Qualification Requirements:

• 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)

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

• 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

About the role:

Are you the kind of engineer who sees performance ceilings as a personal challenge, not a constraint? Do you get more satisfaction from squeezing 30% more throughput out of clean Java than from renting 30% more cloud? Do you dream of writing elegant, handcrafted code that stands the test of time and inspection? If that sounds like you, keep reading.

We’re building technologies that haven’t been built before. We're not gluing off-the-shelf components together; we're inventing systems from scratch that must be fast, small, correct, and built to last. Every line of code matters because it deals with people’s money and gets recorded publicly on an immutable ledger.

In a world where most engineers are encouraged to "move fast and break things," we’re a rare company where correctness, performance, and efficiency are the business model. Like NASA engineers launching rockets on 16-bit computers, we move fast and get it 100% right the first time.

This is a rare opportunity to be part of a small, elite team where you won’t be a tiny cog in a vast machine–you’ll be the person building the machine. If you're an engineer who loves puzzles, gets excited by new challenges, and wants to write software that really matters, this is the role for you.

You may be doing all of the following:

• 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

See full list of benefits on Glassdoor: https://www.glassdoor.com/Benefits/Hashgraph-US-Benefits-EI_IE10178939.0,9_IL.10,12_IN1.htm

Hedera stands apart as a leading EVM blockchain through its distinctive developer experience, enabling developers of all backgrounds to leverage familiar tools like Solidity or its JavaScript SDK* to build breakthrough applications.

Linux Foundation Decentralized Trust manages Hedera’s open-source codebase (as Project Hiero) including the hashgraph consensus algorithm which enables 10,000+ TPS, 3s finality, low fees priced in USD, and the highest grade (aBFT) of security. Meanwhile, the Hedera public network is governed by a diverse council of the world’s leading institutions to ensure transparent and fair decision-making.

By empowering the development of applications that solve real-world challenges across DeFi, tokenization, AI, digital identity, and more, Hedera is the trust layer that underpins a decentralized future.

For more information, visit www.hedera.com, or follow us on X at @hedera, Telegram at t.me/hederahashgraph, or Discord at www.hedera.com/discord. The Hedera whitepaper can be found at www.hedera.com/papers.

*Hedera also hasSDKs for Java, Python, Rust, Go, and Swift!