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Hashgraph · 5 months ago

Staff Software Engineer - Smart Contracts Team

United States

Contract

Remote

Mid, Senior Level

7+ years exp

Hashgraph is a fast-growing software company committed to supporting, developing and servicing Hedera, an open source, proof-of-stake platform. The Smart Contracts team is looking for a seasoned engineer to contribute to the development of Hedera services in both Java and web3 APIs, focusing on processing smart contract transactions across the network.

Information TechnologyInternetNetwork Hardware

H1B Sponsor Likely

Responsibilities

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

JavaJavaScript/TypeScriptSolidity/VyperEVM knowledgeRESTful API designSmart contract developmentDistributed application developmentDebugging skillsTest-driven developmentContinuous integrationSecurity principlesCryptographic toolsCritical thinkingInterpersonal skills

Required

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

Preferred

Knowledge of the Hedera network

Deep knowledge of and experience with the Java VM, covering its strengths and weaknesses

5+ years of Java experience

Deep knowledge of and 5+ years of 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

Company

Hashgraph

Our mission is clear: to cultivate a secure, trusted, and sustainable decentralized world.

Founded in 2022

Dallas, Texas, USA

51-200 employees

https://swirldslabs.com

H1B Sponsorship

Hashgraph has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)

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Trends of Total Sponsorships

2023 (1)

2022 (1)