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David S. Blockhain Developer, Solidity & Rust Smart Contract Developer

David S.

  • United States
  • Full-time (40 hrs/week)
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Passionate and highly-skilled Blockchain professional with hands-on experience building smart contracts and decentralized applications.

Software engineer, the decentralized application architect, certified Blockchain developer with expertise in smart contracts and decentralized applications development, also web development as well.

I specialize in Solidity, Smart Contracts, ether.js, web3.js, and JS/TS frameworks.

And I am also familiar with several Blockchain networks like Ethereum, Binance, Tron, Polkadot, Tezos, Matic, Huobi ECO chain, etc.

Skills and experiences

Skills and experiences

Blockchain Developer, Web3 Engineer

Block-chain Laboratories 09/2021 - present

Technical Scope: IDO, EVM, EWC, CELO, REEF, Smart Contract

  • Built token bridge between 3 EVM networks like celo, reef, ewc so that users are able to migrate their tokens.
  • Developed whole smart contract from scratch and passed the Audit from SlowMist.
  • Developed swapping logic smart contract with claim function between CRC and CCR token on Energy Web Chain

Key Achievements

  • NFT Swap
  • Claim • IDO
  • Token Bridge
  • Cross-Chain

Senior Blockchain Developer

Bytom Blockchain 03/2020 - 08/2021

Technical Scope: Ethereum, Smart Contract, Staking Rewards, Defi, NFT

  • Built and launched Smart Contracts for Genesis NFT, Pode and Marketplace as well. I’ve used ERC‑721 based NFT rather than ERC‑1155. 
  • Also built Staking Rewards contract, so investors earn MONA tokens by staking NFTs and LP tokens.
  • Kira Network provides various services like Auction, Staking, NFT, etc

Key Achievements

  • Genesis NFT • Pode
  • DigitalaxMarketplace
  • StakingRewards

Blockchain Specialist

Badger Blockchain 05/2019 - 02/2020

Technical Scope: Solidity, Python, Smart Contract

  • Developed Smart Contract for CVR token as a Blockchain developer. Worked on building desktop Wallet using QML.
  • Built DApps, software consisting of front‑end and decentralized back‑end.

Key Achievements:

  • Smart Contract with Solidity and desktop Wallet with QML. 
  • Developed Dapps with Javascript Libraries

Full Stack Developer

Astek 03/2017 - 01/2019

Technical Scope: React, Javascript, Node/Laravel, TypeScript

  • Design and build React-based applications on the Mail Parsing platform.
  • Follow coding standards and technology bootstraps, build, integration tests, and deployment scripts.
  • Integrate it with Node backend API.

Key Achievements

  • Proposed a POC of GUI for centralized functional administration of microservices in the Mail Parsing domain.
  • Successfully created a React-based frontend application compliant with the bank's corporate standards as well automated deployment pipeline.
  • Successfully integrated frontend application with a Node backend.
  • Successfully deployed application on production environment including integration with corporate web portal and LDAP.

Full-stack Developer

Novogene Global 04/2015 - 09/2017

Technical Scope: React, React Native, Angular, Node

  • Development and enhancements of websites and mobile applications.
  • Design and develop back-end RESTful API using Node.js, TypeScript.
  • Implement RESTful API test scripts and testing framework.

Key Achievements:

  • Development and enhancements of e-commerce website using React. Also participated in the development of a mobile app and mobile web views for the same customer using React Native.
  • Development of a website and mobile application for fintech start-up using React and React Native.

Educations and Certifications

Nanyang Technological University Singapore

Computer Engineering 2011 - 2014

Master's degree


Technical University of Munich

Computer Science 2009 - 2011

Bachelor's degree




Professional working


Native or bilingual
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