification on the blockchain.

• Developed Customer-Centric AD system based on W3C standard DID solution and implemented light wallet based on social media platforms and DID Avatar Solution integrated into social avatars.

• Built an EVM-compatible marketplace with user roles and token rewards, allowing individuals and businesses to buy, sell, and trade carbon credits.

• Developed Marketplace logic - create product, buy product, get reward, approve logic by admin, etc using 3 user roles (user/company/admin).

• Developed SHEAR token smart contract using Solidity based on ERC20 standards and implemented SHEAR token transaction flow each user (send/receive/airdrop) and made user register flow with creating new wallet for new user automatically (this is for non-blockchain user experience).

• Implemented the main app-chain modules by forking and customizing the EVM chain based on Rust-Substrate by customizing pallets on it.

• Implemented gas-efficient logic for ERC-20 and ERC-721 token standards to ensure smooth interaction within the platform.

• Established a robust React.js-based frontend that integrated seamlessly with blockchain backend using Web3.js and GraphQL.

• Deployed and managed infrastructure using AWS and Kubernetes, ensuring high availability and reliability for the platform.

• Conducted regular audits and stress tests to ensure platform stability, security, and scalability under varying loads.

• Built a comprehensive API to interact with blockchain data, enabling external partners to integrate with the platform for carbon credit tracking.

• Integrated tokenized incentives for carbon offset projects, enhancing the traceability and transparency of environmental efforts.

• Collaborated with product teams to define new features based on emerging blockchain technologies and user feedback.

• Automated deployment pipelines with CI/CD workflows, utilizing GitHub Actions for seamless integration and delivery.

• Provided mentorship to junior engineers and reviewed code to maintain high standards of code quality and security.

• Worked with external teams to extend the platform’s capabilities through third-party API integrations, expanding its use case ecosystem.

• Implemented a modular architecture to ensure future scalability, enabling the addition of new tokens and ecosystems.

• Contributed to the open-source community by releasing several libraries for carbon credit management and blockchain privacy.

• Engaged with industry experts and researchers to stay at the forefront of blockchain and environmental tech innovations.

• Mentored frontend and backend engineers on blockchain architecture, Web3 integration techniques, and wallet interaction best practices, fostering collaboration and knowledge sharing within the team.

Web: https://www.earthshepards.com

Github: https://github.com/chainguru1014/Earthshepards

Tech-stack: Rust, Solidity, Polkadot, Rust-Substrate, Ethereum, Smart Contract, Ink, EVM client(R-ETH), Zk-proof, DID, Veramo SDK, React.js, Typescript, GraphQL, Jira, GitHub, Kubernetes, AWS