Senior Java Developer

HeadHR; Warszawa; On-site; PLN 140,000 - 180,000; Full time

Benefits offered by this job

Attractive salary

Sports package

Medical package

Opportunity to work on interesting projects

Job summary

HeadHR is seeking a Java Programmer to join their team in Warsaw, Poland. The ideal candidate will have a minimum of 7 years of experience in Java programming and a solid understanding of multithreading. The role involves developing low-latency trading systems and collaborating closely with Quant teams. We offer an attractive salary, medical and sports packages, and the opportunity to work on cutting-edge projects.

Qualifications

• Minimum 7 years of experience in Java programming.
• Very good understanding of multithreading concepts.
• Ability to work effectively in a team.

Responsibilities

• Development of a low-latency trading system.
• Participation in technical work planning.
• Monitoring applications and code profiling.

Skills

Java programming

Multithreading

Teamwork

Clean Code principles

Kafka

gRPC

REST

WebSockets

Fluent in Polish

Education

Higher education in IT-related fields

Job description

Requirements:

• minimum 7 years of experience in Java programming,
• very good understanding of multithreading concepts,
• communication skills and ability to effectively work in a team,
• knowledge and practical application of Clean Code principles,
• familiarity with Java, Kafka, gRPC, REST, WebSockets
• higher education (in IT-related fields or related),
• fluent in spoken and written Polish

Responsibilities:

• development of a low-latency trading system,
• participation in technical work planning and making key architectural decisions,
• monitoring applications, code profiling, and microsecond-level optimization,
• identifying and eliminating system bottlenecks at the code, JVM, and network levels,
• integration with external data providers (cryptocurrency exchanges),
• code review and sharing knowledge and best practices with the team,
• close collaboration with Quant teams (trading data science) to understand, analyze, and implement trading algorithms.

We offer:

• Attractive salary
• Sports package
• Medical package
• Opportunity to work on interesting projects