Principal Software Engineer

About Hashgraph:

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 Block Node team is developing a new network node type designed to decentralize data storage and access, enabling independent operators to serve verified block and state data directly from the consensus network.

As such the team is looking for a seasoned engineer who can contribute to the development of the Java-based low-latency, high-throughput Hedera block node product. You will work directly with foundation, consensus, execution and mirror node teams to ensure the decentralized and embedded trust of the block streams is verifiable and available to all.

This is a hands on development role on a green field high visibility project with lots of opportunities to contribute to architecture and node operator experience definition.

You may find yourself doing all of the following:

• Implementing and enhancing Java-based low latency streaming and long-term storage management features
• Designing, developing, and maintaining server-side logic for backend solutions with public APIs involving gRPC
• Managing efficient serialization and deserialization of protobuf
• Writing efficient, reusable, and reliable code to optimize for maximum speed, scalability, and system efficiency
• Continuously discovering and evaluating alternatives for architectural review and implementing new technologies to maximize development efficiency and effectiveness
• Performance tuning core Java modules
• Designing high-performance, low-latency matching algorithms of a multi-threaded in-order message service
• Staying connected with the web3 ecosystem bringing vital learnings, discussions, and applicable explorations on blockchain validators and verifiers bringing them back to the team to improve
• Developing various aspects of the Hedera Hashgraph Distributed Ledger Ecosystem
• Spending 80% of your time designing, coding, and testing

Qualification Requirements:

• 10+ years of software development experience
• Master’s degree in Computer Science or a similar field or equivalent work experience
• Expertise in Java concurrency and data IO
• Experience with tools like JMH, PBJ, async-profiler, JFR, Solo, YourKit, or similar
• Excellent debugging, critical thinking, and interpersonal skills
• Familiarity with event-driven and test-driven software development processes and continuous integration tools and systems
• Strong grasp of Computer Science fundamentals, including concurrency, performance optimization, and reusability

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

• Deep knowledge of and experience with Java VM, covering its strengths and weaknesses
• Deep knowledge of and experience with high frequency message broker technologies
• Deep knowledge of and experience with Helidon
• Strong engineering principles and processes aimed at developing simple, modular, testable, and high-quality code
• Knowledge of blockchain/DLT technology ecosystem
• Familiarity with security principles, cryptographic tools and libraries
• Familiarity with high-performance architectural systems and design patterns