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 skilled 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!
J-18808-Ljbffr