Senior Java Engineer (Fintech)

TL;DR

Senior Java Engineer (Java/Low-latency): Designing and maintaining high-performance systems for processing large volumes of real-time events with an accent on low-latency platforms and distributed architecture. Focus on optimizing JVM performance, implementing lock-free concurrency, and developing high-throughput networking layers.

Location: Hybrid in Sofia, Bulgaria

Company

hirify.global is a global technology services provider with over 6,000 specialists offering software development, tech advisory, and enterprise solutions.

What you will do

• Develop low-latency backend services capable of processing millions of events efficiently.
• Build concurrent, lock-free components for highly scalable multi-threaded applications.
• Optimize JVM performance, memory allocation, and garbage collection to achieve predictable latency.
• Design high-performance networking layers using Netty and Java NIO.
• Implement efficient binary messaging and serialization using SBE.
• Analyze system bottlenecks through profiling, benchmarking, and load testing.

Requirements

• 10+ years of professional Java development experience.
• Extensive experience building performance-critical, low-latency systems.
• Deep understanding of Java concurrency, JMM, and lock-free/non-blocking programming.
• Strong knowledge of JVM internals, GC tuning, Java NIO, and Netty.
• Experience working in financial, trading, market data, or similar real-time environments.
• Must be based in or be able to work hybrid in Sofia, Bulgaria

Culture & Benefits

• Equal opportunities in recruitment, career development, and leadership.
• Inclusive work environment fostering diversity and individual expression.
• Opportunity to work within a large, global community of technical specialists.

Hiring process

• Application review.
• Talent acquisition interview to discuss goals and fit.
• Technical interview focusing on expertise and problem-solving.
• Customer interview (depending on the specific project).