Senior / Principal Java Developer – Low Latency Trading

About The Role We are looking for multiple Senior and Principal Java Developers to join a high-performing engineering team responsible for building next-generation electronic trading technology. This is an opportunity to work on business-critical, ultra-low latency trading systems where performance, reliability and scalability are fundamental. You'll design and develop sophisticated event-driven platforms, optimise system performance at every layer of the stack, and help shape the architecture of complex distributed applications used across global financial markets. We're looking for engineers who are passionate about writing exceptional Java, enjoy solving complex performance challenges, and have a deep understanding of how software interacts with hardware, operating systems and networks. What We're Looking For You'll be a passionate engineer who enjoys solving complex technical problems and takes pride in producing elegant, high-quality software. You'll have a collaborative approach, thrive in highly technical environments, and be motivated by building systems where every microsecond matters. This is an excellent opportunity to join a world-class engineering team working on some of the most demanding low-latency trading technology in the financial industry. Responsibilities Key Responsibilities Design and develop ultra-low latency Java applications and frameworks. Build scalable event-driven microservices supporting mission-critical trading platforms. Analyse, benchmark and optimise application performance across the JVM, operating system and network stack. Design clean, maintainable and scalable software architectures. Implement high-quality, production-ready software following engineering best practices. Participate in architectural discussions and contribute to technical strategy. Produce clear technical documentation, including UML sequence diagrams where appropriate. Collaborate closely with software engineers, architects and business stakeholders to deliver robust solutions. Requirements Essential Skills & Experience Expert-level Java development experience. Proven commercial experience building low latency, high-performance applications. Deep understanding of: Modern Java JVM internals Linux operating systems Concurrency and multithreading Performance profiling and optimisation Strong software architecture and design skills. Experience delivering complex software projects throughout the full development lifecycle. Excellent communication skills with the ability to explain complex technical concepts clearly. Experience with any of the following is highly desirable High-Performance Messaging Chronicle Queue / Chronicle Wire Aeron Kafka (low-latency implementations) ZeroMQ Memory & Performance Chronicle Map Direct ByteBuffers Off-heap memory Unsafe APIs / VarHandles Networking Netty epoll / kqueue FIX Protocol QuickFIX/J SBE (Simple Binary Encoding) FIXP Performance Engineering JMH (Java Microbenchmark Harness) Java Flight Recorder Mission Control async-profiler perf JVM GC tuning (ZGC, Shenandoah, G1) Specialist Frameworks OpenHFT libraries LMAX Disruptor Aeron Cluster Lock-free queues and ring-buffer implementations Nice to have Desirable Experience Electronic trading or algorithmic trading platforms. FX trading systems. KDB+. Grafana. Experience with Ambrosia low-latency framework. We offer Opportunity to work on bleeding-edge projects Work with a highly motivated and dedicated team Competitive salary Flexible schedule Benefits package - medical insurance, sports Corporate social events Professional development opportunities Well-equipped office About Us Grid Dynamics (NASDAQ: GDYN) is a leading provider of technology consulting, platform and product engineering, AI, and advanced analytics services. Fusing technical vision with business acumen, we solve the most pressing technical challenges and enable positive business outcomes for enterprise companies undergoing business transformation. A key differentiator for Grid Dynamics is our 8 years of experience and leadership in enterprise AI, supported by profound expertise and ongoing investment in data, analytics, cloud & DevOps, application modernization and customer experience. Founded in 2006, Grid Dynamics is headquartered in Silicon Valley with offices across the Americas, Europe, and India.