Senior Java Engineer

Job Description

Software Engineer (Java)

Remote (US preferred – open to Europe, EST hours)
$160,000 – $200,000

Company Overview

A well-funded, product-led Web3 infrastructure company building high-performance, mission-critical distributed systems that power next-generation digital finance. The engineering culture is deeply focused on correctness, performance, and long-term system design. This is not about stitching tools together – the team builds core infrastructure from first principles, where every line of code matters and performance is a core business requirement.

Role Overview

This role is for a senior Java engineer who enjoys solving deep technical problems and building low-level, high-throughput systems. You’ll join a small, elite engineering team working on core protocol and platform components that must be fast, efficient, and mathematically correct. This is a hands-on role where you’ll design and build systems from scratch and influence the architecture of a publicly visible ledger.

Key Responsibilities

• Design and build low-latency, high-throughput Java systems from scratch
  
  

• Invent new data structures, algorithms, and protocols for novel technical problems
  
  

• Optimise memory usage and performance at a very low level
  
  

• Build core infrastructure such as parsers, interpreters, and internal tooling
  
  

• Create performance tooling, profilers, and testing harnesses
  
  

• Drive architectural decisions that impact correctness and system integrity
  
  

• Mentor senior engineers and contribute to technical leadership
  
  

Ideal Candidate Profile

Must-Haves:

• 10+ years of professional software engineering experience
  
  

• Deep expertise in Java & JVM internals (GC, memory model, threading, profiling)
  
  

• Strong computer science fundamentals (algorithms, data structures, concurrency)
  
  

• Proven experience building high-performance, correctness-critical systems
  
  

• Comfortable building production systems from first principles
  
  

• Strong focus on clean, maintainable, long-lived code
  
  

Nice-to-Haves:

• Experience with distributed systems, blockchain, or Web3 infrastructure
  
  

• Knowledge of cryptography fundamentals
  
  

• Exposure to event-driven systems or low-latency trading platforms
  
  

• Experience with performance tooling (e.g. profilers, benchmarking frameworks)
  
  

What’s On Offer

• Work on deeply technical, long-term infrastructure
  
  

• High autonomy in a small, elite engineering team
  
  

• Remote working with US-based collaboration (EST hours)
  
  

• Opportunity to build systems that underpin real financial value
  
  

Hiring Process

• Introductory call
  
  

• Hiring manager discussion
  
  

• Technical interview
  
  

• Final stage interview