Senior Java Engineer: Real-Time Trading Systems

Diverse CG Sp. z o.o. Sp.k. is seeking an experienced backend developer to build and maintain server-side Java applications in the Fraud Management domain. You will work in a Scrum team, helping design scalable solutions and maintainable code, while contributing to near real-time data pipelines.The role requires strong Java/Spring Boot, REST/SOAP, Kafka, and...

LeoVegas Group is seeking a highly experienced Staff Backend Engineer to lead the design and evolution of distributed systems in a fast-paced sports betting environment. You will guide architecture, raise engineering standards, and stay hands-on to balance business needs with platform health.You’ll mentor teams, drive observability and reliability, and...

Senior Java Developer – Trading SystemsCompany: Cantor FitzgeraldTeam: Trading Systems DevelopmentLocation: Poland (Warsaw)Employment type: Full-time, permanentResponsibilitiesDesign, develop, and maintain server-side Java applications for trading platforms.Implement robust, scalable solutions using Spring Framework and Spring Boot.Collaborate with...

DCG Poland is seeking a skilled back-end developer to join our client projects in the Fraud Management domain. You will develop server-side Java applications, participate in Scrum teams and contribute to design and data pipelines.Ideal candidates have strong Java/Spring Boot, Kafka, SQL and English proficiency, plus experience with microservices and modern...

Cantor Fitzgerald is seeking a Senior Java Developer for trading systems in Warsaw. You will design, develop and maintain server-side Java apps, using Spring and Spring Boot, while collaborating with analysts, traders and developers to deliver mission-critical features.The role focuses on high-throughput, low-latency real-time trading environments, with...

Citigroup Inc. is seeking a Lead Java Engineer to design, build, and own scalable backend services in a risk analytics platform.You will drive technical direction, mentor engineers, and deliver high-throughput, low-latency systems using Java, Spring, and modern data stores. You will work with Kafka, Redis, SQL Server, OpenShift, and CI/CD practices to ship...

Scalac Inc. is seeking a Senior Scala Developer for a globally recognized fintech project focused on post-trade automation and large-scale financial systems. The role offers fully remote work with collaboration across London-based engineering teams.You will design real-time data streaming components, build services with Akka, develop Kafka consumers, and...

Box Poland is seeking a Senior Front-End Engineer to help build Notes and Canvas real‑time collaboration features using React and Node.js. You’ll work on modern frontend with TypeScript, HTML/CSS, and robust state management, collaborating with cross‑functional teams.In this role you’ll contribute to scalable web apps, maintainable code, and...

Sigma Software is seeking a Senior Machine Learning Engineer to build production-grade ML models for a large-scale AdTech platform. You will design real-time decisioning, calibration, and counterfactual evaluation systems, enabling optimized campaigns and audience targeting.You will work with a team of data scientists and engineers to deploy scalable ML...