Senior Java Developer

We are looking for a Senior Java Developer to join our engineering team in Warsaw. This is a hybrid role with 3 days per week in the office, giving you the perfect balance between collaboration and flexibility. At Sigma Software, we value engineering excellence, multicultural teamwork, and delivering secure, high-performance solutions. Why join us? You’ll work on a large-scale platform serving millions of users, contribute to architectural decisions, and be part of a company where innovation and ownership are encouraged. CUSTOMER Our customer is a well-established international company in the iGaming industry, known for its engineering-driven culture and multicultural team distributed across multiple countries. Operating multiple brands across various markets, the company delivers secure, high-performance digital platforms recognized for reliability and scalability. PROJECT You will be part of an experienced engineering team responsible for developing and maintaining a large-scale platform built on a modern microservices architecture. The platform supports multiple brands and geographies and operates in a high-load environment with a strong focus on scalability, reliability, security, and performance. The work includes designing and developing backend services, improving system architecture, optimizing performance, and ensuring the stability and maintainability of distributed systems.