Senior/Principal Java Engineer - Low Latency
We're looking for Senior and Principal Java Developers with a strong background in low-latency systems to join us on a high-performance trading and real-time data project, for a major financial institution.
You'll be joining an environment where good software engineering truly matters 6 where clean design, measurable performance, and deep system understanding are valued. This is an opportunity to work alongside recognised low-latency specialists, elevate your expertise, and contribute to systems that demand precision and technical excellence.
We're looking for developers who are technically exceptional, but also pragmatic 6 engineers who love to understand how things work under the hood, measure performance precisely, and continuously refine their craft.
Essential functions
You'll work on mission-critical applications where performance, scalability, and reliability truly matter 6 the kind of systems that power global trading platforms and require a deep understanding of how the JVM and Linux really work. This is an opportunity to bring world-class engineering principles to projects at the very heart of modern finance.
Your work will focus on writing and tuning high-performance Java frameworks, improving throughput and latency, and applying event-driven, microservice-based architectures. You'll collaborate closely with other talented engineers, helping to shape elegant solutions to complex, performance-sensitive problems.
Qualifications
Core Skills
Strong Java skills with deep knowledge of the JVM
Proven experience building or optimising low-latency systems
Familiarity with performance tuning and profiling tools (e.g. JMH, async-profiler, Flight Recorder)
Solid understanding of multithreading, concurrency, and memory management
Experience with microservice architectures and event-driven systems
Strong Linux fundamentals and comfort with performance diagnostics
Clear communication skills and ability to articulate design and performance decisions
Would be a plus
Nice To Have
Experience with high-performance messaging (Chronicle Queue/Wire, Aeron, ZeroMQ, Kafka tuning)
Familiarity with off-heap or direct memory structures (Chronicle Map, VarHandles, DirectByteBuffers)
Networking/I/O frameworks such as Netty or custom FIX engines
Exposure to OpenHFT, LMAX Disruptor, or similar performance-focused frameworks
Prior experience in trading, financial markets, or real-time data systems
Ability to produce clear, lightweight documentation or UML diagrams when needed
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.
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Grid Dynamics is an equal opportunity employer. We are committed to creating an inclusive environment for all employees during their employment and for all candidates during the application process.
All qualified applicants will receive consideration for employment without regard to, and will not be discriminated against based on, age, race, gender, color, religion, national origin, sexual orientation, gender identity, veteran status, disability or any other protected category. All employment is decided on the basis of qualifications, merit, and business need.