Full Stack Developer (Frontend-Focused /JavaScript)

Cantor Fitzgerald is a global financial services firm with over 75 years of history, providing investment banking, capital markets, trading, research, and advisory services to institutional clients worldwide. The Warsaw office is a new technology hub supporting global initiatives and international teams, playing an important role in the company’s long-term development and future growth.

• 3+ years of full-stack JavaScript development experience delivering production web applications.
• Strong experience with a modern frontend framework: React or Angular (or similar).
• Solid understanding of Redux/Flux state management patterns or equivalent.
• Strong understanding of Functional Programming and Object-Oriented Programming paradigms.
• Practical experience building backend services with Node.js and Express (REST APIs, middleware, routing, error handling).
• Strong knowledge of SQL and relational database design; ability to optimize queries and data access patterns.
• Experience with CI/CD practices and tools; familiarity with release automation.
• Experience with Docker and container-based workflows.
• Working knowledge of testing practices: unit testing and E2E automation.
• Proven ability to collaborate effectively, communicate clearly, and take ownership of deliverables.

Nice to have:

• Experience with observability/monitoring tools such as Splunk, ELK stack, Grafana/Prometheus, and metrics instrumentation.
• Some experience with Java and/or Python for backend services, integrations, or scripting.
• Exposure to high-performance, low-latency systems or financial services/trading domain.
• Bachelor’s degree in Computer Science, Engineering, or related field (or equivalent practical experience).
• Strong problem-solving skills and attention to performance, reliability, and maintainability.

• Develop and maintain full-stack web applications supporting trading and brokerage workflows.
• Build responsive, high-performance web interfaces using a modern framework (e.g., React, Angular, or similar).
• Implement and optimize server-side components using Node.js (including Express) for speed, scalability, and reliability.
• Drive client-side and server-side performance tuning to support low-latency user experience.
• Work with SQL databases for data persistence, data modeling, and query optimization.
• Build and maintain CI/CD pipelines and deployment automation.
• Containerize applications using Docker for streamlined development and deployment.
• Implement and maintain unit tests and end-to-end (E2E) test automation to ensure quality and reliability.
• Collaborate with engineers and stakeholders to deliver robust, user-friendly solutions in an Agile environment.

• Hybrid role based in Warsaw with three days per week in the office.
• Remote contract arrangements considered for candidates outside Warsaw.
• Role offered primarily as a permanent contract (Umowa o Pracę - UoP) with B2B contracts also available.