Java Developer

• Design, develop, and maintain server‑side Java applications supporting trading platforms.
• Build robust, scalable solutions using the Spring Framework and Spring Boot.
• Collaborate with business analysts, traders, and engineering teams to deliver mission‑critical features.
• Optimise application performance for high throughput and low‑latency execution.
• Ensure code quality through unit testing and end‑to‑end automated testing.
• Participate in DevOps initiatives, contributing to CI/CD pipelines using Git/GitLab, Maven, and Jenkins.
• Troubleshoot production issues and provide timely resolutions in real‑time environments.

Company overview:

Cantor is a global financial services firm with over 75 years of history, known for its entrepreneurial culture, independence, and focus on innovation. Founded in 1945, the firm provides investment banking, capital markets, trading, research, and advisory services to institutional clients worldwide.

As part of its international growth, Cantor has opened a new office in Warsaw, creating a new technology hub that supports global initiatives and works closely with international teams. The Warsaw (Poland) office plays an important role in the company’s long‑term development and future growth.

Work Arrangement

• This is a hybrid role based in Warsaw, with three days per week in the office. For candidates located outside Warsaw, we are open to remote contract arrangements.
• The role is offered primarily as a permanent contract (Umowa o Pracę – UoP). B2B contracts are also available.
• Salary range: 30,000 PLN – 40,000 PLN (depending on experience and contract type).

Benefits and the office:

• Private heal care
• Sport subscription
• Modern office setup
• Free coffee
• Free beverages
• Gym
• Bike parking
• Playroom
• Canteen
• Startup atmosphere

Core Competencies & Skills

• Strong proficiency in Java (8+) with experience building server‑side applications.
• Expertise in Spring, Spring Boot, and Maven.
• Hands‑on experience with web application frameworks such as Angular or React.
• Solid understanding of multithreading, concurrency, and application performance tuning.
• Experience with CI/CD pipelines, DevOps processes, and deployment automation.
• Familiarity with message queue systems such as Kafka or JMS, and RESTful services.
• Strong working knowledge of SQL and relational databases (Oracle, PostgreSQL).

Qualifications

• Bachelor’s degree in Computer Science, Engineering, or a related field.
• 5+ years of professional experience in Java development.
• Prior experience in electronic trading systems, brokerage platforms, or financial services technology is a strong advantage.

Desirable Skills

• Experience with monitoring and observability tools such as Splunk, ELK, Grafana, or Prometheus.