Hashgraph is a fast-growing software company committed to supporting, developing and servicing Hedera, an open source, proof-of-stake platform. Hedera is EVM-compatible and has been specifically built to meet the needs of enterprise and Web3 applications, which require speed, security, stability and sustainability. Hedera’s public network is governed by industry-leading organizations, spanning 11 sectors and 14 regions who oversee the development and direction of the decentralized platform.

About The Role:

The Smart Contracts team is looking for a seasoned engineer who can contribute to the development of the Hedera services in both the Java and the web3 APIs in JS/TS that process smart contract transactions across the network submitted using varied web3 tools.

You may find yourself doing all of the following:

Staying connected with the EVM ecosystem, bringing vital learnings, discussions, and applicable explorations on Hedera back to the team to improve EVM DevEx
Implementing and enhancing the Java-based smart contract services on the Hedera network that parse byte code and process transactions submitted to the network via an EVM client
Designing, developing, and maintaining server-side logic for back-end solutions with public APIs involving TypeScript, SQL, data ingestion, REST, GraphQL, and Web Sockets
Applying Web3 knowledge of Solidity and EVM transactions life cycle
Writing efficient, reusable, and reliable code to optimize for maximum speed, scalability, and system efficiency
Exploring and unblocking web3 tool and DApp integration capabilities on Hedera, ensuring devs can continue to use their familiar tools when migrating to Hedera from other EVM chains
Continuously discovering, evaluating, and implementing new technologies to maximize development efficiency and effectiveness
Developing various aspects of the Hedera Hashgraph Distributed Ledger Ecosystem
Being a strong and proficient hands-on programmer
Spending 80% of your time designing, coding, and testing

Qualification Requirements:

Experience with distributed open-source application development
Excellent debugging, critical thinking, and interpersonal skills
Knowledge of the blockchain technology ecosystem, particularly the EVM
Expertise in the Java and JS/TS programming language and its ecosystem of libraries and tools
Experience with smart-contract development with Solidity/Vyper, Foundry, Web3.js / Ethers.js frameworks, JavaScript/TypeScript
Experience with Ethereum Development Suites (e.g., Harhat, Foundry, Truffle, Ganache, Tenderly)
Experience writing secure, efficient, and gas-optimized smart contracts for decentralized applications (DApps) on EVM-compatible networks
Understanding of Ethereum ecosystem ERC20s, ERC721s, ERC1155s, on-chain and off-chain
Experience with Wallet integrations (MetaMask, WalletConnect, etc.): Tools and libraries for connecting Web3 applications with users' cryptocurrency wallets
Strong understanding of RESTful API design and development
Familiarity with test-driven software development processes and continuous integration tools and systems
Experience with web3 tools that support development, indexing, and transaction management, such as TheGraph
7+ years of software development experience
Master’s degree in Computer Science or a similar field or equivalent work experience

Other skills that are great to bring with you but that we can help you develop:

Knowledge of the Hedera network
Deep knowledge of and experience with the Java VM, covering its strengths and weaknesses
Deep knowledge of and experience with Node JS, covering its strengths and weaknesses
Strong grasp of Computer Science fundamentals including concurrency, performance optimization, and reusability
Strong engineering principles and processes aimed at developing simple, modular, testable, and high-quality code
Familiarity with security principles, cryptographic tools and libraries
Familiarity with high-performance architectural systems and design patterns

Apply now

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