Smart Contract and Backend Blockchain Developer

About Us

HashEx vision is to become #1 DeFi Security Provider.

We believe that by providing a full stack of affordable tools and services, we can set new security standards and make the decentralized world better and safer, together. We're always looking for talented humans who are passionate about decentralized technologies and security, and ready to build the future alongside us.

What we're looking for

HashEx is seeking a talented individual who possesses infinite curiosity and passion for security. As a Smart Contract and Backend Blockchain Developer, you'll work in a team of experienced engineers to deliver the new security standards on decentralized markets.

Responsibilities

• Writing high-quality, well-tested, and gas-efficient smart contracts
• Writing backend services for smart contract interaction
• Playing an active role in the design and architecture of our solutions
• Working with existing contracts and implementing new features based on the project roadmap
• Working effectively with a high degree of autonomy, within a collaboratively minded team
• Code reviews and audits
• Writing technical documentation for smart contracts

Qualifications

• Understanding of how Blockchains work, especially Ethereum
• Experience in smart contract development with Solidity programming language
• Ability to write very high-quality, well-tested code
• Experience with architecture in onchain to offchain systems
• Passion for Open Finance/ Defi or Trading
• Ability to learn and adapt to a rapidly evolving tech stack
• Strong communication and collaboration skills
• Good written English

Preferred

• Good understanding of continuous integration tools and blockchain management tools
• Knowledge of Web3 and Ethereum development and test tools (Truffle or Hardhat)
• Knowledge of market structures and exchange related concepts
• Experience with Node.js
• Familiarity with decentralized finance, upgradeable smart contracts, proxy patterns, and experience working with ZeppelinOS
• Experience with Mocha JavaScript test framework and Chai’s assertion library
• Familiarity with cryptography and experience with Public Key Infrastructure (PKI)

Benefits

• Fast-growing and unique business challenges
• Learning from expirienced team that made 200+ smart contact audits and never missed high severity bugs
• Writing code for projects with high TVL
• International working environment in a team of people who are passionate about big goals
• Great career opportunities in a developing company
• Opportunity to develop both personally and professionally
• Progressive salary and bonuses
• Remote work and flexible hours
• Annual corporate retreat