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Hashgraph · 5 months ago

Principal Software Engineer - Java

United States

Full-time

Remote

Lead/Staff

10+ years exp

Hashgraph is a fast-growing software company committed to supporting and developing Hedera, an open-source proof-of-stake platform. They are seeking a Principal Software Engineer - Java who will be responsible for designing and writing low-latency, high-throughput Java systems, mentoring engineers, and making design decisions that affect the architecture of a public ledger.

Information TechnologyInternetNetwork Hardware

H1B Sponsor Likely

Responsibilities

Inventing new protocols, data structures, and algorithms to solve problems no one else has tackled before

Designing and writing low-latency, high-throughput Java systems from scratch

Tuning memory usage down to the byte, and measuring performance down to the nanosecond

Writing parsers, interpreters, and other core infrastructure from first principles

Mentoring senior and staff engineers while leading complex technical initiatives

Creating tools and profilers to measure and improve execution across the stack

Making design decisions that will affect the architecture and correctness of a publicly visible ledger

Switching fluently between system-level design and single-instruction-level optimization

Building tests and harnesses that help ensure nothing ever breaks, ever

Qualification

JavaPerformance profilingHigh-performance codeComputer science fundamentalsBuilding systems from scratchLanguage toolingCode qualitySystem designDistributed systemsBlockchainWeb3 toolsTest-driven developmentContinuous integration

Required

10+ years of professional software development experience

Deep mastery of Java and the JVM: memory models, threading, GC behavior, and performance profiling

Experience with parsers, interpreters, compilers, or other language tooling

Demonstrated ability to write and optimize high-performance code with minimal dependencies

Strong grasp of computer science fundamentals such as data structures, algorithms, concurrency, etc

Significant experience building systems where performance and correctness are non-negotiable

Ability to build from scratch–given just an IDE and the JDK, you can deliver a working, high-performance server

Experience with tools like JMH, PBJ, async-profiler, JFR, Solo, YourKit, or similar

Having a passion for code quality, system design, and doing things the right way

Master's degree in Computer Science (or equivalent experience)

Preferred

Experience in distributed systems and/or blockchain

Knowledge of cryptographic tools, libraries, and primitives (e.g., hashes, public/private keys)

Familiarity with web3 tools or smart contract platforms (especially EVM)

Experience with event-driven architectures or high-frequency trading systems

Understanding of test-driven development and continuous integration practices

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)

Distribution of Different Job Fields Receiving Sponsorship

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Trends of Total Sponsorships

2023 (1)

2022 (1)