Senior Java Backend Engineer (Core Java, Trading Systems)

Vistulo is recruiting for a major North American bank in the capital markets division, focusing on financial trading systems. The role involves working on large-scale, low-latency trading systems processing millions of daily transactions. The position is fully remote for residents of Poland and involves collaboration with teams across North America and Europe.

• Strong understanding of programming concepts, including algorithms, complexity, and data structures.
• Good knowledge of Java standard library data structures, both breadth and internals.
• Experience building distributed service-based applications using message queues.
• Strong analytical and problem-solving skills to diagnose production performance issues measured in microseconds.
• Open mind, curiosity, and strong desire to learn new technologies and business domains.
• Ability to clearly explain non-trivial systems and algorithms.
• Ability to follow and understand technical conversations.
• Ability to ask questions that speed up learning.
• Ability to align working schedule to US Eastern business hours.

Nice to have:

• Experience with financial markets and trading systems.
• Knowledge of AWS systems.
• Experience with Spring Boot.
• Experience with JVM tuning.
• Experience working remotely with North American firms.
• A computer science degree from a top Polish school.

• Design and implement robust software solutions for the bank’s trading systems using core Java (versions 8, 17, and 21).
• Understand, develop, and improve subsystems used by other teams in the trading platform.
• Create thorough test cases to ensure software stability and reliability.
• Collaborate with operations teams to build new features and improve existing functionality.
• Support production issues, including root-cause analysis and diagnosis.

Only open to residents of Poland, including Polish citizens and legal residents with permission to work in Poland.