Senior/Principal Java Engineer - Low Latency

Grid Dynamics; Greater London; On-site; GBP 70,000 - 90,000; Full time

Benefits offered by this job

Medical insurance

Flexible schedule

Sports benefits

Corporate social events

Professional development opportunities

Well-equipped office

Job summary

Grid Dynamics is seeking Senior and Principal Java Developers to work on a high-performance trading project for a major financial institution. Candidates should have deep knowledge of Java and the JVM, strong experience with low-latency systems, and familiarity with microservice architectures. You’ll be part of a dedicated team working on challenging, performance-sensitive applications, with benefits including professional development opportunities and a competitive salary.

Qualifications

• Strong Java expertise and knowledge of the JVM essential.
• Proven skills in low-latency systems development desirable.
• Proficient with performance tuning tools needed.

Responsibilities

• Develop and optimize mission-critical applications.
• Focus on high-performance Java frameworks.
• Collaborate to architect solutions for complex problems.

Skills

Strong Java skills with deep knowledge of the JVM

Experience building or optimizing low-latency systems

Familiarity with performance tuning and profiling tools

Solid understanding of multithreading and concurrency

Experience with microservice architectures

Strong Linux fundamentals

Clear communication skills

Tools

JMH

async-profiler

Flight Recorder

Job description

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.

Responsibilities

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.

Requirements

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

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.