Senior Java Developer

Description

We are looking for a Senior-level Java Developer to work on server-side development for a high-performance trading platform. You'll be responsible for building, optimizing, and enhancing core application logic focused on ultra-low-latency processing and seamless scalability. The project involves transforming financial information systems to modern cloud-based architecture while maintaining the highest standards of performance and reliability. Our Client is a leading global financial markets company specializing in derivatives trading and market infrastructure, operating one of the world's largest and most diverse derivatives marketplaces. This position offers remote work within Poland and work in the US Central Time (2 pm-10 pm). Ready to launch your career in cloud engineering? Apply now and join our global team! Responsibilities Design and develop robust Java applications using Core Java (8/11) with J2EE Architecture Build and maintain a microservices architecture with REST APIs Conduct performance tuning through benchmarking and capacity testing to identify system bottlenecks Optimize applications for high throughput by managing memory allocation and Java runtime options Minimize Garbage Collection impact and develop resource-efficient code Monitor and optimize system performance, including memory utilization, CPU usage, disk I/O, and system load Participate in code reviews and ensure adherence to development best practices Collaborate with cross-functional teams in an Agile/Scrum environment Support Google Cloud Platform transformation initiatives Solve complex technical problems creatively and communicate solutions effectively Provide L3 technical support for system components when required Lead and mentor team members to achieve critical project objectives Requirements Minimum 3+ years of hands-on Java development experience (Java 8 or 11) Strong understanding of Java core concepts: OOP, JVM, JNI, Maven Proficiency in advanced Java features: Multithreading, HashMap, Asynchronous programming, Concurrency, Shared memory Experience with Garbage Collection optimization and memory management Hands-on experience with IntelliJ IDEA development environment Deep knowledge of data structures and their performance characteristics (time and space complexity) Proven experience in financial services or trading desk environments Working knowledge of Agile/Scrum methodologies and CI/CD practices Strong analytical and problem-solving skills Ability to adapt quickly to dynamic work environments and make independent decisions Self-motivated individual who thrives in fast-paced, challenging environments Comfortable working both independently and as part of collaborative teams Excellent verbal and written communication skills in English (B2+ level) Strong team collaboration and interpersonal skills Nice to have Experience with Google Cloud Platform (GCP) Knowledge of containerization technologies, including Docker and Docker Swarm Manager Familiarity with the Kubernetes orchestration platform Experience with Jenkins for continuous integration and deployment Knowledge of Ansible for configuration management and automation Understanding of cloud-native development practices Experience with performance monitoring and observability tools

Requirements

• Minimum 3+ years of hands-on Java development experience (Java 8 or 11)

• Strong understanding of Java core concepts: OOP, JVM, JNI, Maven

• Proficiency in advanced Java features: Multithreading, HashMap, Asynchronous programming, Concurrency, Shared memory

• Experience with Garbage Collection optimization and memory management

• Hands-on experience with IntelliJ IDEA development environment

• Deep knowledge of data structures and their performance characteristics (time and space complexity)

• Proven experience in financial services or trading desk environments

• Working knowledge of Agile/Scrum methodologies and CI/CD practices

• Strong analytical and problem-solving skills

• Ability to adapt quickly to dynamic work environments and make independent decisions

• Self-motivated individual who thrives in fast-paced, challenging environments

• Comfortable working both independently and as part of collaborative teams

• Excellent verbal and written communication skills in English (B2+ level)

• Strong team collaboration and interpersonal skills

Responsibilities

• Design and develop robust Java applications using Core Java (8/11) with J2EE Architecture

• Build and maintain a microservices architecture with REST APIs

• Conduct performance tuning through benchmarking and capacity testing to identify system bottlenecks

• Optimize applications for high throughput by managing memory allocation and Java runtime options

• Minimize Garbage Collection impact and develop resource-efficient code

• Monitor and optimize system performance, including memory utilization, CPU usage, disk I/O, and system load

• Participate in code reviews and ensure adherence to development best practices

• Collaborate with cross-functional teams in an Agile/Scrum environment

• Support Google Cloud Platform transformation initiatives

• Solve complex technical problems creatively and communicate solutions effectively

• Provide L3 technical support for system components when required

• Lead and mentor team members to achieve critical project objectives

Seniority

• Senior

Nice to have

• Experience with Google Cloud Platform (GCP)

• Knowledge of containerization technologies, including Docker and Docker Swarm Manager

• Familiarity with the Kubernetes orchestration platform

• Experience with Jenkins for continuous integration and deployment

• Knowledge of Ansible for configuration management and automation

• Understanding of cloud-native development practices

• Experience with performance monitoring and observability tools