Overview
Senior Java Engineer - Layer-1 Blockchain. I\'m working with a Layer-1 blockchain company building its core systems from the ground up. The team is small and senior, and this role will have a direct impact on the architecture and performance of the network.
Responsibilities
- Inventing new protocols, data structures, and algorithms to solve novel problems
- Designing and writing low-latency, high-throughput Java systems from scratch
- Tuning memory usage to the byte and measuring performance to the nanosecond
- Writing parsers, interpreters, and other core infrastructure from first principles
- Mentoring engineers and leading complex technical initiatives
- Creating tools and profilers to measure and improve execution across the stack
- Making design decisions that affect the correctness of a public ledger
- Moving between system-level design and single-instruction-level optimization
- Building tests and harnesses that ensure long-term stability
Requirements
- 10+ years of professional software development experience
- Deep expertise in Java and the JVM (memory model, threading, GC, profiling)
- Experience with parsers, interpreters, compilers, or other language tooling
- Proven ability to write and optimize high-performance code with minimal dependencies
- Strong foundation in algorithms, data structures, and concurrency
- Significant experience building systems where performance and correctness are critical
- Ability to build from scratch with just an IDE and the JDK
- Hands-on with tools such as JMH, PBJ, async-profiler, JFR, Solo, YourKit, or similar
- Passion for code quality, system design, and correctness
- Master\'s degree in Computer Science (or equivalent experience)
Nice to have
- Experience in distributed systems and/or blockchain
- Knowledge of cryptographic primitives (hashes, public/private keys)
- Familiarity with Web3 tools or smart contract platforms (especially EVM)
- Background in event-driven architectures or high-frequency trading systems
- Understanding of test-driven development and CI practices
Note
This is a challenging role. It requires engineers who enjoy solving deep technical problems and building systems where every line of code matters.
If this is you - and you live in US, Europe, or main centres then send me a CV which fits the above JD to
If your CV is a fit - I'll be in touch!
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