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Principal Software Engineer - Java

Job in Germany, Ohio, USA
Listing for: P2P
Full Time position
Listed on 2026-01-12
Job specializations:
  • Software Development
    Software Engineer, Java Developer
Salary/Wage Range or Industry Benchmark: 80000 - 100000 USD Yearly USD 80000.00 100000.00 YEAR
Job Description & How to Apply Below
Location: Germany

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.

Qualification

Requirements
  • 10+ years of software development experience
  • Hotspot JVM or Graal

    VM experience
  • Experience with compilers, parsers, interpreters, and garbage collectors
  • Experience with performance, static code, and data-flow analysis
  • Excellent debugging, critical thinking, and interpersonal skills
  • Expertise in the plain vanilla Java programming language, VM, and its ecosystem of libraries and tools
  • Mastery of the building blocks of JVM, with comfort using Java without large frameworks
  • Familiarity with high-performance architectural systems and design patterns
  • Experience in a tech or team lead role with the ability to guide engineers up to the Staff level
  • 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 test-driven software development processes and continuous integration tools and systems
  • Master’s degree in Computer Science or a similar field, or equivalent work experience
  • Ability to work at the big picture level and the deep line of code level, as well as switching between those
  • Experience working on creating new things, besides taking off-the-shelf components and bolting them together
  • Being comfortable given an IDE and Java with no 3rd party libraries to write a high-performance HTTP2 server in a month
  • Experience performance-turning applications, ideally in a world where nanoseconds matter
  • Experience with tools like JProfiler, Your Kit, async profiler, JMH, etc.
Other skills that are great to bring with you but that we can help you develop
  • Experience with distributed open-source application development
  • Knowledge of blockchain/DLT technology ecosystem
  • Familiarity with security principles and cryptographic tools and libraries
  • Experience writing and debugging smart contracts for an EVM-based ledger
  • Experience with web3 tools written in JavaScript or Type Script
  • Knowledge in Data streams, event-driven architecture
  • Understanding of performance primitives like hashes and public/private key pair signing in terms of how they are used as the building blocks of trust systems
  • Experience with High Frequency Trading systems in Java
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