Senior Java Engineer — Real-Time DEX Market Platform

United States Digital Space LLC; Hong Kong; On-site; HKD 600,000 - 900,000; Full time

Job summary

United States Digital Space LLC is hiring a Java backend engineer to design and operate high‑performance systems for real‑time crypto market tracking. You will build scalable services with low latency, ensuring data accuracy across distributed components and multiple chains.

The role requires 3–5+ years' experience with Java, strong knowledge of the JVM, and a solid background in SQL optimization, caching, and messaging queues.

Qualifications

• 3–5+ years designing, building and operating Java-based high‑performance systems.
• Strong knowledge of JVM, concurrency, IO, and networking fundamentals.
• Experience with MySQL, transactions, indexing and SQL optimization.
• Familiarity with caching and messaging queues in distributed environments.
• Solid data structures, algorithms, and coding best practices.
• Excellent written and verbal communication in fast-paced teams.

Responsibilities

• Build and maintain the real-time market tracking backend.
• Develop high-throughput, low-latency services with reliable data pipelines.
• Troubleshoot issues to ensure service stability and quality.
• Deliver features on time with clean, well-tested code.
• Collaborate with product and other engineering teams to keep integrations running.

Skills

Java backend development

JVM & multithreading

High-performance systems

SQL optimization

Caching & message queues

Data structures & algorithms

Strong learning & communication

Education

Bachelor's or Master's in CS/SE

Job description

United States Digital Space LLC is hiring a Java backend engineer to design and operate high‑performance systems for real‑time crypto market tracking. You will build scalable services with low latency, ensuring data accuracy across distributed components and multiple chains.

The role requires 3–5+ years' experience with Java, strong knowledge of the JVM, and a solid background in SQL optimization, caching, and messaging queues.